./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/mlceu2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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-tiling/mlceu2.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 5f6dc88ffbc484195ca6ca04cd67e8542305d5e0e0d9b35d5440f9c4d427d3ec --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 22:46:42,531 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 22:46:42,533 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 22:46:42,582 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 22:46:42,583 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 22:46:42,583 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 22:46:42,595 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 22:46:42,597 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 22:46:42,598 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 22:46:42,598 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 22:46:42,599 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 22:46:42,599 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 22:46:42,600 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 22:46:42,600 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 22:46:42,601 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 22:46:42,602 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 22:46:42,602 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 22:46:42,603 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 22:46:42,604 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 22:46:42,605 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 22:46:42,606 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 22:46:42,609 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 22:46:42,610 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 22:46:42,610 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 22:46:42,612 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 22:46:42,619 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 22:46:42,619 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 22:46:42,620 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 22:46:42,620 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 22:46:42,621 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 22:46:42,621 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 22:46:42,622 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 22:46:42,623 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 22:46:42,624 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 22:46:42,624 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 22:46:42,625 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 22:46:42,625 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 22:46:42,625 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 22:46:42,625 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 22:46:42,626 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 22:46:42,626 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 22:46:42,628 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 22:46:42,652 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 22:46:42,652 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 22:46:42,653 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 22:46:42,653 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 22:46:42,653 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 22:46:42,654 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 22:46:42,654 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 22:46:42,654 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 22:46:42,655 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 22:46:42,655 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 22:46:42,655 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 22:46:42,656 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 22:46:42,656 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 22:46:42,656 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 22:46:42,656 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 22:46:42,656 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 22:46:42,656 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 22:46:42,656 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 22:46:42,657 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 22:46:42,657 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 22:46:42,657 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 22:46:42,657 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 22:46:42,657 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 22:46:42,657 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 22:46:42,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 22:46:42,658 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 22:46:42,658 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 22:46:42,659 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 22:46:42,659 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 22:46:42,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 22:46:42,659 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 22:46:42,659 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 22:46:42,660 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 22:46:42,660 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 22:46:42,660 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5f6dc88ffbc484195ca6ca04cd67e8542305d5e0e0d9b35d5440f9c4d427d3ec [2021-12-16 22:46:42,832 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 22:46:42,847 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 22:46:42,850 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 22:46:42,850 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 22:46:42,851 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 22:46:42,852 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/mlceu2.c [2021-12-16 22:46:42,898 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6f7602d2/ce33f2d959964b32ae82b4f9b42aebf5/FLAG484bcdddb [2021-12-16 22:46:43,208 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 22:46:43,208 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/mlceu2.c [2021-12-16 22:46:43,213 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6f7602d2/ce33f2d959964b32ae82b4f9b42aebf5/FLAG484bcdddb [2021-12-16 22:46:43,656 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6f7602d2/ce33f2d959964b32ae82b4f9b42aebf5 [2021-12-16 22:46:43,658 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 22:46:43,659 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 22:46:43,675 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 22:46:43,675 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 22:46:43,678 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 22:46:43,678 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 10:46:43" (1/1) ... [2021-12-16 22:46:43,679 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65cffad6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:46:43, skipping insertion in model container [2021-12-16 22:46:43,679 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 10:46:43" (1/1) ... [2021-12-16 22:46:43,683 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 22:46:43,694 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 22:46:43,801 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-tiling/mlceu2.c[397,410] [2021-12-16 22:46:43,810 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 22:46:43,817 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 22:46:43,828 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-tiling/mlceu2.c[397,410] [2021-12-16 22:46:43,834 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 22:46:43,848 INFO L208 MainTranslator]: Completed translation [2021-12-16 22:46:43,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:46:43 WrapperNode [2021-12-16 22:46:43,849 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 22:46:43,850 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 22:46:43,850 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 22:46:43,850 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 22:46:43,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:46:43" (1/1) ... [2021-12-16 22:46:43,859 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:46:43" (1/1) ... [2021-12-16 22:46:43,876 INFO L137 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 49 [2021-12-16 22:46:43,877 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 22:46:43,877 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 22:46:43,877 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 22:46:43,877 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 22:46:43,883 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:46:43" (1/1) ... [2021-12-16 22:46:43,883 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:46:43" (1/1) ... [2021-12-16 22:46:43,892 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:46:43" (1/1) ... [2021-12-16 22:46:43,892 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:46:43" (1/1) ... [2021-12-16 22:46:43,899 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:46:43" (1/1) ... [2021-12-16 22:46:43,905 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:46:43" (1/1) ... [2021-12-16 22:46:43,907 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:46:43" (1/1) ... [2021-12-16 22:46:43,911 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 22:46:43,912 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 22:46:43,912 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 22:46:43,912 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 22:46:43,913 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:46:43" (1/1) ... [2021-12-16 22:46:43,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 22:46:43,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:46:43,948 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) [2021-12-16 22:46:43,968 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 [2021-12-16 22:46:43,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 22:46:43,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 22:46:43,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 22:46:43,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 22:46:43,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 22:46:43,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 22:46:43,981 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 22:46:44,026 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 22:46:44,027 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 22:46:44,095 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 22:46:44,100 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 22:46:44,100 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-16 22:46:44,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 10:46:44 BoogieIcfgContainer [2021-12-16 22:46:44,102 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 22:46:44,103 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 22:46:44,103 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 22:46:44,106 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 22:46:44,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 10:46:43" (1/3) ... [2021-12-16 22:46:44,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cf123e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 10:46:44, skipping insertion in model container [2021-12-16 22:46:44,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:46:43" (2/3) ... [2021-12-16 22:46:44,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cf123e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 10:46:44, skipping insertion in model container [2021-12-16 22:46:44,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 10:46:44" (3/3) ... [2021-12-16 22:46:44,108 INFO L111 eAbstractionObserver]: Analyzing ICFG mlceu2.c [2021-12-16 22:46:44,112 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 22:46:44,112 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 22:46:44,158 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 22:46:44,162 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 [2021-12-16 22:46:44,162 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 22:46:44,184 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:44,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-16 22:46:44,187 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:46:44,187 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:46:44,188 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:46:44,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:46:44,195 INFO L85 PathProgramCache]: Analyzing trace with hash 131762974, now seen corresponding path program 1 times [2021-12-16 22:46:44,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:46:44,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904743324] [2021-12-16 22:46:44,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:46:44,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:46:44,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:46:44,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:44,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:46:44,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904743324] [2021-12-16 22:46:44,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904743324] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:46:44,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 22:46:44,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 22:46:44,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595643175] [2021-12-16 22:46:44,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:46:44,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 22:46:44,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:46:44,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 22:46:44,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 22:46:44,354 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:44,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:46:44,364 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2021-12-16 22:46:44,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 22:46:44,365 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-16 22:46:44,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:46:44,382 INFO L225 Difference]: With dead ends: 28 [2021-12-16 22:46:44,383 INFO L226 Difference]: Without dead ends: 13 [2021-12-16 22:46:44,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 22:46:44,388 INFO L933 BasicCegarLoop]: 20 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, 20 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 [2021-12-16 22:46:44,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:46:44,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-12-16 22:46:44,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-12-16 22:46:44,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:44,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-12-16 22:46:44,414 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2021-12-16 22:46:44,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:46:44,415 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-12-16 22:46:44,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:44,415 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-12-16 22:46:44,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-16 22:46:44,416 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:46:44,416 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:46:44,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 22:46:44,417 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:46:44,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:46:44,420 INFO L85 PathProgramCache]: Analyzing trace with hash 121604243, now seen corresponding path program 1 times [2021-12-16 22:46:44,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:46:44,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280962862] [2021-12-16 22:46:44,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:46:44,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:46:44,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:46:44,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:44,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:46:44,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280962862] [2021-12-16 22:46:44,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280962862] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:46:44,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 22:46:44,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 22:46:44,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097709655] [2021-12-16 22:46:44,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:46:44,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 22:46:44,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:46:44,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 22:46:44,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 22:46:44,519 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:44,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:46:44,549 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2021-12-16 22:46:44,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 22:46:44,549 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-16 22:46:44,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:46:44,563 INFO L225 Difference]: With dead ends: 26 [2021-12-16 22:46:44,563 INFO L226 Difference]: Without dead ends: 16 [2021-12-16 22:46:44,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 22:46:44,565 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:46:44,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 16 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:46:44,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-12-16 22:46:44,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-12-16 22:46:44,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:44,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-12-16 22:46:44,569 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 8 [2021-12-16 22:46:44,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:46:44,569 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-12-16 22:46:44,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:44,569 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-12-16 22:46:44,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-16 22:46:44,570 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:46:44,570 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:46:44,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 22:46:44,570 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:46:44,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:46:44,571 INFO L85 PathProgramCache]: Analyzing trace with hash -150898456, now seen corresponding path program 1 times [2021-12-16 22:46:44,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:46:44,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175376354] [2021-12-16 22:46:44,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:46:44,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:46:44,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:46:44,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:44,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:46:44,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175376354] [2021-12-16 22:46:44,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175376354] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:46:44,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345152170] [2021-12-16 22:46:44,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:46:44,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:46:44,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:46:44,643 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) [2021-12-16 22:46:44,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 22:46:44,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:46:44,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 22:46:44,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:46:44,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:44,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:46:44,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:44,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345152170] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:46:44,824 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:46:44,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-16 22:46:44,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765329874] [2021-12-16 22:46:44,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:46:44,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 22:46:44,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:46:44,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 22:46:44,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-12-16 22:46:44,826 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:44,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:46:44,859 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2021-12-16 22:46:44,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 22:46:44,859 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-16 22:46:44,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:46:44,860 INFO L225 Difference]: With dead ends: 29 [2021-12-16 22:46:44,860 INFO L226 Difference]: Without dead ends: 19 [2021-12-16 22:46:44,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-12-16 22:46:44,861 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 10 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:46:44,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 22 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:46:44,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-12-16 22:46:44,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-12-16 22:46:44,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:44,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-12-16 22:46:44,865 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 11 [2021-12-16 22:46:44,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:46:44,865 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-12-16 22:46:44,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:44,865 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-12-16 22:46:44,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-16 22:46:44,866 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:46:44,866 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:46:44,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 22:46:45,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:46:45,087 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:46:45,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:46:45,088 INFO L85 PathProgramCache]: Analyzing trace with hash -790614925, now seen corresponding path program 2 times [2021-12-16 22:46:45,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:46:45,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167674027] [2021-12-16 22:46:45,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:46:45,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:46:45,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:46:45,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:45,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:46:45,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167674027] [2021-12-16 22:46:45,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167674027] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:46:45,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741936625] [2021-12-16 