./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array15_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-patterns/array15_pattern.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 511c1484167d1d7d90ff27dae8a1569edd7c5a72fd917e4f05baeab770e0fcd4 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 08:19:43,311 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 08:19:43,313 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 08:19:43,358 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 08:19:43,363 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 08:19:43,364 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 08:19:43,365 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 08:19:43,367 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 08:19:43,368 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 08:19:43,369 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 08:19:43,369 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 08:19:43,370 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 08:19:43,370 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 08:19:43,371 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 08:19:43,372 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 08:19:43,372 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 08:19:43,373 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 08:19:43,374 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 08:19:43,375 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 08:19:43,376 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 08:19:43,377 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 08:19:43,378 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 08:19:43,378 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 08:19:43,379 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 08:19:43,381 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 08:19:43,381 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 08:19:43,381 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 08:19:43,382 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 08:19:43,382 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 08:19:43,383 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 08:19:43,383 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 08:19:43,384 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 08:19:43,384 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 08:19:43,385 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 08:19:43,385 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 08:19:43,386 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 08:19:43,386 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 08:19:43,386 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 08:19:43,386 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 08:19:43,387 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 08:19:43,387 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 08:19:43,403 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 08:19:43,430 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 08:19:43,430 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 08:19:43,430 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 08:19:43,430 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 08:19:43,431 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 08:19:43,431 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 08:19:43,431 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 08:19:43,432 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 08:19:43,432 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 08:19:43,432 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 08:19:43,432 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 08:19:43,432 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 08:19:43,432 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 08:19:43,432 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 08:19:43,432 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 08:19:43,433 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 08:19:43,433 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 08:19:43,433 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 08:19:43,433 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 08:19:43,433 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 08:19:43,433 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 08:19:43,433 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 08:19:43,434 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 08:19:43,434 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 08:19:43,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 08:19:43,434 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 08:19:43,434 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 08:19:43,434 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 08:19:43,434 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 08:19:43,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 08:19:43,435 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 08:19:43,435 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 08:19:43,435 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 08:19:43,435 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 08:19:43,435 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 511c1484167d1d7d90ff27dae8a1569edd7c5a72fd917e4f05baeab770e0fcd4 [2021-12-22 08:19:43,615 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 08:19:43,631 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 08:19:43,634 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 08:19:43,635 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 08:19:43,635 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 08:19:43,636 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array15_pattern.c [2021-12-22 08:19:43,676 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2a446bdf/60a3bd9505ab49048a3dda990554e320/FLAG26dfd8f94 [2021-12-22 08:19:44,040 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 08:19:44,041 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array15_pattern.c [2021-12-22 08:19:44,045 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2a446bdf/60a3bd9505ab49048a3dda990554e320/FLAG26dfd8f94 [2021-12-22 08:19:44,468 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2a446bdf/60a3bd9505ab49048a3dda990554e320 [2021-12-22 08:19:44,470 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 08:19:44,471 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 08:19:44,472 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 08:19:44,472 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 08:19:44,474 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 08:19:44,475 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:19:44" (1/1) ... [2021-12-22 08:19:44,475 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e50a440 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:44, skipping insertion in model container [2021-12-22 08:19:44,476 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:19:44" (1/1) ... [2021-12-22 08:19:44,486 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 08:19:44,499 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 08:19:44,610 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array15_pattern.c[1424,1437] [2021-12-22 08:19:44,622 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 08:19:44,626 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 08:19:44,633 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array15_pattern.c[1424,1437] [2021-12-22 08:19:44,639 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 08:19:44,647 INFO L208 MainTranslator]: Completed translation [2021-12-22 08:19:44,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:44 WrapperNode [2021-12-22 08:19:44,647 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 08:19:44,648 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 08:19:44,648 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 08:19:44,648 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 08:19:44,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:44" (1/1) ... [2021-12-22 08:19:44,657 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:44" (1/1) ... [2021-12-22 08:19:44,678 INFO L137 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 96 [2021-12-22 08:19:44,679 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 08:19:44,680 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 08:19:44,680 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 08:19:44,680 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 08:19:44,685 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:44" (1/1) ... [2021-12-22 08:19:44,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:44" (1/1) ... [2021-12-22 08:19:44,698 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:44" (1/1) ... [2021-12-22 08:19:44,699 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:44" (1/1) ... [2021-12-22 08:19:44,704 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:44" (1/1) ... [2021-12-22 08:19:44,710 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:44" (1/1) ... [2021-12-22 08:19:44,712 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:44" (1/1) ... [2021-12-22 08:19:44,717 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 08:19:44,719 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 08:19:44,720 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 08:19:44,720 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 08:19:44,721 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:44" (1/1) ... [2021-12-22 08:19:44,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 08:19:44,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:19:44,742 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 08:19:44,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 08:19:44,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 08:19:44,779 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-22 08:19:44,779 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-22 08:19:44,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 08:19:44,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 08:19:44,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 08:19:44,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 08:19:44,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 08:19:44,780 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 08:19:44,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 08:19:44,824 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 08:19:44,825 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 08:19:44,945 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 08:19:44,949 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 08:19:44,949 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-22 08:19:44,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:19:44 BoogieIcfgContainer [2021-12-22 08:19:44,950 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 08:19:44,952 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 08:19:44,952 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 08:19:44,955 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 08:19:44,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:19:44" (1/3) ... [2021-12-22 08:19:44,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16aaa4df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:19:44, skipping insertion in model container [2021-12-22 08:19:44,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:44" (2/3) ... [2021-12-22 08:19:44,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16aaa4df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:19:44, skipping insertion in model container [2021-12-22 08:19:44,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:19:44" (3/3) ... [2021-12-22 08:19:44,957 INFO L111 eAbstractionObserver]: Analyzing ICFG array15_pattern.c [2021-12-22 