./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum_const_m2.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_const_m2.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 06c952a07d861e134050c8036ebe12899287d1c68b93fe51209b5cc562011a68 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 09:57:26,372 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 09:57:26,374 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 09:57:26,422 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 09:57:26,422 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 09:57:26,424 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 09:57:26,425 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 09:57:26,428 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 09:57:26,429 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 09:57:26,430 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 09:57:26,431 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 09:57:26,433 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 09:57:26,433 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 09:57:26,437 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 09:57:26,438 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 09:57:26,441 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 09:57:26,442 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 09:57:26,443 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 09:57:26,445 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 09:57:26,450 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 09:57:26,451 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 09:57:26,452 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 09:57:26,453 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 09:57:26,454 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 09:57:26,455 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 09:57:26,457 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 09:57:26,458 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 09:57:26,458 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 09:57:26,459 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 09:57:26,459 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 09:57:26,460 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 09:57:26,460 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 09:57:26,460 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 09:57:26,461 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 09:57:26,461 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 09:57:26,462 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 09:57:26,462 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 09:57:26,462 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 09:57:26,462 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 09:57:26,463 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 09:57:26,463 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 09:57:26,465 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 09:57:26,465 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 09:57:26,491 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 09:57:26,492 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 09:57:26,492 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 09:57:26,492 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 09:57:26,493 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 09:57:26,493 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 09:57:26,494 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 09:57:26,494 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 09:57:26,494 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 09:57:26,495 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 09:57:26,495 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 09:57:26,495 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 09:57:26,495 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 09:57:26,496 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 09:57:26,496 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 09:57:26,496 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 09:57:26,496 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 09:57:26,496 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 09:57:26,496 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 09:57:26,497 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 09:57:26,498 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 09:57:26,498 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 09:57:26,498 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 09:57:26,498 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 09:57:26,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 09:57:26,499 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 09:57:26,499 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 09:57:26,499 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 09:57:26,499 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 09:57:26,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 09:57:26,500 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 09:57:26,500 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 09:57:26,500 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 09:57:26,500 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 06c952a07d861e134050c8036ebe12899287d1c68b93fe51209b5cc562011a68 [2022-07-19 09:57:26,729 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 09:57:26,750 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 09:57:26,753 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 09:57:26,754 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 09:57:26,755 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 09:57:26,756 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_const_m2.c [2022-07-19 09:57:26,810 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e17a79734/449c723cc0cb452b9188e4796d59ce69/FLAG975e0c1a0 [2022-07-19 09:57:27,203 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 09:57:27,204 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const_m2.c [2022-07-19 09:57:27,210 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e17a79734/449c723cc0cb452b9188e4796d59ce69/FLAG975e0c1a0 [2022-07-19 09:57:27,620 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e17a79734/449c723cc0cb452b9188e4796d59ce69 [2022-07-19 09:57:27,622 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 09:57:27,624 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 09:57:27,628 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 09:57:27,628 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 09:57:27,631 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 09:57:27,632 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:57:27" (1/1) ... [2022-07-19 09:57:27,633 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25917f69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:57:27, skipping insertion in model container [2022-07-19 09:57:27,633 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:57:27" (1/1) ... [2022-07-19 09:57:27,639 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 09:57:27,653 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 09:57:27,771 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_const_m2.c[408,421] [2022-07-19 09:57:27,793 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 09:57:27,799 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 09:57:27,811 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_const_m2.c[408,421] [2022-07-19 09:57:27,818 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 09:57:27,832 INFO L208 MainTranslator]: Completed translation [2022-07-19 09:57:27,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:57:27 WrapperNode [2022-07-19 09:57:27,833 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 09:57:27,833 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 09:57:27,833 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 09:57:27,834 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 09:57:27,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:57:27" (1/1) ... [2022-07-19 09:57:27,844 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:57:27" (1/1) ... [2022-07-19 09:57:27,866 INFO L137 Inliner]: procedures = 16, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 82 [2022-07-19 09:57:27,866 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 09:57:27,867 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 09:57:27,867 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 09:57:27,868 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 09:57:27,875 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:57:27" (1/1) ... [2022-07-19 09:57:27,875 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:57:27" (1/1) ... [2022-07-19 09:57:27,886 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:57:27" (1/1) ... [2022-07-19 09:57:27,886 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:57:27" (1/1) ... [2022-07-19 09:57:27,890 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:57:27" (1/1) ... [2022-07-19 09:57:27,893 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:57:27" (1/1) ... [2022-07-19 09:57:27,894 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:57:27" (1/1) ... [2022-07-19 09:57:27,896 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 09:57:27,896 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 09:57:27,897 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 09:57:27,897 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 09:57:27,898 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:57:27" (1/1) ... [2022-07-19 09:57:27,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 09:57:27,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:57:27,923 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 09:57:27,924 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 09:57:27,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 09:57:27,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 09:57:27,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 09:57:27,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 09:57:27,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 09:57:27,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 09:57:27,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 09:57:28,007 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 09:57:28,008 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 09:57:28,112 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 09:57:28,118 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 09:57:28,118 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-07-19 09:57:28,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:57:28 BoogieIcfgContainer [2022-07-19 09:57:28,120 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 09:57:28,121 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 09:57:28,122 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 09:57:28,124 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 09:57:28,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:57:27" (1/3) ... [2022-07-19 09:57:28,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31286563 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:57:28, skipping insertion in model container [2022-07-19 09:57:28,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:57:27" (2/3) ... [2022-07-19 09:57:28,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31286563 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:57:28, skipping insertion in model container [2022-07-19 09:57:28,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:57:28" (3/3) ... [2022-07-19 09:57:28,127 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m2.c [2022-07-19 09:57:28,140 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 09:57:28,140 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 09:57:28,178 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 09:57:28,184 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@6f691034, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@506dac06 [2022-07-19 09:57:28,185 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 09:57:28,188 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 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 09:57:28,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-19 09:57:28,193 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:57:28,194 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:57:28,194 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:57:28,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:57:28,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1122046426, now seen corresponding path program 1 times [2022-07-19 09:57:28,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:57:28,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841653567] [2022-07-19 09:57:28,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:57:28,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:57:28,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:57:28,356 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 09:57:28,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:57:28,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841653567] [2022-07-19 09:57:28,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841653567] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:57:28,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 09:57:28,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 09:57:28,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488303154] [2022-07-19 09:57:28,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:57:28,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 09:57:28,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:57:28,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 09:57:28,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 09:57:28,424 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 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 7.5) internal successors, (15), 2 states have internal predecessors, (15), 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 09:57:28,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:57:28,449 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2022-07-19 09:57:28,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 09:57:28,451 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 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 15 [2022-07-19 09:57:28,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:57:28,458 INFO L225 Difference]: With dead ends: 47 [2022-07-19 09:57:28,458 INFO L226 Difference]: Without dead ends: 21 [2022-07-19 09:57:28,461 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 09:57:28,467 INFO L413 NwaCegarLoop]: 31 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, 31 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 09:57:28,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:57:28,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-07-19 09:57:28,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-07-19 09:57:28,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:57:28,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-07-19 09:57:28,500 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 15 [2022-07-19 09:57:28,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:57:28,501 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-07-19 09:57:28,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 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 09:57:28,502 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-07-19 