22:46:45,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:46:45,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:46:45,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:46:45,277 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) [2021-12-16 22:46:45,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 22:46:45,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:46:45,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:46:45,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-16 22:46:45,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:46:45,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:46:45,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:45,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-16 22:46:45,503 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:45,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:46:47,612 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_22| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_22| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_28 Int)) (= 0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_22| 4)) v_ArrVal_28) |c_ULTIMATE.start_main_~a~0#1.offset|))))) is different from false [2021-12-16 22:46:47,625 INFO L388 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 21 treesize of output 19 [2021-12-16 22:46:47,629 INFO L388 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 64 treesize of output 62 [2021-12-16 22:46:47,659 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-12-16 22:46:47,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741936625] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:46:47,660 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:46:47,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 15 [2021-12-16 22:46:47,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960080275] [2021-12-16 22:46:47,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:46:47,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-16 22:46:47,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:46:47,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-16 22:46:47,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=140, Unknown=1, NotChecked=24, Total=210 [2021-12-16 22:46:47,662 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:49,683 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~0#1_22| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_22| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_28 Int)) (= 0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_22| 4)) v_ArrVal_28) |c_ULTIMATE.start_main_~a~0#1.offset|))))) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= |c_ULTIMATE.start_main_~i~0#1| 0) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)) 0)) is different from false [2021-12-16 22:46:49,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:46:49,770 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-12-16 22:46:49,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 22:46:49,771 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-16 22:46:49,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:46:49,772 INFO L225 Difference]: With dead ends: 26 [2021-12-16 22:46:49,772 INFO L226 Difference]: Without dead ends: 24 [2021-12-16 22:46:49,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=85, Invalid=227, Unknown=2, NotChecked=66, Total=380 [2021-12-16 22:46:49,773 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 46 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:46:49,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 31 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 60 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2021-12-16 22:46:49,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-16 22:46:49,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2021-12-16 22:46:49,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:49,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-12-16 22:46:49,776 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 14 [2021-12-16 22:46:49,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:46:49,776 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-12-16 22:46:49,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:49,777 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-12-16 22:46:49,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-16 22:46:49,777 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:46:49,777 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:46:49,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 22:46:49,979 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,SelfDestructingSolverStorable3 [2021-12-16 22:46:49,982 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:46:49,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:46:49,982 INFO L85 PathProgramCache]: Analyzing trace with hash -601757591, now seen corresponding path program 1 times [2021-12-16 22:46:49,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:46:49,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847100917] [2021-12-16 22:46:49,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:46:49,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:46:49,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:46:50,073 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:50,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:46:50,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847100917] [2021-12-16 22:46:50,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847100917] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:46:50,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927002892] [2021-12-16 22:46:50,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:46:50,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:46:50,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:46:50,079 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) [2021-12-16 22:46:50,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 22:46:50,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:46:50,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-16 22:46:50,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:46:50,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:46:50,198 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:50,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:46:50,245 INFO L388 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 16 treesize of output 14 [2021-12-16 22:46:50,247 INFO L388 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 28 treesize of output 24 [2021-12-16 22:46:50,268 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:50,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927002892] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:46:50,269 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:46:50,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 11 [2021-12-16 22:46:50,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760721144] [2021-12-16 22:46:50,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:46:50,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-16 22:46:50,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:46:50,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-16 22:46:50,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-16 22:46:50,270 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:50,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:46:50,376 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2021-12-16 22:46:50,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 22:46:50,377 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-16 22:46:50,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:46:50,377 INFO L225 Difference]: With dead ends: 31 [2021-12-16 22:46:50,377 INFO L226 Difference]: Without dead ends: 29 [2021-12-16 22:46:50,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-12-16 22:46:50,378 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:46:50,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 42 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:46:50,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-16 22:46:50,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2021-12-16 22:46:50,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:50,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-12-16 22:46:50,386 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2021-12-16 22:46:50,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:46:50,387 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-12-16 22:46:50,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:50,387 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-12-16 22:46:50,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-16 22:46:50,387 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:46:50,387 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:46:50,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 22:46:50,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:46:50,603 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:46:50,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:46:50,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1214727841, now seen corresponding path program 2 times [2021-12-16 22:46:50,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:46:50,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001063296] [2021-12-16 22:46:50,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:46:50,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:46:50,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:46:50,665 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:50,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:46:50,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001063296] [2021-12-16 22:46:50,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001063296] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:46:50,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643222157] [2021-12-16 22:46:50,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:46:50,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:46:50,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:46:50,667 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) [2021-12-16 22:46:50,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 22:46:50,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:46:50,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:46:50,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 22:46:50,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:46:50,775 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:50,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:46:50,811 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:50,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643222157] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:46:50,812 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:46:50,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-16 22:46:50,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822659923] [2021-12-16 22:46:50,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:46:50,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 22:46:50,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:46:50,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 22:46:50,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-16 22:46:50,814 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:50,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:46:50,872 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2021-12-16 22:46:50,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 22:46:50,872 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-16 22:46:50,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:46:50,873 INFO L225 Difference]: With dead ends: 62 [2021-12-16 22:46:50,873 INFO L226 Difference]: Without dead ends: 36 [2021-12-16 22:46:50,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-12-16 22:46:50,874 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:46:50,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 42 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:46:50,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-16 22:46:50,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2021-12-16 22:46:50,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:50,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-12-16 22:46:50,878 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 22 [2021-12-16 22:46:50,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:46:50,878 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-12-16 22:46:50,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:50,878 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-12-16 22:46:50,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-16 22:46:50,879 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:46:50,879 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:46:50,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 22:46:51,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:46:51,096 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:46:51,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:46:51,096 INFO L85 PathProgramCache]: Analyzing trace with hash 185659636, now seen corresponding path program 3 times [2021-12-16 22:46:51,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:46:51,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146713601] [2021-12-16 22:46:51,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:46:51,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:46:51,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:46:51,204 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:51,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:46:51,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146713601] [2021-12-16 22:46:51,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146713601] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:46:51,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592062077] [2021-12-16 22:46:51,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:46:51,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:46:51,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:46:51,206 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) [2021-12-16 22:46:51,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 22:46:51,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-16 22:46:51,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:46:51,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-16 22:46:51,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:46:51,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:46:51,550 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-16 22:46:51,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2021-12-16 22:46:51,564 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:51,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:46:51,806 INFO L388 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 18 treesize of output 16 [2021-12-16 22:46:51,809 INFO L388 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 34 treesize of output 28 [2021-12-16 22:46:51,826 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:51,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592062077] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:46:51,827 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:46:51,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 27 [2021-12-16 22:46:51,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583410561] [2021-12-16 22:46:51,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:46:51,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-16 22:46:51,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:46:51,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-16 22:46:51,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-12-16 22:46:51,828 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:52,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:46:52,055 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2021-12-16 22:46:52,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-16 22:46:52,055 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-16 22:46:52,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:46:52,056 INFO L225 Difference]: With dead ends: 46 [2021-12-16 22:46:52,056 INFO L226 Difference]: Without dead ends: 30 [2021-12-16 22:46:52,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=236, Invalid=1246, Unknown=0, NotChecked=0, Total=1482 [2021-12-16 22:46:52,057 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 25 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:46:52,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 138 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 111 Invalid, 0 Unknown, 125 Unchecked, 0.1s Time] [2021-12-16 22:46:52,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-16 22:46:52,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-12-16 22:46:52,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:52,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-12-16 22:46:52,061 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 25 [2021-12-16 22:46:52,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:46:52,061 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-12-16 22:46:52,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:52,065 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-12-16 22:46:52,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-16 22:46:52,065 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:46:52,065 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:46:52,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 22:46:52,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:46:52,266 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:46:52,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:46:52,266 INFO L85 PathProgramCache]: Analyzing trace with hash -903462723, now seen corresponding path program 1 times [2021-12-16 22:46:52,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:46:52,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626304816] [2021-12-16 22:46:52,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:46:52,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:46:52,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:46:52,317 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 22:46:52,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:46:52,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626304816] [2021-12-16 22:46:52,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626304816] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:46:52,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741865559] [2021-12-16 22:46:52,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:46:52,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:46:52,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:46:52,320 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) [2021-12-16 22:46:52,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 22:46:52,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:46:52,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 22:46:52,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:46:52,405 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 22:46:52,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:46:52,482 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 22:46:52,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741865559] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:46:52,483 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:46:52,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-12-16 22:46:52,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91943661] [2021-12-16 22:46:52,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:46:52,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-16 22:46:52,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:46:52,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-16 22:46:52,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-12-16 22:46:52,484 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:52,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:46:52,550 INFO L93 Difference]: Finished difference Result 101 states and 114 transitions. [2021-12-16 22:46:52,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 22:46:52,550 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-16 22:46:52,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:46:52,554 INFO L225 Difference]: With dead ends: 101 [2021-12-16 22:46:52,554 INFO L226 Difference]: Without dead ends: 85 [2021-12-16 22:46:52,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-12-16 22:46:52,556 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 133 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:46:52,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 44 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:46:52,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-16 22:46:52,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 42. [2021-12-16 22:46:52,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.170731707317073) internal successors, (48), 41 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:52,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2021-12-16 22:46:52,566 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 28 [2021-12-16 22:46:52,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:46:52,566 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2021-12-16 22:46:52,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:52,567 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2021-12-16 22:46:52,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-16 22:46:52,567 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:46:52,567 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:46:52,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 22:46:52,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:46:52,784 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:46:52,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:46:52,785 INFO L85 PathProgramCache]: Analyzing trace with hash 2111640895, now seen corresponding path program 4 times [2021-12-16 22:46:52,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:46:52,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862405482] [2021-12-16 22:46:52,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:46:52,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:46:52,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:46:52,887 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:52,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:46:52,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862405482] [2021-12-16 22:46:52,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862405482] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:46:52,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656090619] [2021-12-16 22:46:52,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 22:46:52,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:46:52,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:46:52,889 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) [2021-12-16 22:46:52,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 22:46:52,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 22:46:52,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:46:52,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-16 