08:19:44,960 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 08:19:44,960 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 08:19:45,007 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 08:19:45,016 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 08:19:45,016 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 08:19:45,029 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 27 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 08:19:45,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-22 08:19:45,034 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:19:45,034 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:19:45,035 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:19:45,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:19:45,038 INFO L85 PathProgramCache]: Analyzing trace with hash 179087049, now seen corresponding path program 1 times [2021-12-22 08:19:45,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:19:45,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180990697] [2021-12-22 08:19:45,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:19:45,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:19:45,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:19:45,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:19:45,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:19:45,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:19:45,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:19:45,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180990697] [2021-12-22 08:19:45,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180990697] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:19:45,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:19:45,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 08:19:45,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884831546] [2021-12-22 08:19:45,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:19:45,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 08:19:45,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:19:45,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 08:19:45,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 08:19:45,185 INFO L87 Difference]: Start difference. First operand has 32 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 27 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 08:19:45,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:19:45,206 INFO L93 Difference]: Finished difference Result 61 states and 93 transitions. [2021-12-22 08:19:45,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 08:19:45,207 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-12-22 08:19:45,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:19:45,221 INFO L225 Difference]: With dead ends: 61 [2021-12-22 08:19:45,222 INFO L226 Difference]: Without dead ends: 28 [2021-12-22 08:19:45,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 08:19:45,230 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:19:45,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:19:45,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-22 08:19:45,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-12-22 08:19:45,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 08:19:45,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2021-12-22 08:19:45,262 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 15 [2021-12-22 08:19:45,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:19:45,263 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2021-12-22 08:19:45,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 08:19:45,263 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2021-12-22 08:19:45,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-22 08:19:45,264 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:19:45,265 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:19:45,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 08:19:45,265 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:19:45,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:19:45,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1195633489, now seen corresponding path program 1 times [2021-12-22 08:19:45,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:19:45,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991600863] [2021-12-22 08:19:45,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:19:45,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:19:45,279 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 08:19:45,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [335446393] [2021-12-22 08:19:45,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:19:45,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:19:45,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:19:45,299 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 08:19:45,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 08:19:45,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:19:45,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 08:19:45,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:19:45,518 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 08:19:45,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 08:19:45,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:19:45,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991600863] [2021-12-22 08:19:45,519 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 08:19:45,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335446393] [2021-12-22 08:19:45,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335446393] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:19:45,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:19:45,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 08:19:45,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156545994] [2021-12-22 08:19:45,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:19:45,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 08:19:45,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:19:45,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 08:19:45,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 08:19:45,522 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-22 08:19:45,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:19:45,599 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2021-12-22 08:19:45,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 08:19:45,599 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-12-22 08:19:45,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:19:45,600 INFO L225 Difference]: With dead ends: 60 [2021-12-22 08:19:45,600 INFO L226 Difference]: Without dead ends: 40 [2021-12-22 08:19:45,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-22 08:19:45,602 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 47 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:19:45,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 53 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 08:19:45,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-22 08:19:45,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2021-12-22 08:19:45,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 08:19:45,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-12-22 08:19:45,608 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 29 [2021-12-22 08:19:45,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:19:45,609 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-12-22 08:19:45,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-22 08:19:45,609 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-12-22 08:19:45,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-22 08:19:45,610 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:19:45,610 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:19:45,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-22 08:19:45,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:19:45,827 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:19:45,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:19:45,828 INFO L85 PathProgramCache]: Analyzing trace with hash -712222617, now seen corresponding path program 1 times [2021-12-22 08:19:45,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:19:45,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375978625] [2021-12-22 08:19:45,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:19:45,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:19:45,852 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 08:19:45,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [548366742] [2021-12-22 08:19:45,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:19:45,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:19:45,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:19:45,858 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 08:19:45,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 08:19:45,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:19:45,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 08:19:45,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:19:45,982 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 08:19:45,982 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 08:19:45,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:19:45,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375978625] [2021-12-22 08:19:45,983 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 08:19:45,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548366742] [2021-12-22 08:19:45,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548366742] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:19:45,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:19:45,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 08:19:45,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377048860] [2021-12-22 08:19:45,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:19:45,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 08:19:45,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:19:45,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 08:19:45,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 08:19:45,987 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-22 08:19:46,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:19:46,037 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2021-12-22 08:19:46,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 08:19:46,037 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2021-12-22 08:19:46,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:19:46,040 INFO L225 Difference]: With dead ends: 63 [2021-12-22 08:19:46,040 INFO L226 Difference]: Without dead ends: 38 [2021-12-22 08:19:46,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 08:19:46,042 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 24 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:19:46,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 49 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:19:46,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-22 08:19:46,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2021-12-22 08:19:46,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 08:19:46,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-12-22 08:19:46,055 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 35 [2021-12-22 08:19:46,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:19:46,055 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-12-22 08:19:46,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-22 08:19:46,055 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-12-22 08:19:46,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-22 08:19:46,056 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:19:46,057 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:19:46,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-22 08:19:46,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-22 08:19:46,273 