09:57:28,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-19 09:57:28,503 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:57:28,503 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:57:28,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 09:57:28,504 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:57:28,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:57:28,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1896542740, now seen corresponding path program 1 times [2022-07-19 09:57:28,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:57:28,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095398870] [2022-07-19 09:57:28,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:57:28,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:57:28,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:57:28,605 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 09:57:28,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:57:28,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095398870] [2022-07-19 09:57:28,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095398870] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:57:28,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 09:57:28,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 09:57:28,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405728620] [2022-07-19 09:57:28,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:57:28,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 09:57:28,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:57:28,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 09:57:28,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 09:57:28,612 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 09:57:28,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:57:28,666 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2022-07-19 09:57:28,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 09:57:28,667 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 15 [2022-07-19 09:57:28,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:57:28,667 INFO L225 Difference]: With dead ends: 39 [2022-07-19 09:57:28,668 INFO L226 Difference]: Without dead ends: 23 [2022-07-19 09:57:28,669 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 09:57:28,670 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:57:28,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 26 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:57:28,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-19 09:57:28,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-07-19 09:57:28,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:57:28,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-07-19 09:57:28,680 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2022-07-19 09:57:28,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:57:28,680 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-07-19 09:57:28,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 09:57:28,683 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-07-19 09:57:28,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-19 09:57:28,684 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:57:28,684 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:57:28,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 09:57:28,685 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:57:28,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:57:28,689 INFO L85 PathProgramCache]: Analyzing trace with hash -66597874, now seen corresponding path program 1 times [2022-07-19 09:57:28,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:57:28,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497420396] [2022-07-19 09:57:28,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:57:28,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:57:28,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:57:28,775 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 09:57:28,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:57:28,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497420396] [2022-07-19 09:57:28,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497420396] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:57:28,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 09:57:28,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 09:57:28,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937246600] [2022-07-19 09:57:28,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:57:28,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 09:57:28,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:57:28,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 09:57:28,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 09:57:28,779 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 09:57:28,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:57:28,832 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2022-07-19 09:57:28,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 09:57:28,833 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 17 [2022-07-19 09:57:28,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:57:28,834 INFO L225 Difference]: With dead ends: 44 [2022-07-19 09:57:28,834 INFO L226 Difference]: Without dead ends: 31 [2022-07-19 09:57:28,834 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 09:57:28,836 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:57:28,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 13 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:57:28,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-19 09:57:28,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2022-07-19 09:57:28,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 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 09:57:28,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-07-19 09:57:28,851 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2022-07-19 09:57:28,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:57:28,852 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-07-19 09:57:28,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 09:57:28,852 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-07-19 09:57:28,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-19 09:57:28,853 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:57:28,853 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] [2022-07-19 09:57:28,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 09:57:28,854 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:57:28,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:57:28,858 INFO L85 PathProgramCache]: Analyzing trace with hash -2060422634, now seen corresponding path program 1 times [2022-07-19 09:57:28,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:57:28,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448679516] [2022-07-19 09:57:28,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:57:28,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:57:28,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:57:28,943 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 09:57:28,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:57:28,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448679516] [2022-07-19 09:57:28,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448679516] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:57:28,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284107432] [2022-07-19 09:57:28,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:57:28,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:57:28,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:57:28,947 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 09:57:28,948 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 09:57:28,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:57:29,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 09:57:29,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:57:29,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 09:57:29,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:57:29,083 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 09:57:29,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284107432] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:57:29,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:57:29,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-19 09:57:29,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22694085] [2022-07-19 09:57:29,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:57:29,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 09:57:29,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:57:29,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 09:57:29,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-07-19 09:57:29,086 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 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 09:57:29,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:57:29,148 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2022-07-19 09:57:29,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 09:57:29,149 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 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 25 [2022-07-19 09:57:29,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:57:29,150 INFO L225 Difference]: With dead ends: 49 [2022-07-19 09:57:29,150 INFO L226 Difference]: Without dead ends: 29 [2022-07-19 09:57:29,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 46 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 09:57:29,151 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:57:29,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 28 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:57:29,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-19 09:57:29,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-07-19 09:57:29,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 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 09:57:29,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-07-19 09:57:29,157 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2022-07-19 09:57:29,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:57:29,157 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-07-19 09:57:29,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 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 09:57:29,157 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-07-19 09:57:29,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-19 09:57:29,158 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:57:29,158 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] [2022-07-19 09:57:29,186 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 09:57:29,382 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 09:57:29,383 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:57:29,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:57:29,384 INFO L85 PathProgramCache]: Analyzing trace with hash -959615560, now seen corresponding path program 2 times [2022-07-19 09:57:29,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:57:29,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385063356] [2022-07-19 09:57:29,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:57:29,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:57:29,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:57:29,441 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-19 09:57:29,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:57:29,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385063356] [2022-07-19 09:57:29,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385063356] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:57:29,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053521297] [2022-07-19 09:57:29,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:57:29,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:57:29,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:57:29,444 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 09:57:29,445 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 09:57:29,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:57:29,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:57:29,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 09:57:29,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:57:29,580 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-19 09:57:29,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:57:29,628 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-19 09:57:29,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053521297] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:57:29,628 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:57:29,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-07-19 09:57:29,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221818093] [2022-07-19 09:57:29,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:57:29,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 09:57:29,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:57:29,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 09:57:29,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-07-19 09:57:29,636 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:57:29,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:57:29,730 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2022-07-19 09:57:29,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 09:57:29,731 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-19 09:57:29,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:57:29,732 INFO L225 Difference]: With dead ends: 57 [2022-07-19 09:57:29,732 INFO L226 Difference]: Without dead ends: 41 [2022-07-19 09:57:29,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 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 09:57:29,734 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:57:29,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 22 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:57:29,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-19 09:57:29,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2022-07-19 09:57:29,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 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 09:57:29,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-07-19 09:57:29,747 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 27 [2022-07-19 09:57:29,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:57:29,748 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-07-19 09:57:29,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:57:29,748 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-07-19 09:57:29,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-19 09:57:29,750 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:57:29,750 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-19 09:57:29,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-19 09:57:29,971 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 09:57:29,972 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:57:29,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:57:29,972 INFO L85 PathProgramCache]: Analyzing trace with hash -2048824896, now seen corresponding path program 3 times [2022-07-19 09:57:29,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:57:29,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168682977] [2022-07-19 09:57:29,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:57:29,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:57:30,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:57:30,984 