22:46:52,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:46:52,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:46:52,997 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-16 22:46:52,998 INFO L388 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 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-16 22:46:53,079 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:53,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:46:53,170 INFO L388 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 16 treesize of output 14 [2021-12-16 22:46:53,174 INFO L388 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 28 treesize of output 24 [2021-12-16 22:46:53,202 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:53,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656090619] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:46:53,203 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:46:53,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 17 [2021-12-16 22:46:53,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791066758] [2021-12-16 22:46:53,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:46:53,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-16 22:46:53,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:46:53,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-16 22:46:53,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-12-16 22:46:53,205 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:53,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:46:53,388 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2021-12-16 22:46:53,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-16 22:46:53,389 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-16 22:46:53,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:46:53,389 INFO L225 Difference]: With dead ends: 78 [2021-12-16 22:46:53,389 INFO L226 Difference]: Without dead ends: 76 [2021-12-16 22:46:53,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 43 SyntacticMatches, 8 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2021-12-16 22:46:53,390 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 57 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:46:53,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 114 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 198 Invalid, 0 Unknown, 8 Unchecked, 0.1s Time] [2021-12-16 22:46:53,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-16 22:46:53,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 47. [2021-12-16 22:46:53,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:53,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2021-12-16 22:46:53,394 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 28 [2021-12-16 22:46:53,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:46:53,394 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2021-12-16 22:46:53,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:53,394 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2021-12-16 22:46:53,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-16 22:46:53,395 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:46:53,395 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:46:53,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 22:46:53,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:46:53,599 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:46:53,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:46:53,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1743746796, now seen corresponding path program 5 times [2021-12-16 22:46:53,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:46:53,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118571186] [2021-12-16 22:46:53,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:46:53,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:46:53,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:46:53,713 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:53,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:46:53,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118571186] [2021-12-16 22:46:53,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118571186] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:46:53,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408054178] [2021-12-16 22:46:53,713 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 22:46:53,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:46:53,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:46:53,714 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) [2021-12-16 22:46:53,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 22:46:53,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-16 22:46:53,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:46:53,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-16 22:46:53,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:46:53,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:46:53,830 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-16 22:46:53,830 INFO L388 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-16 22:46:53,863 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-16 22:46:53,863 INFO L388 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-16 22:46:53,951 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:53,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:46:54,079 INFO L388 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 16 treesize of output 14 [2021-12-16 22:46:54,081 INFO L388 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 28 treesize of output 24 [2021-12-16 22:46:54,107 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 22:46:54,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408054178] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:46:54,108 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:46:54,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 18 [2021-12-16 22:46:54,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463184969] [2021-12-16 22:46:54,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:46:54,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-16 22:46:54,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:46:54,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-16 22:46:54,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-12-16 22:46:54,109 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:54,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:46:54,298 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2021-12-16 22:46:54,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-16 22:46:54,298 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-16 22:46:54,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:46:54,299 INFO L225 Difference]: With dead ends: 68 [2021-12-16 22:46:54,299 INFO L226 Difference]: Without dead ends: 66 [2021-12-16 22:46:54,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 48 SyntacticMatches, 10 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-12-16 22:46:54,299 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 58 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:46:54,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 119 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:46:54,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-16 22:46:54,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2021-12-16 22:46:54,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:54,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2021-12-16 22:46:54,303 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 31 [2021-12-16 22:46:54,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:46:54,303 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2021-12-16 22:46:54,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:54,303 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2021-12-16 22:46:54,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-16 22:46:54,304 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:46:54,304 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:46:54,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-16 22:46:54,515 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,SelfDestructingSolverStorable9 [2021-12-16 22:46:54,516 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:46:54,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:46:54,516 INFO L85 PathProgramCache]: Analyzing trace with hash 2074446645, now seen corresponding path program 6 times [2021-12-16 22:46:54,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:46:54,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184331225] [2021-12-16 22:46:54,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:46:54,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:46:54,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:46:54,671 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:54,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:46:54,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184331225] [2021-12-16 22:46:54,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184331225] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:46:54,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463393963] [2021-12-16 22:46:54,671 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 22:46:54,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:46:54,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:46:54,672 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) [2021-12-16 22:46:54,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 22:46:54,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-16 22:46:54,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:46:54,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-16 22:46:54,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:46:54,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-16 22:46:54,876 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:54,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:46:54,964 INFO L388 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 16 treesize of output 14 [2021-12-16 22:46:54,966 INFO L388 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 28 treesize of output 24 [2021-12-16 22:46:54,991 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:54,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463393963] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:46:54,991 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:46:54,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2021-12-16 22:46:54,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207047303] [2021-12-16 22:46:54,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:46:54,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-16 22:46:54,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:46:54,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-16 22:46:54,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-12-16 22:46:54,992 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:55,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:46:55,270 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2021-12-16 22:46:55,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-16 22:46:55,270 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-16 22:46:55,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:46:55,271 INFO L225 Difference]: With dead ends: 56 [2021-12-16 22:46:55,271 INFO L226 Difference]: Without dead ends: 54 [2021-12-16 22:46:55,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=184, Invalid=1148, Unknown=0, NotChecked=0, Total=1332 [2021-12-16 22:46:55,272 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 53 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:46:55,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 134 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 22:46:55,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-16 22:46:55,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2021-12-16 22:46:55,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:55,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2021-12-16 22:46:55,278 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 32 [2021-12-16 22:46:55,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:46:55,279 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2021-12-16 22:46:55,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:55,279 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2021-12-16 22:46:55,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-16 22:46:55,279 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:46:55,279 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:46:55,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-16 22:46:55,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:46:55,480 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:46:55,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:46:55,480 INFO L85 PathProgramCache]: Analyzing trace with hash -743041493, now seen corresponding path program 7 times [2021-12-16 22:46:55,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:46:55,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303087625] [2021-12-16 22:46:55,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:46:55,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:46:55,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:46:55,563 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 19 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:55,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:46:55,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303087625] [2021-12-16 22:46:55,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303087625] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:46:55,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301520142] [2021-12-16 22:46:55,565 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 22:46:55,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:46:55,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:46:55,566 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) [2021-12-16 22:46:55,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 22:46:55,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:46:55,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 22:46:55,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:46:55,738 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 32 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:55,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:46:55,796 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 32 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:55,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301520142] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:46:55,797 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:46:55,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-12-16 22:46:55,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364169715] [2021-12-16 22:46:55,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:46:55,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-16 22:46:55,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:46:55,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-16 22:46:55,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-12-16 22:46:55,798 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:55,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:46:55,890 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2021-12-16 22:46:55,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 22:46:55,891 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-16 22:46:55,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:46:55,891 INFO L225 Difference]: With dead ends: 82 [2021-12-16 22:46:55,891 INFO L226 Difference]: Without dead ends: 58 [2021-12-16 22:46:55,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-12-16 22:46:55,892 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 65 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:46:55,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 82 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:46:55,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-16 22:46:55,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 50. [2021-12-16 22:46:55,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:55,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2021-12-16 22:46:55,899 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 36 [2021-12-16 22:46:55,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:46:55,899 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2021-12-16 22:46:55,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:55,899 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2021-12-16 22:46:55,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-16 22:46:55,904 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:46:55,904 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:46:55,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-16 22:46:56,107 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,SelfDestructingSolverStorable11 [2021-12-16 22:46:56,107 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:46:56,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:46:56,108 INFO L85 PathProgramCache]: Analyzing trace with hash 632743168, now seen corresponding path program 8 times [2021-12-16 22:46:56,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:46:56,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067658836] [2021-12-16 22:46:56,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:46:56,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:46:56,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:46:56,228 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:56,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:46:56,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067658836] [2021-12-16 22:46:56,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067658836] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:46:56,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329023892] [2021-12-16 22:46:56,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:46:56,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:46:56,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:46:56,230 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:46:56,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 22:46:56,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:46:56,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:46:56,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-16 22:46:56,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:46:56,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:46:56,450 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:56,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:46:56,527 INFO L388 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 16 treesize of output 14 [2021-12-16 22:46:56,529 INFO L388 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 28 treesize of output 24 [2021-12-16 22:46:56,583 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:56,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329023892] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:46:56,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:46:56,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 20 [2021-12-16 22:46:56,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205273502] [2021-12-16 22:46:56,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:46:56,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-16 22:46:56,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:46:56,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-16 22:46:56,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-12-16 22:46:56,585 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:56,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:46:56,873 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2021-12-16 22:46:56,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-16 22:46:56,874 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-16 22:46:56,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:46:56,874 INFO L225 Difference]: With dead ends: 60 [2021-12-16 22:46:56,874 INFO L226 Difference]: Without dead ends: 58 [2021-12-16 22:46:56,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 66 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2021-12-16 22:46:56,875 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 38 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:46:56,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 132 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 22:46:56,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-16 22:46:56,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2021-12-16 22:46:56,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 53 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:56,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2021-12-16 22:46:56,879 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 39 [2021-12-16 22:46:56,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:46:56,880 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2021-12-16 22:46:56,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:56,880 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2021-12-16 22:46:56,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-16 22:46:56,880 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:46:56,880 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:46:56,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-16 22:46:57,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-16 22:46:57,083 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:46:57,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:46:57,084 INFO L85 PathProgramCache]: Analyzing trace with hash -23096714, now seen corresponding path program 9 times [2021-12-16 22:46:57,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:46:57,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336843558] [2021-12-16 22:46:57,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:46:57,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:46:57,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:46:57,173 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 33 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:57,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:46:57,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336843558] [2021-12-16 22:46:57,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336843558] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:46:57,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325656046] [2021-12-16 22:46:57,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:46:57,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:46:57,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:46:57,174 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:46:57,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-16 22:46:57,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-16 22:46:57,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:46:57,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 22:46:57,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:46:57,400 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 50 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:57,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:46:57,472 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 50 