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:19:46,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:19:46,274 INFO L85 PathProgramCache]: Analyzing trace with hash -459431893, now seen corresponding path program 1 times [2021-12-22 08:19:46,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:19:46,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919782070] [2021-12-22 08:19:46,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:19:46,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:19:46,288 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 08:19:46,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [173967624] [2021-12-22 08:19:46,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:19:46,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:19:46,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:19:46,300 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 08:19:46,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 08:19:46,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:19:46,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-22 08:19:46,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:19:46,543 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 08:19:46,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:19:46,816 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 08:19:46,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:19:46,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919782070] [2021-12-22 08:19:46,816 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 08:19:46,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173967624] [2021-12-22 08:19:46,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173967624] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:19:46,817 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 08:19:46,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-12-22 08:19:46,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401118255] [2021-12-22 08:19:46,817 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 08:19:46,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-22 08:19:46,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:19:46,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-22 08:19:46,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-12-22 08:19:46,819 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 20 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-22 08:19:47,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:19:47,146 INFO L93 Difference]: Finished difference Result 107 states and 126 transitions. [2021-12-22 08:19:47,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-22 08:19:47,147 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 39 [2021-12-22 08:19:47,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:19:47,149 INFO L225 Difference]: With dead ends: 107 [2021-12-22 08:19:47,149 INFO L226 Difference]: Without dead ends: 85 [2021-12-22 08:19:47,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-12-22 08:19:47,150 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 113 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 08:19:47,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 163 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 08:19:47,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-22 08:19:47,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 60. [2021-12-22 08:19:47,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 50 states have internal predecessors, (59), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-22 08:19:47,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2021-12-22 08:19:47,159 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 39 [2021-12-22 08:19:47,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:19:47,159 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2021-12-22 08:19:47,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-22 08:19:47,159 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2021-12-22 08:19:47,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-22 08:19:47,160 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:19:47,160 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:19:47,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 08:19:47,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:19:47,389 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:19:47,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:19:47,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1046237907, now seen corresponding path program 1 times [2021-12-22 08:19:47,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:19:47,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130234764] [2021-12-22 08:19:47,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:19:47,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:19:47,399 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 08:19:47,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [312986749] [2021-12-22 08:19:47,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:19:47,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:19:47,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:19:47,428 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 08:19:47,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 08:19:47,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:19:47,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-22 08:19:47,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:19:47,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 32 [2021-12-22 08:19:47,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2021-12-22 08:19:47,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 109 [2021-12-22 08:19:47,784 INFO L353 Elim1Store]: treesize reduction 248, result has 27.3 percent of original size [2021-12-22 08:19:47,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 108 treesize of output 174 [2021-12-22 08:19:47,828 INFO L353 Elim1Store]: treesize reduction 34, result has 53.4 percent of original size [2021-12-22 08:19:47,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 125 treesize of output 107 [2021-12-22 08:19:47,909 INFO L353 Elim1Store]: treesize reduction 53, result has 27.4 percent of original size [2021-12-22 08:19:47,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 117 treesize of output 94 [2021-12-22 08:19:48,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2021-12-22 08:19:48,221 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 08:19:48,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:19:48,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 52 [2021-12-22 08:19:48,565 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 08:19:48,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 59 [2021-12-22 08:19:48,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 17 [2021-12-22 08:19:48,607 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 08:19:48,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 43 treesize of output 47 [2021-12-22 08:19:48,634 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 08:19:48,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 80 treesize of output 71 [2021-12-22 08:19:49,060 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-22 08:19:49,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:19:49,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130234764] [2021-12-22 08:19:49,061 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 08:19:49,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312986749] [2021-12-22 08:19:49,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312986749] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:19:49,061 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 08:19:49,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-12-22 08:19:49,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834094724] [2021-12-22 08:19:49,061 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 08:19:49,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-22 08:19:49,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:19:49,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-22 08:19:49,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-12-22 08:19:49,062 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-22 08:19:50,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:19:50,116 INFO L93 Difference]: Finished difference Result 92 states and 109 transitions. [2021-12-22 08:19:50,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 08:19:50,116 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), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 39 [2021-12-22 08:19:50,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:19:50,118 INFO L225 Difference]: With dead ends: 92 [2021-12-22 08:19:50,118 INFO L226 Difference]: Without dead ends: 88 [2021-12-22 08:19:50,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 55 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-12-22 08:19:50,118 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 34 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:19:50,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 218 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 257 Invalid, 0 Unknown, 64 Unchecked, 1.0s Time] [2021-12-22 08:19:50,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-12-22 08:19:50,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 77. [2021-12-22 08:19:50,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 64 states have internal predecessors, (76), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-22 08:19:50,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 92 transitions. [2021-12-22 08:19:50,132 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 92 transitions. Word has length 39 [2021-12-22 08:19:50,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:19:50,133 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 92 transitions. [2021-12-22 08:19:50,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-22 08:19:50,134 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 92 transitions. [2021-12-22 08:19:50,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-22 08:19:50,151 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:19:50,151 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:19:50,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 08:19:50,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:19:50,368 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:19:50,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:19:50,368 INFO L85 PathProgramCache]: Analyzing trace with hash -252023569, now seen corresponding path program 2 times [2021-12-22 08:19:50,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:19:50,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848449138] [2021-12-22 08:19:50,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:19:50,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:19:50,377 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 08:19:50,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1217605633] [2021-12-22 08:19:50,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 08:19:50,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:19:50,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:19:50,379 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 08:19:50,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 08:19:50,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 08:19:50,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:19:50,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 08:19:50,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:19:50,500 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 08:19:50,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:19:50,557 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-22 08:19:50,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:19:50,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848449138] [2021-12-22 