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:57:30,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:57:30,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168682977] [2022-07-19 09:57:30,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168682977] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:57:30,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569999178] [2022-07-19 09:57:30,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 09:57:30,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:57:30,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:57:30,986 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 09:57:30,996 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 09:57:31,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 09:57:31,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:57:31,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-19 09:57:31,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:57:32,814 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 09:57:32,815 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 09:57:33,081 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:57:33,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:57:37,613 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 09:57:37,613 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 09:57:37,863 INFO L356 Elim1Store]: treesize reduction 40, result has 52.9 percent of original size [2022-07-19 09:57:37,864 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 09:57:38,579 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:57:38,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569999178] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:57:38,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:57:38,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 29, 28] total 73 [2022-07-19 09:57:38,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277205552] [2022-07-19 09:57:38,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:57:38,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-07-19 09:57:38,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:57:38,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-07-19 09:57:38,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=4828, Unknown=0, NotChecked=0, Total=5256 [2022-07-19 09:57:38,585 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 73 states, 73 states have (on average 1.3287671232876712) internal successors, (97), 73 states have internal predecessors, (97), 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 09:57:40,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:57:40,767 INFO L93 Difference]: Finished difference Result 97 states and 111 transitions. [2022-07-19 09:57:40,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-19 09:57:40,768 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.3287671232876712) internal successors, (97), 73 states have internal predecessors, (97), 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 09:57:40,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:57:40,769 INFO L225 Difference]: With dead ends: 97 [2022-07-19 09:57:40,769 INFO L226 Difference]: Without dead ends: 91 [2022-07-19 09:57:40,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 18 SyntacticMatches, 9 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2483 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=890, Invalid=9412, Unknown=0, NotChecked=0, Total=10302 [2022-07-19 09:57:40,774 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 288 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:57:40,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 87 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 270 Invalid, 0 Unknown, 288 Unchecked, 0.2s Time] [2022-07-19 09:57:40,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-19 09:57:40,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2022-07-19 09:57:40,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 62 states have internal predecessors, (73), 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 09:57:40,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2022-07-19 09:57:40,791 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 35 [2022-07-19 09:57:40,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:57:40,792 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2022-07-19 09:57:40,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.3287671232876712) internal successors, (97), 73 states have internal predecessors, (97), 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 09:57:40,792 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2022-07-19 09:57:40,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-19 09:57:40,795 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:57:40,796 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:57:40,819 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 09:57:41,011 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 09:57:41,012 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:57:41,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:57:41,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1772469278, now seen corresponding path program 4 times [2022-07-19 09:57:41,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:57:41,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43359383] [2022-07-19 09:57:41,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:57:41,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:57:41,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:57:41,097 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 09:57:41,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:57:41,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43359383] [2022-07-19 09:57:41,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43359383] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:57:41,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870376937] [2022-07-19 09:57:41,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 09:57:41,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:57:41,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:57:41,100 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 09:57:41,101 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 09:57:41,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 09:57:41,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:57:41,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 09:57:41,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:57:41,228 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 09:57:41,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:57:41,299 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 09:57:41,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870376937] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:57:41,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:57:41,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-19 09:57:41,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884389502] [2022-07-19 09:57:41,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:57:41,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 09:57:41,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:57:41,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 09:57:41,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-07-19 09:57:41,305 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 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 09:57:41,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:57:41,453 INFO L93 Difference]: Finished difference Result 137 states and 156 transitions. [2022-07-19 09:57:41,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 09:57:41,454 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-07-19 09:57:41,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:57:41,456 INFO L225 Difference]: With dead ends: 137 [2022-07-19 09:57:41,456 INFO L226 Difference]: Without dead ends: 88 [2022-07-19 09:57:41,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 68 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 09:57:41,460 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 94 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:57:41,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 42 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:57:41,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-19 09:57:41,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 72. [2022-07-19 09:57:41,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 71 states have internal predecessors, (81), 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 09:57:41,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2022-07-19 09:57:41,481 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 37 [2022-07-19 09:57:41,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:57:41,483 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2022-07-19 09:57:41,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 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 09:57:41,483 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2022-07-19 09:57:41,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-19 09:57:41,487 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:57:41,487 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:57:41,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 09:57:41,703 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 09:57:41,703 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:57:41,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:57:41,704 INFO L85 PathProgramCache]: Analyzing trace with hash -192826428, now seen corresponding path program 5 times [2022-07-19 09:57:41,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:57:41,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377850706] [2022-07-19 09:57:41,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:57:41,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:57:41,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:57:41,773 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-19 09:57:41,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:57:41,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377850706] [2022-07-19 09:57:41,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377850706] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:57:41,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487789703] [2022-07-19 09:57:41,774 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 09:57:41,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:57:41,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:57:41,776 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 09:57:41,803 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 09:57:41,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-19 09:57:41,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:57:41,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 09:57:41,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:57:41,927 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-19 09:57:41,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:57:41,974 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-19 09:57:41,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487789703] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:57:41,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:57:41,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-19 09:57:41,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590331388] [2022-07-19 09:57:41,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:57:41,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 09:57:41,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:57:41,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 09:57:41,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-07-19 09:57:41,977 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 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 09:57:42,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:57:42,162 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2022-07-19 09:57:42,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 09:57:42,163 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 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) Word has length 39 [2022-07-19 09:57:42,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:57:42,164 INFO L225 Difference]: With dead ends: 82 [2022-07-19 09:57:42,164 INFO L226 Difference]: Without dead ends: 60 [2022-07-19 09:57:42,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 71 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 09:57:42,165 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 64 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:57:42,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 30 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:57:42,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-19 09:57:42,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2022-07-19 09:57:42,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 45 states have internal predecessors, (50), 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 09:57:42,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-07-19 09:57:42,169 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 39 [2022-07-19 09:57:42,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:57:42,169 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-07-19 09:57:42,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 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 09:57:42,170 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-07-19 09:57:42,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-19 09:57:42,170 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:57:42,170 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-19 09:57:42,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 09:57:42,371 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 09:57:42,371 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:57:42,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:57:42,372 INFO L85 PathProgramCache]: Analyzing trace with hash -604138262, now seen corresponding path program 6 times [2022-07-19 09:57:42,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:57:42,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725591307] [2022-07-19 09:57:42,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:57:42,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:57:42,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:57:44,224 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:57:44,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:57:44,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725591307] [2022-07-19 09:57:44,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725591307] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:57:44,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836151783] [2022-07-19 09:57:44,225 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 09:57:44,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:57:44,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:57:44,226 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 09:57:44,227 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 09:57:44,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-19 09:57:44,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:57:44,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-19 09:57:44,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:57:46,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:57:46,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 