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:57,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325656046] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:46:57,473 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:46:57,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2021-12-16 22:46:57,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146128443] [2021-12-16 22:46:57,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:46:57,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-16 22:46:57,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:46:57,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-16 22:46:57,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2021-12-16 22:46:57,474 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 23 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:57,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:46:57,564 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2021-12-16 22:46:57,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-16 22:46:57,565 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 23 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-16 22:46:57,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:46:57,565 INFO L225 Difference]: With dead ends: 90 [2021-12-16 22:46:57,565 INFO L226 Difference]: Without dead ends: 62 [2021-12-16 22:46:57,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2021-12-16 22:46:57,566 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 118 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:46:57,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 77 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:46:57,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-16 22:46:57,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2021-12-16 22:46:57,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 53 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:57,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2021-12-16 22:46:57,570 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 43 [2021-12-16 22:46:57,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:46:57,571 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2021-12-16 22:46:57,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 23 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:57,571 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2021-12-16 22:46:57,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-16 22:46:57,571 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:46:57,571 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:46:57,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-16 22:46:57,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-16 22:46:57,783 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:46:57,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:46:57,784 INFO L85 PathProgramCache]: Analyzing trace with hash 219503105, now seen corresponding path program 10 times [2021-12-16 22:46:57,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:46:57,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902847195] [2021-12-16 22:46:57,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:46:57,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:46:57,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:46:57,925 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:57,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:46:57,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902847195] [2021-12-16 22:46:57,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902847195] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:46:57,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71642810] [2021-12-16 22:46:57,926 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 22:46:57,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:46:57,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:46:57,927 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:46:57,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-16 22:46:57,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 22:46:57,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:46:57,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-16 22:46:57,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:46:58,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:46:58,185 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:58,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:46:58,269 INFO L388 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 16 treesize of output 14 [2021-12-16 22:46:58,270 INFO L388 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 28 treesize of output 24 [2021-12-16 22:46:58,334 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:58,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71642810] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:46:58,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:46:58,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 23 [2021-12-16 22:46:58,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86921147] [2021-12-16 22:46:58,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:46:58,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-16 22:46:58,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:46:58,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-16 22:46:58,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-12-16 22:46:58,336 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 23 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:58,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:46:58,682 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2021-12-16 22:46:58,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-16 22:46:58,682 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 23 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-12-16 22:46:58,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:46:58,683 INFO L225 Difference]: With dead ends: 64 [2021-12-16 22:46:58,683 INFO L226 Difference]: Without dead ends: 62 [2021-12-16 22:46:58,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 79 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2021-12-16 22:46:58,684 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 43 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:46:58,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 212 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 22:46:58,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-16 22:46:58,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2021-12-16 22:46:58,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.087719298245614) internal successors, (62), 57 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:58,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2021-12-16 22:46:58,687 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 46 [2021-12-16 22:46:58,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:46:58,688 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2021-12-16 22:46:58,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 23 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:58,688 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2021-12-16 22:46:58,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-16 22:46:58,688 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:46:58,688 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:46:58,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-16 22:46:58,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-16 22:46:58,903 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:46:58,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:46:58,904 INFO L85 PathProgramCache]: Analyzing trace with hash 2009702135, now seen corresponding path program 11 times [2021-12-16 22:46:58,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:46:58,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826651549] [2021-12-16 22:46:58,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:46:58,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:46:58,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:46:59,011 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 51 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:59,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:46:59,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826651549] [2021-12-16 22:46:59,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826651549] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:46:59,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663559333] [2021-12-16 22:46:59,011 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 22:46:59,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:46:59,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:46:59,012 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:46:59,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-16 22:46:59,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-16 22:46:59,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:46:59,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-16 22:46:59,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:46:59,277 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 72 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:59,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:46:59,362 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 72 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:59,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663559333] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:46:59,363 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:46:59,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2021-12-16 22:46:59,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594645378] [2021-12-16 22:46:59,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:46:59,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-16 22:46:59,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:46:59,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-16 22:46:59,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2021-12-16 22:46:59,364 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 26 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:59,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:46:59,491 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2021-12-16 22:46:59,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-16 22:46:59,491 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 26 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-12-16 22:46:59,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:46:59,492 INFO L225 Difference]: With dead ends: 98 [2021-12-16 22:46:59,492 INFO L226 Difference]: Without dead ends: 66 [2021-12-16 22:46:59,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2021-12-16 22:46:59,493 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 129 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:46:59,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 101 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:46:59,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-16 22:46:59,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2021-12-16 22:46:59,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 57 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:59,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2021-12-16 22:46:59,496 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 50 [2021-12-16 22:46:59,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:46:59,496 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2021-12-16 22:46:59,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 26 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:59,496 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2021-12-16 22:46:59,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-16 22:46:59,496 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:46:59,497 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:46:59,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-16 22:46:59,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:46:59,707 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:46:59,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:46:59,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1663478516, now seen corresponding path program 12 times [2021-12-16 22:46:59,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:46:59,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174028452] [2021-12-16 22:46:59,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:46:59,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:46:59,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:46:59,885 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:59,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:46:59,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174028452] [2021-12-16 22:46:59,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174028452] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:46:59,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336606407] [2021-12-16 22:46:59,885 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 22:46:59,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:46:59,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:46:59,886 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:46:59,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-16 22:46:59,973 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-16 22:46:59,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:46:59,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-16 22:46:59,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:47:00,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:47:00,584 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-16 22:47:00,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2021-12-16 22:47:00,604 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 66 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:00,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:47:01,134 INFO L388 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 18 treesize of output 16 [2021-12-16 22:47:01,136 INFO L388 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 34 treesize of output 28 [2021-12-16 22:47:01,174 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 60 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:01,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336606407] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:47:01,174 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:47:01,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 47 [2021-12-16 22:47:01,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675776974] [2021-12-16 22:47:01,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:47:01,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-16 22:47:01,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:47:01,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-16 22:47:01,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1886, Unknown=0, NotChecked=0, Total=2162 [2021-12-16 22:47:01,175 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 47 states, 47 states have (on average 2.8085106382978724) internal successors, (132), 47 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:01,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:47:01,875 INFO L93 Difference]: Finished difference Result 91 states and 94 transitions. [2021-12-16 22:47:01,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-16 22:47:01,882 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.8085106382978724) internal successors, (132), 47 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-12-16 22:47:01,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:47:01,887 INFO L225 Difference]: With dead ends: 91 [2021-12-16 22:47:01,887 INFO L226 Difference]: Without dead ends: 59 [2021-12-16 22:47:01,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=671, Invalid=5029, Unknown=0, NotChecked=0, Total=5700 [2021-12-16 22:47:01,889 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 43 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:47:01,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 229 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 241 Invalid, 0 Unknown, 134 Unchecked, 0.1s Time] [2021-12-16 22:47:01,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-16 22:47:01,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2021-12-16 22:47:01,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:01,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2021-12-16 22:47:01,894 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 53 [2021-12-16 22:47:01,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:47:01,894 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2021-12-16 22:47:01,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.8085106382978724) internal successors, (132), 47 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:01,894 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2021-12-16 22:47:01,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-16 22:47:01,894 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:47:01,895 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:47:01,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-16 22:47:02,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-16 22:47:02,103 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:47:02,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:47:02,104 INFO L85 PathProgramCache]: Analyzing trace with hash 2083482327, now seen corresponding path program 13 times [2021-12-16 22:47:02,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:47:02,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179071825] [2021-12-16 22:47:02,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:02,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:47:02,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:02,317 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:02,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:47:02,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179071825] [2021-12-16 22:47:02,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179071825] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:47:02,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560172683] [2021-12-16 22:47:02,318 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 22:47:02,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:02,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:47:02,319 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:47:02,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-16 22:47:02,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:02,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-16 22:47:02,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:47:02,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:47:02,506 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-16 22:47:02,506 INFO L388 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 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-16 22:47:02,710 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:02,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:47:02,840 INFO L388 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 16 treesize of output 14 [2021-12-16 22:47:02,841 INFO L388 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 28 treesize of output 24 [2021-12-16 22:47:02,900 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:02,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560172683] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:47:02,900 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:47:02,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 20] total 29 [2021-12-16 22:47:02,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422144044] [2021-12-16 22:47:02,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:47:02,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-16 22:47:02,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:47:02,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-16 22:47:02,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2021-12-16 22:47:02,902 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand has 29 states, 29 states have (on average 3.103448275862069) internal successors, (90), 29 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:03,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:47:03,442 INFO L93 Difference]: Finished difference Result 107 states and 110 transitions. [2021-12-16 22:47:03,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-16 22:47:03,442 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.103448275862069) internal successors, (90), 29 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-12-16 22:47:03,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:47:03,443 INFO L225 Difference]: With dead ends: 107 [2021-12-16 22:47:03,443 INFO L226 Difference]: Without dead ends: 105 [2021-12-16 22:47:03,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 95 SyntacticMatches, 8 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=240, Invalid=2516, Unknown=0, NotChecked=0, Total=2756 [2021-12-16 22:47:03,444 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 84 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 22:47:03,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 415 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 855 Invalid, 0 Unknown, 47 Unchecked, 0.3s Time] [2021-12-16 22:47:03,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-16 22:47:03,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 65. [2021-12-16 22:47:03,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:03,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2021-12-16 22:47:03,447 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 56 [2021-12-16 22:47:03,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:47:03,447 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2021-12-16 22:47:03,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.103448275862069) internal successors, (90), 29 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:03,448 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2021-12-16 22:47:03,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-16 22:47:03,448 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:47:03,448 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:47:03,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-16 22:47:03,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-16 22:47:03,649 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:47:03,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:47:03,649 INFO L85 PathProgramCache]: Analyzing trace with hash 892333226, now seen corresponding path program 2 times [2021-12-16 22:47:03,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:47:03,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760290788] [2021-12-16 22:47:03,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:03,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:47:03,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:03,707 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-16 22:47:03,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:47:03,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760290788] [2021-12-16 22:47:03,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760290788] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:47:03,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754488277] [2021-12-16 