08:19:50,558 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 08:19:50,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217605633] [2021-12-22 08:19:50,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217605633] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:19:50,558 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 08:19:50,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-12-22 08:19:50,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774593775] [2021-12-22 08:19:50,558 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 08:19:50,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 08:19:50,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:19:50,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 08:19:50,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-22 08:19:50,559 INFO L87 Difference]: Start difference. First operand 77 states and 92 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 08:19:50,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:19:50,662 INFO L93 Difference]: Finished difference Result 155 states and 184 transitions. [2021-12-22 08:19:50,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 08:19:50,663 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2021-12-22 08:19:50,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:19:50,664 INFO L225 Difference]: With dead ends: 155 [2021-12-22 08:19:50,664 INFO L226 Difference]: Without dead ends: 117 [2021-12-22 08:19:50,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-12-22 08:19:50,664 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 140 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:19:50,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 101 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 08:19:50,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-22 08:19:50,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 90. [2021-12-22 08:19:50,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 76 states have (on average 1.1842105263157894) internal successors, (90), 77 states have internal predecessors, (90), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-22 08:19:50,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 106 transitions. [2021-12-22 08:19:50,684 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 106 transitions. Word has length 41 [2021-12-22 08:19:50,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:19:50,684 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 106 transitions. [2021-12-22 08:19:50,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 08:19:50,685 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 106 transitions. [2021-12-22 08:19:50,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-22 08:19:50,685 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:19:50,686 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:19:50,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 08:19:50,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:19:50,905 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:19:50,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:19:50,905 INFO L85 PathProgramCache]: Analyzing trace with hash 796161581, now seen corresponding path program 2 times [2021-12-22 08:19:50,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:19:50,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766748483] [2021-12-22 08:19:50,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:19:50,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:19:50,914 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 08:19:50,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1353000551] [2021-12-22 08:19:50,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 08:19:50,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:19:50,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:19:50,931 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 08:19:50,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 08:19:50,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 08:19:50,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:19:50,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 08:19:50,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:19:51,059 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 08:19:51,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:19:51,125 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-22 08:19:51,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:19:51,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766748483] [2021-12-22 08:19:51,126 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 08:19:51,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353000551] [2021-12-22 08:19:51,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353000551] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:19:51,126 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 08:19:51,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-12-22 08:19:51,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88450194] [2021-12-22 08:19:51,126 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 08:19:51,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 08:19:51,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:19:51,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 08:19:51,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-12-22 08:19:51,127 INFO L87 Difference]: Start difference. First operand 90 states and 106 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 08:19:51,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:19:51,241 INFO L93 Difference]: Finished difference Result 167 states and 203 transitions. [2021-12-22 08:19:51,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 08:19:51,242 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2021-12-22 08:19:51,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:19:51,242 INFO L225 Difference]: With dead ends: 167 [2021-12-22 08:19:51,242 INFO L226 Difference]: Without dead ends: 120 [2021-12-22 08:19:51,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-12-22 08:19:51,243 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 46 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:19:51,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 91 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 08:19:51,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-22 08:19:51,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 104. [2021-12-22 08:19:51,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 90 states have (on average 1.2) internal successors, (108), 91 states have internal predecessors, (108), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-22 08:19:51,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 124 transitions. [2021-12-22 08:19:51,256 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 124 transitions. Word has length 41 [2021-12-22 08:19:51,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:19:51,256 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 124 transitions. [2021-12-22 08:19:51,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 08:19:51,256 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 124 transitions. [2021-12-22 08:19:51,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-22 08:19:51,267 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:19:51,267 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:19:51,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 08:19:51,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:19:51,483 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:19:51,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:19:51,484 INFO L85 PathProgramCache]: Analyzing trace with hash 178867369, now seen corresponding path program 3 times [2021-12-22 08:19:51,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:19:51,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113012947] [2021-12-22 08:19:51,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:19:51,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:19:51,492 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 08:19:51,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1919563339] [2021-12-22 08:19:51,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 08:19:51,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:19:51,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:19:51,512 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 08:19:51,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 08:19:51,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-22 08:19:51,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:19:51,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 08:19:51,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:19:51,641 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-22 08:19:51,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:19:51,693 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-22 08:19:51,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:19:51,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113012947] [2021-12-22 08:19:51,693 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 08:19:51,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919563339] [2021-12-22 08:19:51,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919563339] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:19:51,693 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 08:19:51,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-12-22 08:19:51,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944009345] [2021-12-22 08:19:51,694 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 08:19:51,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 08:19:51,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:19:51,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 08:19:51,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-22 08:19:51,694 INFO L87 Difference]: Start difference. First operand 104 states and 124 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-22 08:19:51,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:19:51,780 INFO L93 Difference]: Finished difference Result 144 states and 167 transitions. [2021-12-22 08:19:51,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 08:19:51,780 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2021-12-22 08:19:51,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:19:51,780 INFO L225 Difference]: With dead ends: 144 [2021-12-22 08:19:51,781 INFO L226 Difference]: Without dead ends: 74 [2021-12-22 08:19:51,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-12-22 08:19:51,781 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 44 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:19:51,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 85 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 08:19:51,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-22 08:19:51,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2021-12-22 08:19:51,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 63 states have (on average 1.1746031746031746) internal successors, (74), 63 states have internal predecessors, (74), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-22 08:19:51,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2021-12-22 08:19:51,787 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 44 [2021-12-22 08:19:51,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:19:51,787 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2021-12-22 08:19:51,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-22 08:19:51,787 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2021-12-22 08:19:51,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-22 08:19:51,788 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:19:51,788 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:19:51,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 08:19:51,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:19:51,998 