09:57:46,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:57:46,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 09:57:46,073 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 09:57:46,074 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 17 [2022-07-19 09:57:46,160 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:57:46,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:57:50,384 INFO L356 Elim1Store]: treesize reduction 87, result has 57.8 percent of original size [2022-07-19 09:57:50,384 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 129 [2022-07-19 09:57:51,061 INFO L356 Elim1Store]: treesize reduction 145, result has 29.6 percent of original size [2022-07-19 09:57:51,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 72 [2022-07-19 09:57:51,676 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:57:51,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836151783] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:57:51,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:57:51,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 31, 32] total 92 [2022-07-19 09:57:51,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629439245] [2022-07-19 09:57:51,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:57:51,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-07-19 09:57:51,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:57:51,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-07-19 09:57:51,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=7961, Unknown=1, NotChecked=0, Total=8372 [2022-07-19 09:57:51,680 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 92 states, 92 states have (on average 1.3043478260869565) internal successors, (120), 92 states have internal predecessors, (120), 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 09:57:55,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:57:55,495 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2022-07-19 09:57:55,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-19 09:57:55,496 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.3043478260869565) internal successors, (120), 92 states have internal predecessors, (120), 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 45 [2022-07-19 09:57:55,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:57:55,496 INFO L225 Difference]: With dead ends: 79 [2022-07-19 09:57:55,496 INFO L226 Difference]: Without dead ends: 75 [2022-07-19 09:57:55,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3990 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=794, Invalid=14457, Unknown=1, NotChecked=0, Total=15252 [2022-07-19 09:57:55,499 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 21 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 1706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 330 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 09:57:55,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 147 Invalid, 1706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1283 Invalid, 0 Unknown, 330 Unchecked, 0.7s Time] [2022-07-19 09:57:55,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-19 09:57:55,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2022-07-19 09:57:55,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.121212121212121) internal successors, (74), 66 states have internal predecessors, (74), 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 09:57:55,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2022-07-19 09:57:55,508 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 45 [2022-07-19 09:57:55,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:57:55,508 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2022-07-19 09:57:55,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.3043478260869565) internal successors, (120), 92 states have internal predecessors, (120), 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 09:57:55,508 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2022-07-19 09:57:55,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-19 09:57:55,509 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:57:55,509 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:57:55,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-19 09:57:55,719 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 09:57:55,720 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:57:55,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:57:55,720 INFO L85 PathProgramCache]: Analyzing trace with hash -703050612, now seen corresponding path program 7 times [2022-07-19 09:57:55,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:57:55,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032068971] [2022-07-19 09:57:55,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:57:55,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:57:55,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:57:55,797 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-19 09:57:55,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:57:55,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032068971] [2022-07-19 09:57:55,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032068971] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:57:55,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090135469] [2022-07-19 09:57:55,798 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 09:57:55,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:57:55,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:57:55,800 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 09:57:55,826 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 09:57:55,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:57:55,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 09:57:55,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:57:55,961 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-19 09:57:55,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:57:56,022 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-19 09:57:56,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090135469] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:57:56,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:57:56,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-07-19 09:57:56,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532914885] [2022-07-19 09:57:56,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:57:56,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-19 09:57:56,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:57:56,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-19 09:57:56,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-07-19 09:57:56,024 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:57:56,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:57:56,231 INFO L93 Difference]: Finished difference Result 149 states and 164 transitions. [2022-07-19 09:57:56,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 09:57:56,232 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-07-19 09:57:56,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:57:56,232 INFO L225 Difference]: With dead ends: 149 [2022-07-19 09:57:56,233 INFO L226 Difference]: Without dead ends: 86 [2022-07-19 09:57:56,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 87 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 09:57:56,234 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 108 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:57:56,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 41 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 09:57:56,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-19 09:57:56,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 70. [2022-07-19 09:57:56,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 69 states have internal predecessors, (76), 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 09:57:56,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2022-07-19 09:57:56,242 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 47 [2022-07-19 09:57:56,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:57:56,242 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2022-07-19 09:57:56,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:57:56,242 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2022-07-19 09:57:56,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-19 09:57:56,243 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:57:56,243 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:57:56,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-19 09:57:56,459 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 09:57:56,460 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:57:56,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:57:56,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1992374766, now seen corresponding path program 8 times [2022-07-19 09:57:56,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:57:56,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938192831] [2022-07-19 09:57:56,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:57:56,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:57:56,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:57:56,533 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-19 09:57:56,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:57:56,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938192831] [2022-07-19 09:57:56,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938192831] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:57:56,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650960033] [2022-07-19 09:57:56,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:57:56,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:57:56,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:57:56,536 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 09:57:56,543 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 09:57:56,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:57:56,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:57:56,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 09:57:56,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:57:56,700 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-19 09:57:56,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:57:56,756 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-19 09:57:56,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650960033] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:57:56,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:57:56,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-07-19 09:57:56,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691554142] [2022-07-19 09:57:56,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:57:56,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-19 09:57:56,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:57:56,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-19 09:57:56,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-07-19 09:57:56,758 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:57:56,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:57:56,959 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2022-07-19 09:57:56,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 09:57:56,959 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-07-19 09:57:56,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:57:56,960 INFO L225 Difference]: With dead ends: 80 [2022-07-19 09:57:56,960 INFO L226 Difference]: Without dead ends: 60 [2022-07-19 09:57:56,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 90 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 09:57:56,961 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 129 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:57:56,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 19 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:57:56,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-19 09:57:56,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2022-07-19 09:57:56,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 states have internal predecessors, (60), 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 09:57:56,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2022-07-19 09:57:56,967 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 49 [2022-07-19 09:57:56,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:57:56,968 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2022-07-19 09:57:56,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:57:56,968 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2022-07-19 09:57:56,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-19 09:57:56,969 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:57:56,969 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-19 09:57:56,986 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 09:57:57,171 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 09:57:57,171 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:57:57,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:57:57,172 INFO L85 PathProgramCache]: Analyzing trace with hash -2047700076, now seen corresponding path program 9 times [2022-07-19 09:57:57,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:57:57,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934543526] [2022-07-19 09:57:57,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:57:57,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:57:57,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:57:59,526 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 1 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:57:59,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:57:59,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934543526] [2022-07-19 09:57:59,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934543526] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:57:59,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600888610] [2022-07-19 09:57:59,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 09:57:59,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:57:59,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:57:59,532 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 09:57:59,532 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 09:57:59,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-19 09:57:59,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:57:59,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 86 conjunts are in the unsatisfiable core [2022-07-19 09:57:59,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:57:59,654 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 09:58:04,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:58:04,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:58:04,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:58:04,832 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 09:58:04,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 145 [2022-07-19 09:58:05,225 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 5 proven. 