22:47:03,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:47:03,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:03,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:47:03,709 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:47:03,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-16 22:47:03,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:47:03,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:47:03,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-16 22:47:03,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:47:03,844 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-16 22:47:03,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:47:04,038 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-16 22:47:04,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754488277] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:47:04,039 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:47:04,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2021-12-16 22:47:04,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510699519] [2021-12-16 22:47:04,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:47:04,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-16 22:47:04,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:47:04,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-16 22:47:04,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-12-16 22:47:04,040 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 21 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:04,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:47:04,182 INFO L93 Difference]: Finished difference Result 231 states and 255 transitions. [2021-12-16 22:47:04,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-16 22:47:04,182 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 21 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-12-16 22:47:04,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:47:04,183 INFO L225 Difference]: With dead ends: 231 [2021-12-16 22:47:04,183 INFO L226 Difference]: Without dead ends: 199 [2021-12-16 22:47:04,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-12-16 22:47:04,184 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 253 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:47:04,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 77 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:47:04,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-12-16 22:47:04,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 93. [2021-12-16 22:47:04,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.141304347826087) internal successors, (105), 92 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:04,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2021-12-16 22:47:04,189 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 59 [2021-12-16 22:47:04,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:47:04,189 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2021-12-16 22:47:04,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 21 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:04,190 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2021-12-16 22:47:04,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-16 22:47:04,190 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:47:04,190 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:47:04,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-16 22:47:04,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:04,395 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:47:04,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:47:04,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1593933100, now seen corresponding path program 14 times [2021-12-16 22:47:04,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:47:04,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236442978] [2021-12-16 22:47:04,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:04,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:47:04,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:04,620 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:04,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:47:04,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236442978] [2021-12-16 22:47:04,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236442978] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:47:04,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656374516] [2021-12-16 22:47:04,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:47:04,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:04,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:47:04,622 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:47:04,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-16 22:47:04,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:47:04,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:47:04,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-16 22:47:04,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:47:04,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:47:04,786 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-16 22:47:04,787 INFO L388 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-16 22:47:04,819 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-16 22:47:04,819 INFO L388 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-16 22:47:05,005 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 2 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:05,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:47:05,200 INFO L388 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 16 treesize of output 14 [2021-12-16 22:47:05,202 INFO L388 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 28 treesize of output 24 [2021-12-16 22:47:05,259 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 188 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 22:47:05,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656374516] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:47:05,260 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:47:05,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 21] total 30 [2021-12-16 22:47:05,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752181935] [2021-12-16 22:47:05,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:47:05,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-16 22:47:05,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:47:05,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-16 22:47:05,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2021-12-16 22:47:05,261 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 30 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:05,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:47:05,753 INFO L93 Difference]: Finished difference Result 130 states and 142 transitions. [2021-12-16 22:47:05,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-16 22:47:05,754 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 30 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-12-16 22:47:05,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:47:05,754 INFO L225 Difference]: With dead ends: 130 [2021-12-16 22:47:05,754 INFO L226 Difference]: Without dead ends: 128 [2021-12-16 22:47:05,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 100 SyntacticMatches, 10 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=226, Invalid=2126, Unknown=0, NotChecked=0, Total=2352 [2021-12-16 22:47:05,755 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 76 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 22:47:05,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 374 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 22:47:05,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-16 22:47:05,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 92. [2021-12-16 22:47:05,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.1428571428571428) internal successors, (104), 91 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:05,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 104 transitions. [2021-12-16 22:47:05,760 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 104 transitions. Word has length 59 [2021-12-16 22:47:05,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:47:05,760 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 104 transitions. [2021-12-16 22:47:05,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 30 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:05,761 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 104 transitions. [2021-12-16 22:47:05,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-16 22:47:05,761 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:47:05,761 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:47:05,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-16 22:47:05,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:05,971 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:47:05,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:47:05,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1222421299, now seen corresponding path program 15 times [2021-12-16 22:47:05,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:47:05,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773934237] [2021-12-16 22:47:05,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:05,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:47:05,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:06,171 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:06,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:47:06,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773934237] [2021-12-16 22:47:06,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773934237] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:47:06,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280771199] [2021-12-16 22:47:06,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:47:06,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:06,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:47:06,173 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:47:06,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-16 22:47:06,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-16 22:47:06,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:47:06,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-16 22:47:06,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:47:06,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:47:07,044 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-16 22:47:07,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2021-12-16 22:47:07,067 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 91 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:07,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:47:07,857 INFO L388 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 18 treesize of output 16 [2021-12-16 22:47:07,864 INFO L388 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 34 treesize of output 28 [2021-12-16 22:47:07,900 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 84 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:07,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280771199] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:47:07,900 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:47:07,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 52 [2021-12-16 22:47:07,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475851432] [2021-12-16 22:47:07,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:47:07,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-16 22:47:07,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:47:07,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-16 22:47:07,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=2322, Unknown=1, NotChecked=0, Total=2652 [2021-12-16 22:47:07,902 INFO L87 Difference]: Start difference. First operand 92 states and 104 transitions. Second operand has 52 states, 52 states have (on average 2.8846153846153846) internal successors, (150), 52 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:08,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:47:08,512 INFO L93 Difference]: Finished difference Result 129 states and 141 transitions. [2021-12-16 22:47:08,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-16 22:47:08,514 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.8846153846153846) internal successors, (150), 52 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-12-16 22:47:08,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:47:08,514 INFO L225 Difference]: With dead ends: 129 [2021-12-16 22:47:08,514 INFO L226 Difference]: Without dead ends: 93 [2021-12-16 22:47:08,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=662, Invalid=5189, Unknown=1, NotChecked=0, Total=5852 [2021-12-16 22:47:08,516 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 49 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:47:08,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 290 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 304 Invalid, 0 Unknown, 96 Unchecked, 0.1s Time] [2021-12-16 22:47:08,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-16 22:47:08,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-12-16 22:47:08,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.1318681318681318) internal successors, (103), 91 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:08,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2021-12-16 22:47:08,521 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 60 [2021-12-16 22:47:08,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:47:08,522 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2021-12-16 22:47:08,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.8846153846153846) internal successors, (150), 52 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:08,522 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2021-12-16 22:47:08,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-16 22:47:08,522 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:47:08,522 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:47:08,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-16 22:47:08,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:08,739 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:47:08,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:47:08,739 INFO L85 PathProgramCache]: Analyzing trace with hash -481676126, now seen corresponding path program 16 times [2021-12-16 22:47:08,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:47:08,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465026975] [2021-12-16 22:47:08,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:08,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:47:08,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:08,955 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:08,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:47:08,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465026975] [2021-12-16 22:47:08,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465026975] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:47:08,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339229535] [2021-12-16 22:47:08,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 22:47:08,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:08,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:47:08,969 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:47:08,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-16 22:47:09,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 22:47:09,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:47:09,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-16 22:47:09,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:47:09,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:47:09,156 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-16 22:47:09,159 INFO L388 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 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-16 22:47:09,407 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:09,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:47:09,578 INFO L388 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 16 treesize of output 14 [2021-12-16 22:47:09,579 INFO L388 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 28 treesize of output 24 [2021-12-16 22:47:09,648 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:09,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339229535] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:47:09,648 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:47:09,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 22] total 32 [2021-12-16 22:47:09,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639095792] [2021-12-16 22:47:09,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:47:09,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-16 22:47:09,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:47:09,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-16 22:47:09,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2021-12-16 22:47:09,650 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand has 32 states, 32 states have (on average 3.15625) internal successors, (101), 32 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:10,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:47:10,289 INFO L93 Difference]: Finished difference Result 143 states and 154 transitions. [2021-12-16 22:47:10,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-16 22:47:10,290 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.15625) internal successors, (101), 32 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-16 22:47:10,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:47:10,290 INFO L225 Difference]: With dead ends: 143 [2021-12-16 22:47:10,290 INFO L226 Difference]: Without dead ends: 141 [2021-12-16 22:47:10,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 107 SyntacticMatches, 9 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=267, Invalid=3155, Unknown=0, NotChecked=0, Total=3422 [2021-12-16 22:47:10,291 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 106 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 22:47:10,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 482 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1051 Invalid, 0 Unknown, 5 Unchecked, 0.4s Time] [2021-12-16 22:47:10,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-12-16 22:47:10,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 97. [2021-12-16 22:47:10,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.125) internal successors, (108), 96 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:10,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 108 transitions. [2021-12-16 22:47:10,297 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 108 transitions. Word has length 63 [2021-12-16 22:47:10,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:47:10,297 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 108 transitions. [2021-12-16 22:47:10,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.15625) internal successors, (101), 32 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:10,297 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 108 transitions. [2021-12-16 22:47:10,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-16 22:47:10,298 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:47:10,298 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:47:10,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-16 22:47:10,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-16 22:47:10,511 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:47:10,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:47:10,512 INFO L85 PathProgramCache]: Analyzing trace with hash -484194131, now seen corresponding path program 17 times [2021-12-16 22:47:10,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:47:10,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375124653] [2021-12-16 22:47:10,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:10,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:47:10,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:10,733 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:10,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:47:10,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375124653] [2021-12-16 22:47:10,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375124653] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:47:10,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042373415] [2021-12-16 22:47:10,733 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 22:47:10,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:10,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:47:10,734 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:47:10,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-16 22:47:10,823 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-16 22:47:10,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:47:10,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-16 22:47:10,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:47:10,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:47:10,940 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-16 22:47:10,940 INFO L388 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-16 22:47:10,971 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-16 22:47:10,971 INFO L388 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-16 22:47:11,235 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 2 proven. 