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:19:51,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:19:51,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1693722629, now seen corresponding path program 3 times [2021-12-22 08:19:51,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:19:51,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106359981] [2021-12-22 08:19:51,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:19:51,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:19:52,005 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 08:19:52,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [279757876] [2021-12-22 08:19:52,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 08:19:52,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:19:52,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:19:52,007 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 08:19:52,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 08:19:52,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-22 08:19:52,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:19:52,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-22 08:19:52,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:19:52,263 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-22 08:19:52,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:19:52,526 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-22 08:19:52,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:19:52,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106359981] [2021-12-22 08:19:52,526 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 08:19:52,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279757876] [2021-12-22 08:19:52,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279757876] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:19:52,527 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 08:19:52,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-12-22 08:19:52,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485497331] [2021-12-22 08:19:52,527 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 08:19:52,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-22 08:19:52,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:19:52,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-22 08:19:52,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-12-22 08:19:52,528 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand has 21 states, 19 states have (on average 2.473684210526316) internal successors, (47), 16 states have internal predecessors, (47), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-22 08:19:52,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:19:52,841 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2021-12-22 08:19:52,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-22 08:19:52,842 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.473684210526316) internal successors, (47), 16 states have internal predecessors, (47), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 48 [2021-12-22 08:19:52,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:19:52,843 INFO L225 Difference]: With dead ends: 98 [2021-12-22 08:19:52,843 INFO L226 Difference]: Without dead ends: 92 [2021-12-22 08:19:52,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=263, Invalid=859, Unknown=0, NotChecked=0, Total=1122 [2021-12-22 08:19:52,844 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 192 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 08:19:52,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 138 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 08:19:52,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-22 08:19:52,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 54. [2021-12-22 08:19:52,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 48 states have internal predecessors, (56), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 08:19:52,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2021-12-22 08:19:52,849 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 48 [2021-12-22 08:19:52,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:19:52,850 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2021-12-22 08:19:52,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.473684210526316) internal successors, (47), 16 states have internal predecessors, (47), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-22 08:19:52,850 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2021-12-22 08:19:52,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-22 08:19:52,850 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:19:52,850 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:19:52,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-22 08:19:53,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-22 08:19:53,068 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:19:53,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:19:53,069 INFO L85 PathProgramCache]: Analyzing trace with hash 11450257, now seen corresponding path program 4 times [2021-12-22 08:19:53,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:19:53,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223135433] [2021-12-22 08:19:53,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:19:53,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:19:53,076 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 08:19:53,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [955820918] [2021-12-22 08:19:53,076 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 08:19:53,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:19:53,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:19:53,092 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 08:19:53,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 08:19:53,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 08:19:53,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:19:53,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-22 08:19:53,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:19:53,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 56 [2021-12-22 08:19:53,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 59 [2021-12-22 08:19:53,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 18 [2021-12-22 08:19:53,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 22 [2021-12-22 08:19:53,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 75 [2021-12-22 08:19:53,455 INFO L353 Elim1Store]: treesize reduction 160, result has 19.6 percent of original size [2021-12-22 08:19:53,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 100 [2021-12-22 08:19:53,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:19:53,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 36 [2021-12-22 08:19:53,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:19:53,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 48 [2021-12-22 08:19:53,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 89 [2021-12-22 08:19:53,697 INFO L353 Elim1Store]: treesize reduction 321, result has 17.3 percent of original size [2021-12-22 08:19:53,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 88 treesize of output 131 [2021-12-22 08:19:53,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:19:53,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:19:53,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:19:53,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 53 [2021-12-22 08:19:53,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 69 [2021-12-22 08:19:53,873 INFO L353 Elim1Store]: treesize reduction 256, result has 15.5 percent of original size [2021-12-22 08:19:53,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 68 treesize of output 104 [2021-12-22 08:19:53,881 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-22 08:19:53,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:19:53,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:19:53,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:19:53,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:19:53,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:19:53,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:19:53,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 50 [2021-12-22 08:19:54,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 91 [2021-12-22 08:19:54,526 INFO L353 Elim1Store]: treesize reduction 342, result has 38.7 percent of original size [2021-12-22 08:19:54,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 90 treesize of output 286 [2021-12-22 08:19:56,530 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-22 08:19:56,661 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-22 08:19:56,772 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-22 08:19:56,984 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-22 08:19:57,103 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-22 08:19:57,969 INFO L353 Elim1Store]: treesize reduction 97, result has 49.7 percent of original size [2021-12-22 08:19:57,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 867 treesize of output 711 [2021-12-22 08:20:03,354 INFO L353 Elim1Store]: treesize reduction 918, result has 11.1 percent of original size [2021-12-22 08:20:03,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 378 treesize of output 241 [2021-12-22 08:20:03,702 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 08:20:03,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:20:16,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:20:16,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223135433] [2021-12-22 08:20:16,470 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 08:20:16,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955820918] [2021-12-22 08:20:16,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955820918] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:20:16,470 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-22 08:20:16,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-12-22 08:20:16,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367636230] [2021-12-22 08:20:16,471 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-22 08:20:16,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-22 08:20:16,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:20:16,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-22 08:20:16,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1457, Unknown=5, NotChecked=0, Total=1722 [2021-12-22 08:20:16,472 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-22 08:20:17,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:20:17,359 INFO L93 Difference]: Finished difference Result 153 states and 182 transitions. [2021-12-22 08:20:17,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-22 08:20:17,359 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2021-12-22 08:20:17,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:20:17,360 INFO L225 Difference]: With dead ends: 153 [2021-12-22 08:20:17,360 INFO L226 Difference]: Without dead ends: 149 [2021-12-22 08:20:17,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=338, Invalid=1913, Unknown=5, NotChecked=0, Total=2256 [2021-12-22 08:20:17,361 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 90 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 1433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 920 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 08:20:17,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 464 Invalid, 1433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 476 Invalid, 0 Unknown, 920 Unchecked, 0.5s Time] [2021-12-22 08:20:17,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-12-22 08:20:17,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 90. [2021-12-22 08:20:17,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 81 states have (on average 1.1851851851851851) internal successors, (96), 81 states have internal predecessors, (96), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-22 