71 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 09:58:05,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:58:13,773 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 09:58:13,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600888610] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:58:13,773 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:58:13,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 40, 36] total 114 [2022-07-19 09:58:13,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239097099] [2022-07-19 09:58:13,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:58:13,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-07-19 09:58:13,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:58:13,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-07-19 09:58:13,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=653, Invalid=12227, Unknown=2, NotChecked=0, Total=12882 [2022-07-19 09:58:13,777 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 114 states, 114 states have (on average 1.3070175438596492) internal successors, (149), 114 states have internal predecessors, (149), 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 09:58:21,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:58:21,265 INFO L93 Difference]: Finished difference Result 93 states and 100 transitions. [2022-07-19 09:58:21,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-19 09:58:21,266 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 1.3070175438596492) internal successors, (149), 114 states have internal predecessors, (149), 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 55 [2022-07-19 09:58:21,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:58:21,267 INFO L225 Difference]: With dead ends: 93 [2022-07-19 09:58:21,267 INFO L226 Difference]: Without dead ends: 89 [2022-07-19 09:58:21,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6604 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=1437, Invalid=25951, Unknown=2, NotChecked=0, Total=27390 [2022-07-19 09:58:21,270 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 24 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 1989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1088 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 09:58:21,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 190 Invalid, 1989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 822 Invalid, 0 Unknown, 1088 Unchecked, 0.5s Time] [2022-07-19 09:58:21,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-19 09:58:21,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 81. [2022-07-19 09:58:21,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 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 09:58:21,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2022-07-19 09:58:21,280 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 55 [2022-07-19 09:58:21,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:58:21,280 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2022-07-19 09:58:21,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 1.3070175438596492) internal successors, (149), 114 states have internal predecessors, (149), 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 09:58:21,281 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2022-07-19 09:58:21,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-19 09:58:21,282 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:58:21,282 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-19 09:58:21,301 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 09:58:21,490 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 09:58:21,490 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:58:21,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:58:21,491 INFO L85 PathProgramCache]: Analyzing trace with hash -691517258, now seen corresponding path program 10 times [2022-07-19 09:58:21,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:58:21,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232878914] [2022-07-19 09:58:21,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:58:21,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:58:21,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:58:21,580 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-19 09:58:21,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:58:21,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232878914] [2022-07-19 09:58:21,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232878914] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:58:21,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117089831] [2022-07-19 09:58:21,580 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 09:58:21,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:58:21,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:58:21,582 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 09:58:21,615 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 09:58:21,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 09:58:21,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:58:21,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-19 09:58:21,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:58:21,769 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-19 09:58:21,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:58:21,830 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-19 09:58:21,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117089831] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:58:21,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:58:21,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-07-19 09:58:21,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920203932] [2022-07-19 09:58:21,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:58:21,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 09:58:21,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:58:21,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 09:58:21,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-07-19 09:58:21,832 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 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 09:58:22,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:58:22,084 INFO L93 Difference]: Finished difference Result 177 states and 192 transitions. [2022-07-19 09:58:22,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 09:58:22,084 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 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 57 [2022-07-19 09:58:22,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:58:22,085 INFO L225 Difference]: With dead ends: 177 [2022-07-19 09:58:22,085 INFO L226 Difference]: Without dead ends: 100 [2022-07-19 09:58:22,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2022-07-19 09:58:22,085 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 140 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:58:22,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 38 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 09:58:22,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-19 09:58:22,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 84. [2022-07-19 09:58:22,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0843373493975903) internal successors, (90), 83 states have internal predecessors, (90), 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 09:58:22,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2022-07-19 09:58:22,095 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 57 [2022-07-19 09:58:22,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:58:22,096 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2022-07-19 09:58:22,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 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 09:58:22,096 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2022-07-19 09:58:22,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-19 09:58:22,097 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:58:22,097 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:58:22,117 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 09:58:22,311 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 09:58:22,311 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:58:22,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:58:22,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1701588072, now seen corresponding path program 11 times [2022-07-19 09:58:22,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:58:22,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371437184] [2022-07-19 09:58:22,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:58:22,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:58:22,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:58:22,418 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-19 09:58:22,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:58:22,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371437184] [2022-07-19 09:58:22,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371437184] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:58:22,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748381813] [2022-07-19 09:58:22,419 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 09:58:22,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:58:22,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:58:22,420 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 09:58:22,421 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 09:58:22,508 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-19 09:58:22,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:58:22,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-19 09:58:22,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:58:22,605 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-19 09:58:22,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:58:22,659 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-19 09:58:22,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748381813] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:58:22,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:58:22,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-07-19 09:58:22,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85674132] [2022-07-19 09:58:22,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:58:22,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 09:58:22,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:58:22,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 09:58:22,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-07-19 09:58:22,661 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 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 09:58:22,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:58:22,973 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2022-07-19 09:58:22,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-19 09:58:22,974 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 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 59 [2022-07-19 09:58:22,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:58:22,974 INFO L225 Difference]: With dead ends: 94 [2022-07-19 09:58:22,974 INFO L226 Difference]: Without dead ends: 70 [2022-07-19 09:58:22,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 109 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 09:58:22,975 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 100 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:58:22,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 41 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 09:58:22,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-19 09:58:22,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2022-07-19 09:58:22,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 states have internal predecessors, (70), 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 09:58:22,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2022-07-19 09:58:22,983 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 59 [2022-07-19 09:58:22,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:58:22,983 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2022-07-19 09:58:22,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 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 09:58:22,983 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2022-07-19 09:58:22,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-19 09:58:22,984 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:58:22,984 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-19 09:58:23,001 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 09:58:23,184 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 09:58:23,185 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:58:23,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:58:23,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1079638594, now seen corresponding path program 12 times [2022-07-19 09:58:23,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:58:23,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283104415] [2022-07-19 09:58:23,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:58:23,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:58:23,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:58:26,499 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 4 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:58:26,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:58:26,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283104415] [2022-07-19 09:58:26,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283104415] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:58:26,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191513144] [2022-07-19 09:58:26,499 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 09:58:26,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:58:26,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:58:26,501 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 09:58:26,505 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 09:58:26,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-19 09:58:26,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:58:26,568 WARN L261 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 102 conjunts are in the unsatisfiable core [2022-07-19 09:58:26,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:58:31,485 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 09:58:31,485 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 09:58:31,861 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 3 proven. 