241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:11,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:47:11,430 INFO L388 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 16 treesize of output 14 [2021-12-16 22:47:11,432 INFO L388 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 28 treesize of output 24 [2021-12-16 22:47:11,505 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 22:47:11,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042373415] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:47:11,506 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:47:11,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 23] total 33 [2021-12-16 22:47:11,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628269037] [2021-12-16 22:47:11,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:47:11,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-16 22:47:11,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:47:11,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-16 22:47:11,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-12-16 22:47:11,507 INFO L87 Difference]: Start difference. First operand 97 states and 108 transitions. Second operand has 33 states, 33 states have (on average 3.212121212121212) internal successors, (106), 33 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:12,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:47:12,119 INFO L93 Difference]: Finished difference Result 138 states and 149 transitions. [2021-12-16 22:47:12,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-16 22:47:12,120 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.212121212121212) internal successors, (106), 33 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-16 22:47:12,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:47:12,120 INFO L225 Difference]: With dead ends: 138 [2021-12-16 22:47:12,120 INFO L226 Difference]: Without dead ends: 136 [2021-12-16 22:47:12,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 112 SyntacticMatches, 11 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=248, Invalid=2614, Unknown=0, NotChecked=0, Total=2862 [2021-12-16 22:47:12,121 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 82 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 1218 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 1311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 22:47:12,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 520 Invalid, 1311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1218 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 22:47:12,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-12-16 22:47:12,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 96. [2021-12-16 22:47:12,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.1263157894736842) internal successors, (107), 95 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:12,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 107 transitions. [2021-12-16 22:47:12,127 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 107 transitions. Word has length 66 [2021-12-16 22:47:12,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:47:12,127 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 107 transitions. [2021-12-16 22:47:12,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.212121212121212) internal successors, (106), 33 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:12,128 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 107 transitions. [2021-12-16 22:47:12,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-16 22:47:12,128 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:47:12,128 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:47:12,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-16 22:47:12,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-16 22:47:12,345 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:47:12,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:47:12,345 INFO L85 PathProgramCache]: Analyzing trace with hash 484327704, now seen corresponding path program 18 times [2021-12-16 22:47:12,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:47:12,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792178332] [2021-12-16 22:47:12,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:12,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:47:12,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:12,570 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:12,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:47:12,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792178332] [2021-12-16 22:47:12,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792178332] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:47:12,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907718360] [2021-12-16 22:47:12,570 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 22:47:12,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:12,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:47:12,571 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:47:12,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-16 22:47:12,711 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-12-16 22:47:12,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:47:12,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-16 22:47:12,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:47:12,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:47:13,534 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-16 22:47:13,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2021-12-16 22:47:13,556 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 120 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:13,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:47:14,259 INFO L388 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 18 treesize of output 16 [2021-12-16 22:47:14,262 INFO L388 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 34 treesize of output 28 [2021-12-16 22:47:14,311 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 112 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:14,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907718360] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:47:14,312 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:47:14,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 57 [2021-12-16 22:47:14,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568432404] [2021-12-16 22:47:14,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:47:14,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-16 22:47:14,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:47:14,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-16 22:47:14,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=2805, Unknown=0, NotChecked=0, Total=3192 [2021-12-16 22:47:14,313 INFO L87 Difference]: Start difference. First operand 96 states and 107 transitions. Second operand has 57 states, 57 states have (on average 2.9473684210526314) internal successors, (168), 57 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:15,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:47:15,032 INFO L93 Difference]: Finished difference Result 137 states and 148 transitions. [2021-12-16 22:47:15,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-16 22:47:15,033 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.9473684210526314) internal successors, (168), 57 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-16 22:47:15,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:47:15,033 INFO L225 Difference]: With dead ends: 137 [2021-12-16 22:47:15,033 INFO L226 Difference]: Without dead ends: 97 [2021-12-16 22:47:15,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1347 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=779, Invalid=6361, Unknown=0, NotChecked=0, Total=7140 [2021-12-16 22:47:15,035 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 39 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:47:15,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 401 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 396 Invalid, 0 Unknown, 127 Unchecked, 0.1s Time] [2021-12-16 22:47:15,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-12-16 22:47:15,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2021-12-16 22:47:15,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.1157894736842104) internal successors, (106), 95 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:15,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2021-12-16 22:47:15,041 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 67 [2021-12-16 22:47:15,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:47:15,041 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2021-12-16 22:47:15,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.9473684210526314) internal successors, (168), 57 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:15,042 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2021-12-16 22:47:15,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-16 22:47:15,042 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:47:15,042 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:47:15,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-16 22:47:15,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:15,251 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:47:15,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:47:15,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1368860765, now seen corresponding path program 19 times [2021-12-16 22:47:15,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:47:15,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994030571] [2021-12-16 22:47:15,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:15,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:47:15,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:15,499 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:15,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:47:15,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994030571] [2021-12-16 22:47:15,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994030571] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:47:15,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461032409] [2021-12-16 22:47:15,500 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 22:47:15,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:15,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:47:15,501 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:47:15,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-16 22:47:15,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:15,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-16 22:47:15,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:47:15,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:47:15,692 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-16 22:47:15,692 INFO L388 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 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-16 22:47:15,962 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:15,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:47:16,112 INFO L388 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 16 treesize of output 14 [2021-12-16 22:47:16,114 INFO L388 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 28 treesize of output 24 [2021-12-16 22:47:16,189 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:16,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461032409] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:47:16,190 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:47:16,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 24] total 35 [2021-12-16 22:47:16,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416113581] [2021-12-16 22:47:16,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:47:16,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-16 22:47:16,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:47:16,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-16 22:47:16,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1081, Unknown=0, NotChecked=0, Total=1190 [2021-12-16 22:47:16,191 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand has 35 states, 35 states have (on average 3.2) internal successors, (112), 35 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:16,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:47:16,936 INFO L93 Difference]: Finished difference Result 151 states and 161 transitions. [2021-12-16 22:47:16,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-16 22:47:16,936 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.2) internal successors, (112), 35 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-12-16 22:47:16,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:47:16,937 INFO L225 Difference]: With dead ends: 151 [2021-12-16 22:47:16,937 INFO L226 Difference]: Without dead ends: 149 [2021-12-16 22:47:16,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 120 SyntacticMatches, 9 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=294, Invalid=3866, Unknown=0, NotChecked=0, Total=4160 [2021-12-16 22:47:16,938 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 98 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 1269 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 1380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 22:47:16,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 580 Invalid, 1380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1269 Invalid, 0 Unknown, 5 Unchecked, 0.4s Time] [2021-12-16 22:47:16,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-12-16 22:47:16,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 101. [2021-12-16 22:47:16,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.11) internal successors, (111), 100 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:16,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2021-12-16 22:47:16,945 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 70 [2021-12-16 22:47:16,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:47:16,945 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2021-12-16 22:47:16,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.2) internal successors, (112), 35 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:16,945 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2021-12-16 22:47:16,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-16 22:47:16,946 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:47:16,946 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:47:16,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-16 22:47:17,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:17,159 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:47:17,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:47:17,160 INFO L85 PathProgramCache]: Analyzing trace with hash 2098049336, now seen corresponding path program 20 times [2021-12-16 22:47:17,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:47:17,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949609207] [2021-12-16 22:47:17,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:17,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:47:17,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:17,467 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:17,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:47:17,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949609207] [2021-12-16 22:47:17,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949609207] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:47:17,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048371015] [2021-12-16 22:47:17,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:47:17,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:17,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:47:17,469 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:47:17,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-16 22:47:17,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:47:17,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:47:17,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-16 22:47:17,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:47:17,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:47:17,666 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-16 22:47:17,667 INFO L388 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-16 22:47:17,746 INFO L354 Elim1Store]: treesize reduction 80, result has 20.8 percent of original size [2021-12-16 22:47:17,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 38 [2021-12-16 22:47:20,313 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 2 proven. 302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:20,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:47:20,868 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_530| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_530| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (and (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_530| 4)) 0) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 32)) 0) (< 7 |v_ULTIMATE.start_main_~i~0#1_530|)))) is different from false [2021-12-16 22:47:20,873 INFO L388 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 27 treesize of output 25 [2021-12-16 22:47:20,876 INFO L388 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 53 treesize of output 49 [2021-12-16 22:47:20,959 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 294 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2021-12-16 22:47:20,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048371015] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:47:20,960 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:47:20,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 42 [2021-12-16 22:47:20,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808582207] [2021-12-16 22:47:20,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:47:20,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-16 22:47:20,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:47:20,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-16 22:47:20,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1482, Unknown=1, NotChecked=78, Total=1722 [2021-12-16 22:47:20,961 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 42 states, 42 states have (on average 2.9761904761904763) internal successors, (125), 42 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:21,582 WARN L838 $PredicateComparison]: unable to prove that (and (<= 8 |c_ULTIMATE.start_main_~i~0#1|) (<= |c_ULTIMATE.start_main_~i~0#1| 8) (forall ((|v_ULTIMATE.start_main_~i~0#1_530| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_530| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (and (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_530| 4)) 0) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 32)) 0) (< 7 |v_ULTIMATE.start_main_~i~0#1_530|)))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)) 0)) is different from false [2021-12-16 22:47:21,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:47:21,648 INFO L93 Difference]: Finished difference Result 174 states and 186 transitions. [2021-12-16 22:47:21,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-16 22:47:21,649 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.9761904761904763) internal successors, (125), 42 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-12-16 22:47:21,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:47:21,649 INFO L225 Difference]: With dead ends: 174 [2021-12-16 22:47:21,650 INFO L226 Difference]: Without dead ends: 172 [2021-12-16 22:47:21,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 122 SyntacticMatches, 8 SemanticMatches, 49 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=195, Invalid=2163, Unknown=2, NotChecked=190, Total=2550 [2021-12-16 22:47:21,650 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 74 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:47:21,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 468 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 676 Invalid, 0 Unknown, 148 Unchecked, 0.2s Time] [2021-12-16 22:47:21,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-12-16 22:47:21,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 104. [2021-12-16 22:47:21,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.1262135922330097) internal successors, (116), 103 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:21,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 116 transitions. [2021-12-16 22:47:21,658 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 116 transitions. Word has length 73 [2021-12-16 22:47:21,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:47:21,658 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 116 transitions. [2021-12-16 22:47:21,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.9761904761904763) internal successors, (125), 42 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:21,658 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 116 transitions. [2021-12-16 22:47:21,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-16 22:47:21,659 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:47:21,659 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:47:21,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-16 22:47:21,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-16 22:47:21,875 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:47:21,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:47:21,876 INFO L85 PathProgramCache]: Analyzing trace with hash 570522521, now seen corresponding path program 21 times [2021-12-16 22:47:21,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:47:21,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483048981] [2021-12-16 22:47:21,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:21,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:47:21,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:22,158 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 0 proven. 