08:20:17,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 106 transitions. [2021-12-22 08:20:17,373 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 106 transitions. Word has length 57 [2021-12-22 08:20:17,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:20:17,373 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 106 transitions. [2021-12-22 08:20:17,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-22 08:20:17,374 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 106 transitions. [2021-12-22 08:20:17,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-22 08:20:17,374 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:20:17,374 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:20:17,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 08:20:17,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-22 08:20:17,592 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:20:17,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:20:17,592 INFO L85 PathProgramCache]: Analyzing trace with hash 230304975, now seen corresponding path program 4 times [2021-12-22 08:20:17,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:20:17,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034068777] [2021-12-22 08:20:17,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:20:17,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:20:17,599 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 08:20:17,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [726906628] [2021-12-22 08:20:17,600 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 08:20:17,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:20:17,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:20:17,601 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 08:20:17,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 08:20:18,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 08:20:18,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:20:18,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-22 08:20:18,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:20:18,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 56 [2021-12-22 08:20:18,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-22 08:20:18,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-12-22 08:20:18,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 73 [2021-12-22 08:20:18,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:18,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:18,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 08:20:18,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 94 [2021-12-22 08:20:18,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:18,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 7 [2021-12-22 08:20:18,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 87 [2021-12-22 08:20:18,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:18,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:18,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:18,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:18,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:18,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:18,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 127 [2021-12-22 08:20:18,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:18,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:18,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:18,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 35 [2021-12-22 08:20:18,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 69 [2021-12-22 08:20:18,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:18,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:18,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:18,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:18,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:18,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:18,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:18,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:18,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:18,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:18,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 104 [2021-12-22 08:20:18,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:18,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:18,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:18,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:18,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:18,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:18,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 30 [2021-12-22 08:20:19,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 117 [2021-12-22 08:20:19,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:19,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:19,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:19,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:19,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:19,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:19,256 INFO L353 Elim1Store]: treesize reduction 479, result has 25.7 percent of original size [2021-12-22 08:20:19,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 116 treesize of output 236 [2021-12-22 08:20:19,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:19,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:19,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:19,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:19,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:19,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:19,952 INFO L353 Elim1Store]: treesize reduction 127, result has 43.0 percent of original size [2021-12-22 08:20:19,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 173 treesize of output 202 [2021-12-22 08:20:20,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:20,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:20,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:20,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:20,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:20,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:20,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:20,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:20,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:20:20,701 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 08:20:20,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 83 treesize of output 37 [2021-12-22 08:20:20,786 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 08:20:20,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:20:43,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 52 [2021-12-22 08:20:44,064 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 08:20:44,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 59 [2021-12-22 08:20:44,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 4 [2021-12-22 08:20:44,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 4 [2021-12-22 08:20:45,852 INFO L353 Elim1Store]: treesize reduction 260, result has 56.4 percent of original size [2021-12-22 08:20:45,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 405481 treesize of output 381724 [2021-12-22 08:20:46,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:20:46,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034068777] [2021-12-22 08:20:46,476 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 08:20:46,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726906628] [2021-12-22 08:20:46,476 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-22 08:20:46,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:20:46,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-12-22 08:20:46,476 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-12-22 08:20:46,476 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-12-22 08:20:46,481 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-22 08:20:46,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-22 08:20:46,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-22 08:20:46,701 INFO L732 BasicCegarLoop]: Path program histogram: [4, 4, 1, 1, 1] [2021-12-22 08:20:46,703 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-22 08:20:46,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 08:20:46 BoogieIcfgContainer [2021-12-22 08:20:46,713 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-22 08:20:46,713 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-22 08:20:46,714 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-22 08:20:46,714 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-22 08:20:46,714 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:19:44" (3/4) ... [2021-12-22 08:20:46,716 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-22 08:20:46,716 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-22 08:20:46,716 INFO L158 Benchmark]: Toolchain (without parser) took 62245.23ms. Allocated memory was 96.5MB in the beginning and 174.1MB in the end (delta: 77.6MB). Free memory was 69.6MB in the beginning and 63.5MB in the end (delta: 6.1MB). Peak memory consumption was 83.1MB. Max. memory is 16.1GB. [2021-12-22 08:20:46,717 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 96.5MB. Free memory was 56.6MB in the beginning and 56.5MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 08:20:46,717 INFO L158 Benchmark]: CACSL2BoogieTranslator took 175.43ms. Allocated memory was 96.5MB in the beginning and 119.5MB in the end (delta: 23.1MB). Free memory was 69.3MB in the beginning and 95.4MB in the end (delta: -26.1MB). Peak memory consumption was 9.2MB. Max. memory is 16.1GB. [2021-12-22 08:20:46,717 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.98ms. Allocated memory is still 119.5MB. Free memory was 95.4MB in the beginning and 93.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 08:20:46,717 INFO L158 Benchmark]: Boogie Preprocessor took 39.17ms. Allocated memory is still 119.5MB. Free memory was 93.8MB in the beginning and 92.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 08:20:46,717 INFO L158 Benchmark]: RCFGBuilder took 231.30ms. Allocated memory is still 119.5MB. Free memory was 92.4MB in the beginning and 81.2MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-22 08:20:46,718 INFO L158 Benchmark]: TraceAbstraction took 61761.32ms. Allocated memory was 119.5MB in the beginning and 174.1MB in the end (delta: 54.5MB). Free memory was 80.8MB in the beginning and 63.5MB in the end (delta: 17.2MB). Peak memory consumption was 92.7MB. Max. memory is 16.1GB. [2021-12-22 08:20:46,718 INFO L158 Benchmark]: Witness Printer took 2.61ms. Allocated memory is still 174.1MB. Free memory is still 63.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 08:20:46,719 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 96.5MB. Free memory was 56.6MB in the beginning and 56.5MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 175.43ms. Allocated memory was 96.5MB in the beginning and 119.5MB in the end (delta: 23.1MB). Free memory was 69.3MB in the beginning and 95.4MB in the end (delta: -26.1MB). Peak memory consumption was 9.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.98ms. Allocated memory is still 119.5MB. Free memory was 95.4MB in the beginning and 93.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 39.17ms. Allocated memory is still 119.5MB. Free memory was 93.8MB in the beginning and 92.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 231.30ms. Allocated memory is still 119.5MB. Free memory was 92.4MB in the beginning and 81.2MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 61761.32ms. Allocated memory was 119.5MB in the beginning and 174.1MB in the end (delta: 54.5MB). Free memory was 80.8MB in the beginning and 63.5MB in the end (delta: 17.2MB). Peak memory consumption was 92.7MB. Max. memory is 16.1GB. * Witness Printer took 2.61ms. Allocated memory is still 174.1MB. Free memory is still 63.5MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 39]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L43] signed long long ARR_SIZE ; [L47] ARR_SIZE = (signed long long)__VERIFIER_nondet_short() [L48] CALL assume_abort_if_not(ARR_SIZE > 0) [L37] COND FALSE !