121 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 09:58:31,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:58:45,022 INFO L356 Elim1Store]: treesize reduction 387, result has 41.2 percent of original size [2022-07-19 09:58:45,022 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 09:58:45,738 INFO L356 Elim1Store]: treesize reduction 593, result has 9.9 percent of original size [2022-07-19 09:58:45,739 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 80 [2022-07-19 09:58:45,911 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-19 09:58:45,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191513144] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:58:45,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:58:45,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 50, 44] total 142 [2022-07-19 09:58:45,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192279353] [2022-07-19 09:58:45,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:58:45,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2022-07-19 09:58:45,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:58:45,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2022-07-19 09:58:45,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=19371, Unknown=0, NotChecked=0, Total=20022 [2022-07-19 09:58:45,914 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 142 states, 142 states have (on average 1.2535211267605635) internal successors, (178), 142 states have internal predecessors, (178), 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 09:58:55,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:58:55,628 INFO L93 Difference]: Finished difference Result 109 states and 116 transitions. [2022-07-19 09:58:55,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-07-19 09:58:55,628 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 1.2535211267605635) internal successors, (178), 142 states have internal predecessors, (178), 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 09:58:55,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:58:55,629 INFO L225 Difference]: With dead ends: 109 [2022-07-19 09:58:55,629 INFO L226 Difference]: Without dead ends: 105 [2022-07-19 09:58:55,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9597 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=1481, Invalid=38319, Unknown=0, NotChecked=0, Total=39800 [2022-07-19 09:58:55,633 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 26 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 2563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1549 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 09:58:55,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 229 Invalid, 2563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 949 Invalid, 0 Unknown, 1549 Unchecked, 0.5s Time] [2022-07-19 09:58:55,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-19 09:58:55,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 95. [2022-07-19 09:58:55,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0851063829787233) internal successors, (102), 94 states have internal predecessors, (102), 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 09:58:55,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2022-07-19 09:58:55,648 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 65 [2022-07-19 09:58:55,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:58:55,648 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2022-07-19 09:58:55,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 142 states, 142 states have (on average 1.2535211267605635) internal successors, (178), 142 states have internal predecessors, (178), 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 09:58:55,649 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2022-07-19 09:58:55,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-19 09:58:55,649 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:58:55,650 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:58:55,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-19 09:58:55,859 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 09:58:55,860 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:58:55,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:58:55,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1902631008, now seen corresponding path program 13 times [2022-07-19 09:58:55,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:58:55,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399497335] [2022-07-19 09:58:55,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:58:55,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:58:55,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:58:56,006 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-19 09:58:56,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:58:56,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399497335] [2022-07-19 09:58:56,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399497335] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:58:56,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555926031] [2022-07-19 09:58:56,007 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 09:58:56,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:58:56,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:58:56,009 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 09:58:56,010 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 09:58:56,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:58:56,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-19 09:58:56,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:58:56,243 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-19 09:58:56,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:58:56,318 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-19 09:58:56,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555926031] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:58:56,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:58:56,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-07-19 09:58:56,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144408606] [2022-07-19 09:58:56,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:58:56,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-19 09:58:56,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:58:56,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-19 09:58:56,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2022-07-19 09:58:56,320 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 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 09:58:56,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:58:56,606 INFO L93 Difference]: Finished difference Result 205 states and 220 transitions. [2022-07-19 09:58:56,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-19 09:58:56,606 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 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 67 [2022-07-19 09:58:56,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:58:56,607 INFO L225 Difference]: With dead ends: 205 [2022-07-19 09:58:56,607 INFO L226 Difference]: Without dead ends: 114 [2022-07-19 09:58:56,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 125 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 09:58:56,608 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 136 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:58:56,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 46 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 09:58:56,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-07-19 09:58:56,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 98. [2022-07-19 09:58:56,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.0721649484536082) internal successors, (104), 97 states have internal predecessors, (104), 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 09:58:56,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 104 transitions. [2022-07-19 09:58:56,623 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 104 transitions. Word has length 67 [2022-07-19 09:58:56,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:58:56,623 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 104 transitions. [2022-07-19 09:58:56,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 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 09:58:56,624 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 104 transitions. [2022-07-19 09:58:56,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-19 09:58:56,624 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:58:56,624 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:58:56,641 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 09:58:56,824 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 09:58:56,825 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:58:56,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:58:56,825 INFO L85 PathProgramCache]: Analyzing trace with hash 2014257346, now seen corresponding path program 14 times [2022-07-19 09:58:56,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:58:56,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721653937] [2022-07-19 09:58:56,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:58:56,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:58:56,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:58:56,940 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-19 09:58:56,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:58:56,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721653937] [2022-07-19 09:58:56,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721653937] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:58:56,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64688476] [2022-07-19 09:58:56,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:58:56,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:58:56,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:58:56,943 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 09:58:56,970 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 09:58:57,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:58:57,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:58:57,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-19 09:58:57,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:58:57,163 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-19 09:58:57,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:58:57,239 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-19 09:58:57,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64688476] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:58:57,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:58:57,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-07-19 09:58:57,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094855602] [2022-07-19 09:58:57,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:58:57,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-19 09:58:57,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:58:57,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-19 09:58:57,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2022-07-19 09:58:57,241 INFO L87 Difference]: Start difference. First operand 98 states and 104 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 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 09:58:57,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:58:57,572 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2022-07-19 09:58:57,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-19 09:58:57,573 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 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 69 [2022-07-19 09:58:57,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:58:57,573 INFO L225 Difference]: With dead ends: 108 [2022-07-19 09:58:57,574 INFO L226 Difference]: Without dead ends: 80 [2022-07-19 09:58:57,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=275, Invalid=915, Unknown=0, NotChecked=0, Total=1190 [2022-07-19 09:58:57,574 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 142 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:58:57,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 20 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 09:58:57,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-19 09:58:57,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2022-07-19 09:58:57,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 75 states have internal predecessors, (80), 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 09:58:57,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2022-07-19 09:58:57,584 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 69 [2022-07-19 09:58:57,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:58:57,585 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2022-07-19 09:58:57,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 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 09:58:57,585 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2022-07-19 09:58:57,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-19 09:58:57,585 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:58:57,585 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-19 09:58:57,604 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 09:58:57,786 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 09:58:57,786 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:58:57,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:58:57,786 INFO L85 PathProgramCache]: Analyzing trace with hash 209029992, now seen corresponding path program 15 times [2022-07-19 09:58:57,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:58:57,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384220748] [2022-07-19 09:58:57,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:58:57,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:58:57,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:59:02,654 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 4 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:59:02,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:59:02,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384220748] [2022-07-19 09:59:02,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384220748] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:59:02,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998869162] [2022-07-19 09:59:02,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 09:59:02,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:59:02,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:59:02,657 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 09:59:02,657 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 09:59:02,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-19 09:59:02,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:59:02,734 WARN L261 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 122 conjunts are in the unsatisfiable core [2022-07-19 09:59:02,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:59:02,826 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 09:59:12,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:59:12,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:59:12,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:59:12,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:59:12,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:59:12,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:59:12,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:59:12,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:59:12,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:59:12,997 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 09:59:12,998 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 58 treesize of output 103 [2022-07-19 09:59:13,453 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 7 proven. 