307 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:22,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:47:22,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483048981] [2021-12-16 22:47:22,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483048981] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:47:22,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206886015] [2021-12-16 22:47:22,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:47:22,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:22,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:47:22,160 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:47:22,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-16 22:47:22,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-16 22:47:22,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:47:22,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-16 22:47:22,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:47:22,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:47:23,376 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-16 22:47:23,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2021-12-16 22:47:23,401 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 153 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:23,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:47:24,180 INFO L388 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 18 treesize of output 16 [2021-12-16 22:47:24,183 INFO L388 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 34 treesize of output 28 [2021-12-16 22:47:24,224 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 144 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:24,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206886015] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:47:24,225 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:47:24,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 62 [2021-12-16 22:47:24,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304518333] [2021-12-16 22:47:24,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:47:24,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-12-16 22:47:24,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:47:24,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-12-16 22:47:24,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=3332, Unknown=0, NotChecked=0, Total=3782 [2021-12-16 22:47:24,226 INFO L87 Difference]: Start difference. First operand 104 states and 116 transitions. Second operand has 62 states, 62 states have (on average 3.0) internal successors, (186), 62 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:25,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:47:25,064 INFO L93 Difference]: Finished difference Result 149 states and 161 transitions. [2021-12-16 22:47:25,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-16 22:47:25,065 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.0) internal successors, (186), 62 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-12-16 22:47:25,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:47:25,065 INFO L225 Difference]: With dead ends: 149 [2021-12-16 22:47:25,065 INFO L226 Difference]: Without dead ends: 105 [2021-12-16 22:47:25,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=905, Invalid=7651, Unknown=0, NotChecked=0, Total=8556 [2021-12-16 22:47:25,066 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 57 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:47:25,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 482 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 374 Invalid, 0 Unknown, 176 Unchecked, 0.1s Time] [2021-12-16 22:47:25,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-16 22:47:25,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2021-12-16 22:47:25,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.116504854368932) internal successors, (115), 103 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:25,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 115 transitions. [2021-12-16 22:47:25,079 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 115 transitions. Word has length 74 [2021-12-16 22:47:25,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:47:25,079 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 115 transitions. [2021-12-16 22:47:25,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.0) internal successors, (186), 62 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:25,079 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 115 transitions. [2021-12-16 22:47:25,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-16 22:47:25,079 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:47:25,079 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:47:25,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-16 22:47:25,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-16 22:47:25,288 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:47:25,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:47:25,288 INFO L85 PathProgramCache]: Analyzing trace with hash -121273682, now seen corresponding path program 22 times [2021-12-16 22:47:25,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:47:25,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202962259] [2021-12-16 22:47:25,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:25,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:47:25,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:25,598 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:25,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:47:25,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202962259] [2021-12-16 22:47:25,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202962259] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:47:25,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688571368] [2021-12-16 22:47:25,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 22:47:25,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:25,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:47:25,599 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:47:25,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-16 22:47:25,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 22:47:25,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:47:25,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-16 22:47:25,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:47:25,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:47:25,830 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-16 22:47:25,830 INFO L388 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 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-16 22:47:26,162 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:26,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:47:26,329 INFO L388 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 16 treesize of output 14 [2021-12-16 22:47:26,338 INFO L388 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 28 treesize of output 24 [2021-12-16 22:47:26,423 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:26,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688571368] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:47:26,423 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:47:26,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 26] total 38 [2021-12-16 22:47:26,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205697824] [2021-12-16 22:47:26,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:47:26,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-16 22:47:26,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:47:26,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-16 22:47:26,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1287, Unknown=0, NotChecked=0, Total=1406 [2021-12-16 22:47:26,424 INFO L87 Difference]: Start difference. First operand 104 states and 115 transitions. Second operand has 38 states, 38 states have (on average 3.236842105263158) internal successors, (123), 38 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:27,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:47:27,308 INFO L93 Difference]: Finished difference Result 204 states and 215 transitions. [2021-12-16 22:47:27,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-16 22:47:27,308 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.236842105263158) internal successors, (123), 38 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-16 22:47:27,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:47:27,309 INFO L225 Difference]: With dead ends: 204 [2021-12-16 22:47:27,309 INFO L226 Difference]: Without dead ends: 202 [2021-12-16 22:47:27,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 133 SyntacticMatches, 9 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=334, Invalid=4636, Unknown=0, NotChecked=0, Total=4970 [2021-12-16 22:47:27,309 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 125 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 1448 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 1610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 22:47:27,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 716 Invalid, 1610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1448 Invalid, 0 Unknown, 28 Unchecked, 0.5s Time] [2021-12-16 22:47:27,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-12-16 22:47:27,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 109. [2021-12-16 22:47:27,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1111111111111112) internal successors, (120), 108 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:27,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 120 transitions. [2021-12-16 22:47:27,317 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 120 transitions. Word has length 77 [2021-12-16 22:47:27,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:47:27,317 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 120 transitions. [2021-12-16 22:47:27,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.236842105263158) internal successors, (123), 38 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:27,318 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 120 transitions. [2021-12-16 22:47:27,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-16 22:47:27,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:47:27,318 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:47:27,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-16 22:47:27,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-16 22:47:27,531 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:47:27,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:47:27,532 INFO L85 PathProgramCache]: Analyzing trace with hash 2126096249, now seen corresponding path program 23 times [2021-12-16 22:47:27,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:47:27,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507682346] [2021-12-16 22:47:27,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:27,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:47:27,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:27,841 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:27,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:47:27,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507682346] [2021-12-16 22:47:27,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507682346] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:47:27,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840220190] [2021-12-16 22:47:27,841 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 22:47:27,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:27,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:47:27,843 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:47:27,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-16 22:47:27,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-12-16 22:47:27,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:47:27,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-16 22:47:27,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:47:28,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:47:28,126 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-16 22:47:28,127 INFO L388 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-16 22:47:28,161 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-16 22:47:28,161 INFO L388 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-16 22:47:28,455 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 2 proven. 370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:28,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:47:28,673 INFO L388 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 16 treesize of output 14 [2021-12-16 22:47:28,674 INFO L388 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 28 treesize of output 24 [2021-12-16 22:47:28,757 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 371 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 22:47:28,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840220190] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:47:28,757 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:47:28,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 27] total 39 [2021-12-16 22:47:28,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446161079] [2021-12-16 22:47:28,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:47:28,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-16 22:47:28,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:47:28,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-16 22:47:28,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1357, Unknown=0, NotChecked=0, Total=1482 [2021-12-16 22:47:28,758 INFO L87 Difference]: Start difference. First operand 109 states and 120 transitions. Second operand has 39 states, 39 states have (on average 3.282051282051282) internal successors, (128), 39 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:29,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:47:29,612 INFO L93 Difference]: Finished difference Result 194 states and 205 transitions. [2021-12-16 22:47:29,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-16 22:47:29,613 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.282051282051282) internal successors, (128), 39 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-12-16 22:47:29,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:47:29,613 INFO L225 Difference]: With dead ends: 194 [2021-12-16 22:47:29,613 INFO L226 Difference]: Without dead ends: 192 [2021-12-16 22:47:29,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 138 SyntacticMatches, 11 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=292, Invalid=3740, Unknown=0, NotChecked=0, Total=4032 [2021-12-16 22:47:29,614 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 101 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 1716 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 1826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 22:47:29,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 800 Invalid, 1826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1716 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-16 22:47:29,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-12-16 22:47:29,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 142. [2021-12-16 22:47:29,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.0921985815602837) internal successors, (154), 141 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:29,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 154 transitions. [2021-12-16 22:47:29,626 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 154 transitions. Word has length 80 [2021-12-16 22:47:29,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:47:29,626 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 154 transitions. [2021-12-16 22:47:29,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.282051282051282) internal successors, (128), 39 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:29,627 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 154 transitions. [2021-12-16 22:47:29,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-16 22:47:29,627 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:47:29,627 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:47:29,644 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-12-16 22:47:29,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-16 22:47:29,843 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:47:29,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:47:29,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1219209508, now seen corresponding path program 24 times [2021-12-16 22:47:29,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:47:29,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176413788] [2021-12-16 22:47:29,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:29,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:47:29,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:30,167 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:30,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:47:30,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176413788] [2021-12-16 22:47:30,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176413788] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:47:30,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443937715] [2021-12-16 22:47:30,168 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 22:47:30,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:30,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:47:30,169 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:47:30,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-16 22:47:30,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-12-16 22:47:30,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:47:30,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-16 22:47:30,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:47:30,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:47:31,448 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-16 22:47:31,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2021-12-16 22:47:31,474 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 190 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:31,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:47:32,361 INFO L388 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 18 treesize of output 16 [2021-12-16 22:47:32,363 INFO L388 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 34 treesize of output 28 [2021-12-16 22:47:32,406 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 180 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:32,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443937715] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:47:32,406 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:47:32,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 67 [2021-12-16 22:47:32,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214396518] [2021-12-16 22:47:32,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:47:32,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-12-16 22:47:32,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:47:32,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-12-16 22:47:32,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=518, Invalid=3904, Unknown=0, NotChecked=0, Total=4422 [2021-12-16 22:47:32,408 INFO L87 Difference]: Start difference. First operand 142 states and 154 transitions. Second operand has 67 states, 67 states have (on average 3.044776119402985) internal successors, (204), 67 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:33,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:47:33,711 INFO L93 Difference]: Finished difference Result 190 states and 202 transitions. [2021-12-16 22:47:33,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-16 22:47:33,711 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.044776119402985) internal successors, (204), 67 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-16 22:47:33,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:47:33,712 INFO L225 Difference]: With dead ends: 190 [2021-12-16 22:47:33,712 INFO L226 Difference]: Without dead ends: 142 [2021-12-16 22:47:33,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2372 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1269, Invalid=11163, Unknown=0, NotChecked=0, Total=12432 [2021-12-16 22:47:33,716 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 81 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:47:33,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 448 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 583 Invalid, 0 Unknown, 178 Unchecked, 0.2s Time] [2021-12-16 22:47:33,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-12-16 22:47:33,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-12-16 22:47:33,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.0851063829787233) internal successors, (153), 141 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:33,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 153 transitions. [2021-12-16 22:47:33,731 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 153 transitions. Word has length 81 [2021-12-16 22:47:33,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:47:33,731 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 153 transitions. [2021-12-16 22:47:33,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.044776119402985) internal successors, (204), 67 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:33,732 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 153 transitions. [2021-12-16 22:47:33,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-16 22:47:33,732 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:47:33,732 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:47:33,749 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-12-16 22:47:33,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:33,933 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:47:33,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:47:33,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1155895185, now seen corresponding path program 25 times [2021-12-16 22:47:33,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:47:33,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658329592] [2021-12-16 22:47:33,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:33,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:47:33,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:34,284 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 410 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:34,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:47:34,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658329592] [2021-12-16 22:47:34,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658329592] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:47:34,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941555249] [2021-12-16 22:47:34,284 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 22:47:34,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:34,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:47:34,285 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:47:34,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-16 22:47:34,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:34,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-16 22:47:34,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:47:34,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:47:34,500 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-16 22:47:34,500 INFO L388 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 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-16 22:47:34,866 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 410 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:34,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:47:35,043 INFO L388 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 16 treesize of output 14 [2021-12-16 22:47:35,045 INFO L388 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 28 treesize of output 24 [2021-12-16 22:47:35,137 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 410 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:35,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941555249] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:47:35,137 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:47:35,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 28] total 41 [2021-12-16 22:47:35,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93801789] [2021-12-16 22:47:35,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:47:35,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-16 22:47:35,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:47:35,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-16 22:47:35,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1511, Unknown=0, NotChecked=0, Total=1640 [2021-12-16 22:47:35,138 INFO L87 Difference]: Start difference. First operand 142 states and 153 transitions. Second operand has 41 states, 41 states have (on average 3.268292682926829) internal successors, (134), 41 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:36,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:47:36,108 INFO L93 Difference]: Finished difference Result 207 states and 217 transitions. [2021-12-16 22:47:36,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-16 22:47:36,109 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.268292682926829) internal successors, (134), 41 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-12-16 22:47:36,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:47:36,109 INFO L225 Difference]: With dead ends: 207 [2021-12-16 22:47:36,109 INFO L226 Difference]: Without dead ends: 205 [2021-12-16 22:47:36,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 146 SyntacticMatches, 9 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1320 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=348, Invalid=5504, Unknown=0, NotChecked=0, Total=5852 [2021-12-16 22:47:36,110 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 140 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1596 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 1749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 22:47:36,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 800 Invalid, 1749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1596 Invalid, 0 Unknown, 5 Unchecked, 0.5s Time] [2021-12-16 22:47:36,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-12-16 22:47:36,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 147. [2021-12-16 22:47:36,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.082191780821918) internal successors, (158), 146 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:36,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 158 transitions. [2021-12-16 22:47:36,124 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 158 transitions. Word has length 84 [2021-12-16 22:47:36,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:47:36,124 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 158 transitions. [2021-12-16 22:47:36,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.268292682926829) internal successors, (134), 41 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:36,125 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 158 transitions. [2021-12-16 22:47:36,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-16 22:47:36,125 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:47:36,125 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:47:36,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-12-16 22:47:36,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:36,331 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:47:36,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:47:36,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1686397252, now seen corresponding path program 26 times [2021-12-16 22:47:36,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:47:36,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711408651] [2021-12-16 22:47:36,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:36,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:47:36,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:36,692 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 0 proven. 