(!cond) [L48] RET assume_abort_if_not(ARR_SIZE > 0) [L50] int array[ARR_SIZE][ARR_SIZE] ; [L52] int row = 0, column = 0, num = -1 ; [L53] signed long long sum = 0 ; [L54] int temp ; [L55] short index1,index2 ; [L57] row=0 [L57] COND TRUE row=0 && index1 < ARR_SIZE) [L37] COND FALSE !(!cond) [L66] RET assume_abort_if_not(index1>=0 && index1 < ARR_SIZE) [L67] CALL assume_abort_if_not(index2>=0 && index2 < ARR_SIZE) [L37] COND FALSE !(!cond) [L67] RET assume_abort_if_not(index2>=0 && index2 < ARR_SIZE) [L69] temp = index1+index2 [L70] EXPR (temp == ARR_SIZE-2 || temp == ARR_SIZE) ? (num*num*num*num) : array[index1][index2] [L70] EXPR array[index1][index2] [L70] EXPR (temp == ARR_SIZE-2 || temp == ARR_SIZE) ? (num*num*num*num) : array[index1][index2] [L70] array[index1][index2] = (temp == ARR_SIZE-2 || temp == ARR_SIZE) ? (num*num*num*num) : array[index1][index2] [L73] temp = __VERIFIER_nondet_int() [L74] COND TRUE temp == 0 [L77] row=0 [L77] COND TRUE row 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 -> 511c1484167d1d7d90ff27dae8a1569edd7c5a72fd917e4f05baeab770e0fcd4 [2021-12-22 08:20:48,838 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 08:20:48,853 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 08:20:48,855 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 08:20:48,855 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 08:20:48,856 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 08:20:48,857 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array15_pattern.c [2021-12-22 08:20:48,903 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85ba5cb26/470f345d5dfe451496d1cd90c7843a91/FLAGeed7c6e30 [2021-12-22 08:20:49,298 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 08:20:49,299 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array15_pattern.c [2021-12-22 08:20:49,308 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85ba5cb26/470f345d5dfe451496d1cd90c7843a91/FLAGeed7c6e30 [2021-12-22 08:20:49,317 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85ba5cb26/470f345d5dfe451496d1cd90c7843a91 [2021-12-22 08:20:49,319 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 08:20:49,319 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 08:20:49,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 08:20:49,320 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 08:20:49,323 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 08:20:49,323 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:20:49" (1/1) ... [2021-12-22 08:20:49,324 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c4317d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:20:49, skipping insertion in model container [2021-12-22 08:20:49,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:20:49" (1/1) ... [2021-12-22 08:20:49,328 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 08:20:49,337 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 08:20:49,415 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array15_pattern.c[1424,1437] [2021-12-22 08:20:49,429 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 08:20:49,435 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 08:20:49,474 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array15_pattern.c[1424,1437] [2021-12-22 08:20:49,490 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 08:20:49,502 INFO L208 MainTranslator]: Completed translation [2021-12-22 08:20:49,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:20:49 WrapperNode [2021-12-22 08:20:49,503 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 08:20:49,504 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 08:20:49,504 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 08:20:49,504 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 08:20:49,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:20:49" (1/1) ... [2021-12-22 08:20:49,520 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:20:49" (1/1) ... [2021-12-22 08:20:49,540 INFO L137 Inliner]: procedures = 18, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 92 [2021-12-22 08:20:49,541 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 08:20:49,542 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 08:20:49,542 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 08:20:49,542 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 08:20:49,548 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:20:49" (1/1) ... [2021-12-22 08:20:49,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:20:49" (1/1) ... [2021-12-22 08:20:49,553 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:20:49" (1/1) ... [2021-12-22 08:20:49,553 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:20:49" (1/1) ... [2021-12-22 08:20:49,568 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:20:49" (1/1) ... [2021-12-22 08:20:49,572 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:20:49" (1/1) ... [2021-12-22 08:20:49,577 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:20:49" (1/1) ... [2021-12-22 08:20:49,580 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 08:20:49,582 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 08:20:49,582 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 08:20:49,582 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 08:20:49,583 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:20:49" (1/1) ... [2021-12-22 08:20:49,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 08:20:49,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:20:49,623 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 08:20:49,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 08:20:49,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 08:20:49,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-22 08:20:49,657 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-22 08:20:49,657 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-22 08:20:49,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 08:20:49,658 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-22 08:20:49,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 08:20:49,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 08:20:49,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 08:20:49,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-22 08:20:49,719 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 08:20:49,720 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 08:20:50,033 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 08:20:50,038 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 08:20:50,038 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-22 08:20:50,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:20:50 BoogieIcfgContainer [2021-12-22 08:20:50,039 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 08:20:50,040 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 08:20:50,040 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 08:20:50,042 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 08:20:50,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:20:49" (1/3) ... [2021-12-22 08:20:50,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40bfbb95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:20:50, skipping insertion in model container [2021-12-22 08:20:50,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:20:49" (2/3) ... [2021-12-22 08:20:50,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40bfbb95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:20:50, skipping insertion in model container [2021-12-22 08:20:50,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:20:50" (3/3) ... [2021-12-22 08:20:50,045 INFO L111 eAbstractionObserver]: Analyzing ICFG array15_pattern.c [2021-12-22 08:20:50,049 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 08:20:50,050 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 08:20:50,086 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 08:20:50,091 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 08:20:50,091 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 08:20:50,106 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 27 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 08:20:50,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-22 08:20:50,110 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:20:50,110 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:20:50,111 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:20:50,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:20:50,117 INFO L85 PathProgramCache]: Analyzing trace with hash 179087049, now seen corresponding path program 1 times [2021-12-22 08:20:50,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 08:20:50,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [485232990] [2021-12-22 08:20:50,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:20:50,127 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 08:20:50,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 08:20:50,132 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 08:20:50,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-22 08:20:50,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:20:50,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-22 08:20:50,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:20:50,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:20:50,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 08:20:50,265 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 08:20:50,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [485232990] [2021-12-22 08:20:50,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [485232990] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:20:50,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:20:50,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 08:20:50,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466913277] [2021-12-22 08:20:50,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:20:50,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 08:20:50,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 08:20:50,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 08:20:50,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 08:20:50,290 INFO L87 Difference]: Start difference. First operand has 32 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 27 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 08:20:50,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:20:50,313 INFO L93 Difference]: Finished difference Result 61 states and 93 transitions. [2021-12-22 08:20:50,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 08:20:50,315 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-12-22 08:20:50,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:20:50,320 INFO L225 Difference]: With dead ends: 61 [2021-12-22 08:20:50,321 INFO L226 Difference]: Without dead ends: 28 [2021-12-22 08:20:50,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 08:20:50,327 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:20:50,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:20:50,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-22 08:20:50,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-12-22 08:20:50,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 08:20:50,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2021-12-22 08:20:50,356 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 15 [2021-12-22 08:20:50,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:20:50,356 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2021-12-22 08:20:50,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 08:20:50,356 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2021-12-22 08:20:50,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-22 08:20:50,358 