164 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 09:59:13,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:59:33,442 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-19 09:59:33,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998869162] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:59:33,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:59:33,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 57, 52] total 167 [2022-07-19 09:59:33,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000559249] [2022-07-19 09:59:33,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:59:33,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 167 states [2022-07-19 09:59:33,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:59:33,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2022-07-19 09:59:33,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1071, Invalid=26649, Unknown=2, NotChecked=0, Total=27722 [2022-07-19 09:59:33,446 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 167 states, 167 states have (on average 1.2095808383233533) internal successors, (202), 167 states have internal predecessors, (202), 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 09:59:51,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:59:51,079 INFO L93 Difference]: Finished difference Result 124 states and 131 transitions. [2022-07-19 09:59:51,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-07-19 09:59:51,079 INFO L78 Accepts]: Start accepts. Automaton has has 167 states, 167 states have (on average 1.2095808383233533) internal successors, (202), 167 states have internal predecessors, (202), 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 09:59:51,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:59:51,080 INFO L225 Difference]: With dead ends: 124 [2022-07-19 09:59:51,080 INFO L226 Difference]: Without dead ends: 120 [2022-07-19 09:59:51,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 44 SyntacticMatches, 8 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14216 ImplicationChecksByTransitivity, 45.6s TimeCoverageRelationStatistics Valid=2378, Invalid=54026, Unknown=2, NotChecked=0, Total=56406 [2022-07-19 09:59:51,083 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 42 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 2726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1560 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 09:59:51,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 259 Invalid, 2726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1080 Invalid, 0 Unknown, 1560 Unchecked, 0.7s Time] [2022-07-19 09:59:51,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-19 09:59:51,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 109. [2022-07-19 09:59:51,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0740740740740742) internal successors, (116), 108 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 09:59:51,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 116 transitions. [2022-07-19 09:59:51,100 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 116 transitions. Word has length 75 [2022-07-19 09:59:51,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:59:51,101 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 116 transitions. [2022-07-19 09:59:51,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 167 states, 167 states have (on average 1.2095808383233533) internal successors, (202), 167 states have internal predecessors, (202), 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 09:59:51,101 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 116 transitions. [2022-07-19 09:59:51,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-19 09:59:51,101 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:59:51,101 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-19 09:59:51,118 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 09:59:51,302 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 09:59:51,302 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:59:51,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:59:51,302 INFO L85 PathProgramCache]: Analyzing trace with hash -932406390, now seen corresponding path program 16 times [2022-07-19 09:59:51,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:59:51,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430291005] [2022-07-19 09:59:51,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:59:51,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:59:51,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:59:51,440 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-19 09:59:51,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:59:51,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430291005] [2022-07-19 09:59:51,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430291005] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:59:51,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118701124] [2022-07-19 09:59:51,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 09:59:51,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:59:51,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:59:51,444 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 09:59:51,447 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 09:59:51,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 09:59:51,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:59:51,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 09:59:51,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:59:51,688 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-19 09:59:51,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:59:51,767 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-19 09:59:51,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118701124] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:59:51,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:59:51,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2022-07-19 09:59:51,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394816200] [2022-07-19 09:59:51,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:59:51,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-19 09:59:51,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:59:51,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-19 09:59:51,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2022-07-19 09:59:51,769 INFO L87 Difference]: Start difference. First operand 109 states and 116 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 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 09:59:52,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:59:52,081 INFO L93 Difference]: Finished difference Result 233 states and 248 transitions. [2022-07-19 09:59:52,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-19 09:59:52,082 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 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 09:59:52,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:59:52,082 INFO L225 Difference]: With dead ends: 233 [2022-07-19 09:59:52,083 INFO L226 Difference]: Without dead ends: 128 [2022-07-19 09:59:52,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 144 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 09:59:52,084 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 247 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:59:52,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 34 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 09:59:52,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-07-19 09:59:52,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 112. [2022-07-19 09:59:52,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.063063063063063) internal successors, (118), 111 states have internal predecessors, (118), 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 09:59:52,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 118 transitions. [2022-07-19 09:59:52,100 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 118 transitions. Word has length 77 [2022-07-19 09:59:52,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:59:52,100 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 118 transitions. [2022-07-19 09:59:52,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 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 09:59:52,100 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 118 transitions. [2022-07-19 09:59:52,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-19 09:59:52,101 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:59:52,101 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:59:52,121 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 09:59:52,317 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 09:59:52,318 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:59:52,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:59:52,318 INFO L85 PathProgramCache]: Analyzing trace with hash -222248596, now seen corresponding path program 17 times [2022-07-19 09:59:52,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:59:52,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154628414] [2022-07-19 09:59:52,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:59:52,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:59:52,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:59:52,445 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-07-19 09:59:52,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:59:52,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154628414] [2022-07-19 09:59:52,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154628414] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:59:52,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788828343] [2022-07-19 09:59:52,445 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 09:59:52,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:59:52,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:59:52,447 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 09:59:52,448 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 09:59:52,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-19 09:59:52,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:59:52,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 09:59:52,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:59:52,764 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-07-19 09:59:52,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:59:52,849 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-07-19 09:59:52,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788828343] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:59:52,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:59:52,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2022-07-19 09:59:52,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599462326] [2022-07-19 09:59:52,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:59:52,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-19 09:59:52,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:59:52,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-19 09:59:52,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2022-07-19 09:59:52,850 INFO L87 Difference]: Start difference. First operand 112 states and 118 transitions. Second operand has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 26 states have internal predecessors, (86), 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 09:59:53,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:59:53,174 INFO L93 Difference]: Finished difference Result 122 states and 128 transitions. [2022-07-19 09:59:53,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-19 09:59:53,175 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 26 states have internal predecessors, (86), 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 79 [2022-07-19 09:59:53,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:59:53,175 INFO L225 Difference]: With dead ends: 122 [2022-07-19 09:59:53,175 INFO L226 Difference]: Without dead ends: 90 [2022-07-19 09:59:53,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 147 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 09:59:53,176 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 208 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:59:53,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 21 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 09:59:53,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-19 09:59:53,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2022-07-19 09:59:53,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0588235294117647) internal successors, (90), 85 states have internal predecessors, (90), 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 09:59:53,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2022-07-19 09:59:53,188 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 79 [2022-07-19 09:59:53,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:59:53,188 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2022-07-19 09:59:53,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 26 states have internal predecessors, (86), 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 09:59:53,188 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2022-07-19 09:59:53,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-19 09:59:53,188 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:59:53,189 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-19 09:59:53,212 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 09:59:53,411 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 09:59:53,412 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:59:53,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:59:53,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1053375342, now seen corresponding path program 18 times [2022-07-19 09:59:53,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:59:53,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203513250] [2022-07-19 09:59:53,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:59:53,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:59:53,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:59:59,370 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 1 proven. 244 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:59:59,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:59:59,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203513250] [2022-07-19 09:59:59,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203513250] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:59:59,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111078221] [2022-07-19 09:59:59,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 09:59:59,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:59:59,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:59:59,371 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 09:59:59,372 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 09:59:59,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-19 09:59:59,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:59:59,514 WARN L261 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 140 conjunts are in the unsatisfiable core [2022-07-19 09:59:59,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:59:59,613 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 10:00:14,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:14,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:14,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:14,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:14,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:14,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:14,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:14,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:14,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:14,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:14,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:14,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:14,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:14,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:14,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:14,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:14,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:14,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:14,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:14,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:14,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:14,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:14,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:14,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:14,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:14,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:14,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:14,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:14,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:14,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:14,771 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 10:00:14,771 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 98 treesize of output 251 [2022-07-19 10:00:15,396 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 11 proven. 