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:20:50,358 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:20:50,377 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-22 08:20:50,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 08:20:50,564 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:20:50,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:20:50,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1195633489, now seen corresponding path program 1 times [2021-12-22 08:20:50,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 08:20:50,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [861472068] [2021-12-22 08:20:50,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:20:50,566 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 08:20:50,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 08:20:50,567 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 08:20:50,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-22 08:20:50,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:20:50,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 08:20:50,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:20:50,981 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 08:20:50,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:20:51,463 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 08:20:51,464 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 08:20:51,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [861472068] [2021-12-22 08:20:51,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [861472068] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:20:51,464 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 08:20:51,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-22 08:20:51,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132912016] [2021-12-22 08:20:51,465 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 08:20:51,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 08:20:51,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 08:20:51,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 08:20:51,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-22 08:20:51,467 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-22 08:20:51,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:20:51,608 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2021-12-22 08:20:51,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 08:20:51,609 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 29 [2021-12-22 08:20:51,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:20:51,611 INFO L225 Difference]: With dead ends: 51 [2021-12-22 08:20:51,611 INFO L226 Difference]: Without dead ends: 47 [2021-12-22 08:20:51,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-12-22 08:20:51,612 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 31 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:20:51,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 136 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 29 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2021-12-22 08:20:51,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-22 08:20:51,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-12-22 08:20:51,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 states have internal predecessors, (46), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-22 08:20:51,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2021-12-22 08:20:51,621 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 29 [2021-12-22 08:20:51,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:20:51,621 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2021-12-22 08:20:51,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-22 08:20:51,621 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2021-12-22 08:20:51,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-22 08:20:51,622 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:20:51,622 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:20:51,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-22 08:20:51,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 08:20:51,823 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:20:51,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:20:51,823 INFO L85 PathProgramCache]: Analyzing trace with hash 386286863, now seen corresponding path program 1 times [2021-12-22 08:20:51,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 08:20:51,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [894104331] [2021-12-22 08:20:51,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:20:51,824 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 08:20:51,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 08:20:51,826 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 08:20:51,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-22 08:20:51,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:20:51,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 08:20:51,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:20:52,291 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 08:20:52,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:20:52,656 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 08:20:52,656 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 08:20:52,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [894104331] [2021-12-22 08:20:52,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [894104331] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:20:52,656 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 08:20:52,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-22 08:20:52,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094788013] [2021-12-22 08:20:52,657 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 08:20:52,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 08:20:52,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 08:20:52,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 08:20:52,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-22 08:20:52,658 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-22 08:20:52,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:20:52,872 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2021-12-22 08:20:52,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 08:20:52,874 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 29 [2021-12-22 08:20:52,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:20:52,874 INFO L225 Difference]: With dead ends: 76 [2021-12-22 08:20:52,875 INFO L226 Difference]: Without dead ends: 72 [2021-12-22 08:20:52,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-12-22 08:20:52,876 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 27 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 08:20:52,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 144 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 54 Invalid, 0 Unknown, 69 Unchecked, 0.2s Time] [2021-12-22 08:20:52,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-22 08:20:52,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2021-12-22 08:20:52,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 55 states have internal predecessors, (68), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-22 08:20:52,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 86 transitions. [2021-12-22 08:20:52,899 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 86 transitions. Word has length 29 [2021-12-22 08:20:52,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:20:52,900 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 86 transitions. [2021-12-22 08:20:52,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-22 08:20:52,900 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 86 transitions. [2021-12-22 08:20:52,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-22 08:20:52,903 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:20:52,903 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:20:52,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-22 08:20:53,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 08:20:53,111 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:20:53,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:20:53,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1917152573, now seen corresponding path program 1 times [2021-12-22 08:20:53,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 08:20:53,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [830683551] [2021-12-22 08:20:53,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:20:53,113 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 08:20:53,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 08:20:53,115 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 08:20:53,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-22 08:20:53,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:20:53,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 08:20:53,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:20:53,529 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 08:20:53,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:20:53,908 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-22 08:20:53,908 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 08:20:53,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [830683551] [2021-12-22 08:20:53,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [830683551] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:20:53,909 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 08:20:53,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-22 08:20:53,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161222814] [2021-12-22 08:20:53,909 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 08:20:53,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 08:20:53,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 08:20:53,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 08:20:53,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-22 08:20:53,910 INFO L87 Difference]: Start difference. First operand 70 states and 86 transitions. Second operand has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-22 08:20:54,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:20:54,027 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2021-12-22 08:20:54,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 08:20:54,028 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 32 [2021-12-22 08:20:54,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:20:54,029 INFO L225 Difference]: With dead ends: 77 [2021-12-22 08:20:54,029 INFO L226 Difference]: Without dead ends: 73 [2021-12-22 08:20:54,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-12-22 08:20:54,030 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 23 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:20:54,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 149 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2021-12-22 08:20:54,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-22 08:20:54,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 68. [2021-12-22 08:20:54,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 53 states have internal predecessors, (66), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-22 08:20:54,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2021-12-22 08:20:54,037 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 32 [2021-12-22 08:20:54,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:20:54,037 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2021-12-22 08:20:54,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-22 08:20:54,037 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2021-12-22 08:20:54,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-22 08:20:54,038 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:20:54,038 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:20:54,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0