209 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-19 10:00:15,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:00:49,482 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-19 10:00:49,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111078221] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:00:49,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:00:49,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 64, 60] total 191 [2022-07-19 10:00:49,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842727033] [2022-07-19 10:00:49,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:00:49,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 191 states [2022-07-19 10:00:49,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:00:49,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 191 interpolants. [2022-07-19 10:00:49,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1244, Invalid=35046, Unknown=0, NotChecked=0, Total=36290 [2022-07-19 10:00:49,486 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand has 191 states, 191 states have (on average 1.1884816753926701) internal successors, (227), 191 states have internal predecessors, (227), 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 10:01:23,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:01:23,167 INFO L93 Difference]: Finished difference Result 141 states and 148 transitions. [2022-07-19 10:01:23,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-07-19 10:01:23,168 INFO L78 Accepts]: Start accepts. Automaton has has 191 states, 191 states have (on average 1.1884816753926701) internal successors, (227), 191 states have internal predecessors, (227), 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 85 [2022-07-19 10:01:23,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:01:23,168 INFO L225 Difference]: With dead ends: 141 [2022-07-19 10:01:23,168 INFO L226 Difference]: Without dead ends: 137 [2022-07-19 10:01:23,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 51 SyntacticMatches, 7 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13850 ImplicationChecksByTransitivity, 80.8s TimeCoverageRelationStatistics Valid=2768, Invalid=70944, Unknown=0, NotChecked=0, Total=73712 [2022-07-19 10:01:23,172 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 62 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 1519 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 3674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2049 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 10:01:23,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 271 Invalid, 3674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1519 Invalid, 0 Unknown, 2049 Unchecked, 0.9s Time] [2022-07-19 10:01:23,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-07-19 10:01:23,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 123. [2022-07-19 10:01:23,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.0655737704918034) internal successors, (130), 122 states have internal predecessors, (130), 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 10:01:23,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 130 transitions. [2022-07-19 10:01:23,196 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 130 transitions. Word has length 85 [2022-07-19 10:01:23,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:01:23,196 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 130 transitions. [2022-07-19 10:01:23,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 191 states, 191 states have (on average 1.1884816753926701) internal successors, (227), 191 states have internal predecessors, (227), 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 10:01:23,197 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 130 transitions. [2022-07-19 10:01:23,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-19 10:01:23,198 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:01:23,198 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:01:23,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-07-19 10:01:23,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:01:23,405 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:01:23,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:01:23,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1371812404, now seen corresponding path program 19 times [2022-07-19 10:01:23,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:01:23,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124763950] [2022-07-19 10:01:23,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:01:23,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:01:23,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:01:23,565 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-19 10:01:23,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:01:23,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124763950] [2022-07-19 10:01:23,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124763950] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:01:23,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077791810] [2022-07-19 10:01:23,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 10:01:23,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:01:23,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:01:23,568 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:01:23,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-19 10:01:23,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:01:23,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-19 10:01:23,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:01:23,903 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-19 10:01:23,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:01:23,990 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-19 10:01:23,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077791810] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:01:23,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:01:23,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2022-07-19 10:01:23,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118442004] [2022-07-19 10:01:23,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:01:23,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-19 10:01:23,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:01:23,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-19 10:01:23,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2022-07-19 10:01:23,992 INFO L87 Difference]: Start difference. First operand 123 states and 130 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 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 10:01:24,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:01:24,367 INFO L93 Difference]: Finished difference Result 261 states and 276 transitions. [2022-07-19 10:01:24,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 10:01:24,369 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 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 87 [2022-07-19 10:01:24,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:01:24,370 INFO L225 Difference]: With dead ends: 261 [2022-07-19 10:01:24,370 INFO L226 Difference]: Without dead ends: 142 [2022-07-19 10:01:24,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2022-07-19 10:01:24,371 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 244 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:01:24,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 38 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 10:01:24,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-07-19 10:01:24,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 126. [2022-07-19 10:01:24,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.056) internal successors, (132), 125 states have internal predecessors, (132), 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 10:01:24,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 132 transitions. [2022-07-19 10:01:24,402 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 132 transitions. Word has length 87 [2022-07-19 10:01:24,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:01:24,402 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 132 transitions. [2022-07-19 10:01:24,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 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 10:01:24,403 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 132 transitions. [2022-07-19 10:01:24,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-19 10:01:24,403 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:01:24,403 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:01:24,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-19 10:01:24,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:01:24,604 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:01:24,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:01:24,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1135498646, now seen corresponding path program 20 times [2022-07-19 10:01:24,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:01:24,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159251250] [2022-07-19 10:01:24,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:01:24,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:01:24,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:01:24,774 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-07-19 10:01:24,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:01:24,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159251250] [2022-07-19 10:01:24,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159251250] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:01:24,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352671067] [2022-07-19 10:01:24,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:01:24,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:01:24,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:01:24,780 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:01:24,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-19 10:01:24,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 10:01:24,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:01:24,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-19 10:01:24,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:01:25,059 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-07-19 10:01:25,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:01:25,133 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-07-19 10:01:25,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352671067] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:01:25,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:01:25,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2022-07-19 10:01:25,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674576171] [2022-07-19 10:01:25,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:01:25,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-19 10:01:25,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:01:25,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-19 10:01:25,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2022-07-19 10:01:25,137 INFO L87 Difference]: Start difference. First operand 126 states and 132 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 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 10:01:25,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:01:25,678 INFO L93 Difference]: Finished difference Result 136 states and 142 transitions. [2022-07-19 10:01:25,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-19 10:01:25,678 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 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 10:01:25,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:01:25,679 INFO L225 Difference]: With dead ends: 136 [2022-07-19 10:01:25,679 INFO L226 Difference]: Without dead ends: 100 [2022-07-19 10:01:25,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 166 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=441, Invalid=1539, Unknown=0, NotChecked=0, Total=1980 [2022-07-19 10:01:25,680 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 178 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:01:25,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 29 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 10:01:25,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-19 10:01:25,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2022-07-19 10:01:25,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0526315789473684) internal successors, (100), 95 states have internal predecessors, (100), 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 10:01:25,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2022-07-19 10:01:25,702 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 89 [2022-07-19 10:01:25,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:01:25,703 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2022-07-19 10:01:25,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 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 10:01:25,703 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2022-07-19 10:01:25,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-19 10:01:25,703 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:01:25,704 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:01:25,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-19 10:01:25,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-19 10:01:25,919 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:01:25,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:01:25,920 INFO L85 PathProgramCache]: Analyzing trace with hash 238506300, now seen corresponding path program 21 times [2022-07-19 10:01:25,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:01:25,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876846008] [2022-07-19 10:01:25,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:01:25,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:01:26,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:01:33,924 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 16 proven. 304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:01:33,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:01:33,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876846008] [2022-07-19 10:01:33,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876846008] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:01:33,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295492691] [2022-07-19 10:01:33,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 10:01:33,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:01:33,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:01:33,926 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:01:33,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-19 10:01:34,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-19 10:01:34,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:01:34,056 WARN L261 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 158 conjunts are in the unsatisfiable core [2022-07-19 10:01:34,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:01:34,309 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