447 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:36,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:47:36,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711408651] [2021-12-16 22:47:36,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711408651] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:47:36,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992900755] [2021-12-16 22:47:36,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:47:36,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:36,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:47:36,693 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:47:36,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-16 22:47:36,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:47:36,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:47:36,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-16 22:47:36,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:47:36,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:47:36,918 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-16 22:47:36,919 INFO L388 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-16 22:47:37,004 INFO L354 Elim1Store]: treesize reduction 80, result has 20.8 percent of original size [2021-12-16 22:47:37,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 38 [2021-12-16 22:47:41,349 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 2 proven. 445 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:41,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:47:41,941 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_788| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_788| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (and (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_788| 4)) 0) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 40)) 0) (< 9 |v_ULTIMATE.start_main_~i~0#1_788|)))) is different from false [2021-12-16 22:47:41,946 INFO L388 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 27 treesize of output 25 [2021-12-16 22:47:41,949 INFO L388 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 53 treesize of output 49 [2021-12-16 22:47:42,058 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 12 not checked. [2021-12-16 22:47:42,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992900755] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:47:42,058 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:47:42,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 30] total 48 [2021-12-16 22:47:42,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221018927] [2021-12-16 22:47:42,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:47:42,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-16 22:47:42,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:47:42,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-16 22:47:42,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1982, Unknown=1, NotChecked=90, Total=2256 [2021-12-16 22:47:42,059 INFO L87 Difference]: Start difference. First operand 147 states and 158 transitions. Second operand has 48 states, 48 states have (on average 3.0625) internal successors, (147), 48 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:42,786 WARN L838 $PredicateComparison]: unable to prove that (and (<= |c_ULTIMATE.start_main_~i~0#1| 10) (forall ((|v_ULTIMATE.start_main_~i~0#1_788| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_788| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (and (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_788| 4)) 0) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 40)) 0) (< 9 |v_ULTIMATE.start_main_~i~0#1_788|)))) (<= 10 |c_ULTIMATE.start_main_~i~0#1|) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)) 0)) is different from false [2021-12-16 22:47:42,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:47:42,848 INFO L93 Difference]: Finished difference Result 198 states and 209 transitions. [2021-12-16 22:47:42,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-16 22:47:42,848 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.0625) internal successors, (147), 48 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-12-16 22:47:42,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:47:42,849 INFO L225 Difference]: With dead ends: 198 [2021-12-16 22:47:42,849 INFO L226 Difference]: Without dead ends: 196 [2021-12-16 22:47:42,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 147 SyntacticMatches, 9 SemanticMatches, 57 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=225, Invalid=2973, Unknown=2, NotChecked=222, Total=3422 [2021-12-16 22:47:42,849 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 68 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 1240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 211 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 22:47:42,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 626 Invalid, 1240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1009 Invalid, 0 Unknown, 211 Unchecked, 0.3s Time] [2021-12-16 22:47:42,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-12-16 22:47:42,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 146. [2021-12-16 22:47:42,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.0827586206896551) internal successors, (157), 145 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:42,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 157 transitions. [2021-12-16 22:47:42,870 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 157 transitions. Word has length 87 [2021-12-16 22:47:42,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:47:42,871 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 157 transitions. [2021-12-16 22:47:42,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.0625) internal successors, (147), 48 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:42,871 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 157 transitions. [2021-12-16 22:47:42,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-16 22:47:42,871 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:47:42,871 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:47:42,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-12-16 22:47:43,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-12-16 22:47:43,072 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:47:43,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:47:43,072 INFO L85 PathProgramCache]: Analyzing trace with hash -681456027, now seen corresponding path program 27 times [2021-12-16 22:47:43,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:47:43,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973883125] [2021-12-16 22:47:43,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:43,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:47:43,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:43,423 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:43,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:47:43,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973883125] [2021-12-16 22:47:43,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973883125] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:47:43,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314943691] [2021-12-16 22:47:43,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:47:43,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:43,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:47:43,425 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:47:43,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-16 22:47:43,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-12-16 22:47:43,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:47:43,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-16 22:47:43,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:47:43,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:47:44,856 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-16 22:47:44,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2021-12-16 22:47:44,884 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 231 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:44,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:47:46,068 INFO L388 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 18 treesize of output 16 [2021-12-16 22:47:46,070 INFO L388 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 34 treesize of output 28 [2021-12-16 22:47:46,116 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 220 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:46,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314943691] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:47:46,116 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:47:46,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 30] total 72 [2021-12-16 22:47:46,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418913422] [2021-12-16 22:47:46,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:47:46,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-12-16 22:47:46,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:47:46,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-12-16 22:47:46,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=591, Invalid=4520, Unknown=1, NotChecked=0, Total=5112 [2021-12-16 22:47:46,118 INFO L87 Difference]: Start difference. First operand 146 states and 157 transitions. Second operand has 72 states, 72 states have (on average 3.0833333333333335) internal successors, (222), 72 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:47,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:47:47,246 INFO L93 Difference]: Finished difference Result 199 states and 210 transitions. [2021-12-16 22:47:47,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-16 22:47:47,246 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.0833333333333335) internal successors, (222), 72 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-12-16 22:47:47,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:47:47,247 INFO L225 Difference]: With dead ends: 199 [2021-12-16 22:47:47,247 INFO L226 Difference]: Without dead ends: 147 [2021-12-16 22:47:47,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2157 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1184, Invalid=10587, Unknown=1, NotChecked=0, Total=11772 [2021-12-16 22:47:47,248 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 62 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:47:47,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 527 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 601 Invalid, 0 Unknown, 135 Unchecked, 0.2s Time] [2021-12-16 22:47:47,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-12-16 22:47:47,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2021-12-16 22:47:47,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.0758620689655172) internal successors, (156), 145 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:47,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 156 transitions. [2021-12-16 22:47:47,262 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 156 transitions. Word has length 88 [2021-12-16 22:47:47,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:47:47,262 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 156 transitions. [2021-12-16 22:47:47,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.0833333333333335) internal successors, (222), 72 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:47,262 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 156 transitions. [2021-12-16 22:47:47,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-16 22:47:47,263 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:47:47,263 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:47:47,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-12-16 22:47:47,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:47,468 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:47:47,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:47:47,468 INFO L85 PathProgramCache]: Analyzing trace with hash -435336006, now seen corresponding path program 28 times [2021-12-16 22:47:47,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:47:47,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761067675] [2021-12-16 22:47:47,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:47,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:47:47,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:47,845 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:47,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:47:47,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761067675] [2021-12-16 22:47:47,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761067675] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:47:47,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905289144] [2021-12-16 22:47:47,845 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 22:47:47,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:47,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:47:47,846 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:47:47,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-16 22:47:47,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 22:47:47,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:47:47,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-16 22:47:47,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:47:48,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:47:48,086 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-16 22:47:48,086 INFO L388 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 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-16 22:47:48,510 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:48,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:47:48,705 INFO L388 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 16 treesize of output 14 [2021-12-16 22:47:48,707 INFO L388 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 28 treesize of output 24 [2021-12-16 22:47:48,814 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:48,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905289144] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:47:48,815 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:47:48,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 30] total 44 [2021-12-16 22:47:48,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625586425] [2021-12-16 22:47:48,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:47:48,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-16 22:47:48,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:47:48,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-16 22:47:48,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1753, Unknown=0, NotChecked=0, Total=1892 [2021-12-16 22:47:48,816 INFO L87 Difference]: Start difference. First operand 146 states and 156 transitions. Second operand has 44 states, 44 states have (on average 3.2954545454545454) internal successors, (145), 44 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:49,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:47:49,962 INFO L93 Difference]: Finished difference Result 225 states and 234 transitions. [2021-12-16 22:47:49,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-12-16 22:47:49,962 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.2954545454545454) internal successors, (145), 44 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-12-16 22:47:49,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:47:49,963 INFO L225 Difference]: With dead ends: 225 [2021-12-16 22:47:49,963 INFO L226 Difference]: Without dead ends: 223 [2021-12-16 22:47:49,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 159 SyntacticMatches, 9 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=375, Invalid=6431, Unknown=0, NotChecked=0, Total=6806 [2021-12-16 22:47:49,964 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 154 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 1887 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 2054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 1887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 22:47:49,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 953 Invalid, 2054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 1887 Invalid, 0 Unknown, 5 Unchecked, 0.6s Time] [2021-12-16 22:47:49,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-12-16 22:47:49,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 151. [2021-12-16 22:47:49,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.0733333333333333) internal successors, (161), 150 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:49,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 161 transitions. [2021-12-16 22:47:49,979 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 161 transitions. Word has length 91 [2021-12-16 22:47:49,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:47:49,979 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 161 transitions. [2021-12-16 22:47:49,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.2954545454545454) internal successors, (145), 44 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:49,979 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 161 transitions. [2021-12-16 22:47:49,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-16 22:47:49,980 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:47:49,980 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:47:49,996 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-12-16 22:47:50,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:50,180 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:47:50,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:47:50,181 INFO L85 PathProgramCache]: Analyzing trace with hash 217035333, now seen corresponding path program 29 times [2021-12-16 22:47:50,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:47:50,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414902295] [2021-12-16 22:47:50,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:50,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:47:50,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:50,578 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:50,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:47:50,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414902295] [2021-12-16 22:47:50,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414902295] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:47:50,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441876154] [2021-12-16 22:47:50,579 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 22:47:50,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:50,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:47:50,580 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:47:50,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-16 22:47:50,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-12-16 22:47:50,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:47:50,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-16 22:47:50,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:47:50,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:47:50,940 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-16 22:47:50,941 INFO L388 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-16 22:47:50,985 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-16 22:47:50,985 INFO L388 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-16 22:47:51,382 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 2 proven. 527 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:51,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:47:51,653 INFO L388 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 16 treesize of output 14 [2021-12-16 22:47:51,654 INFO L388 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 28 treesize of output 24 [2021-12-16 22:47:51,762 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 22:47:51,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441876154] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:47:51,762 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:47:51,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 31] total 45 [2021-12-16 22:47:51,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486244037] [2021-12-16 22:47:51,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:47:51,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-16 22:47:51,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:47:51,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-16 22:47:51,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1835, Unknown=0, NotChecked=0, Total=1980 [2021-12-16 22:47:51,764 INFO L87 Difference]: Start difference. First operand 151 states and 161 transitions. Second operand has 45 states, 45 states have (on average 3.3333333333333335) internal successors, (150), 45 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:52,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:47:52,903 INFO L93 Difference]: Finished difference Result 220 states and 229 transitions. [2021-12-16 22:47:52,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-16 22:47:52,904 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.3333333333333335) internal successors, (150), 45 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-12-16 22:47:52,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:47:52,904 INFO L225 Difference]: With dead ends: 220 [2021-12-16 22:47:52,904 INFO L226 Difference]: Without dead ends: 218 [2021-12-16 22:47:52,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 164 SyntacticMatches, 11 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1143 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=336, Invalid=5066, Unknown=0, NotChecked=0, Total=5402 [2021-12-16 22:47:52,905 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 103 mSDsluCounter, 1009 mSDsCounter, 0 mSdLazyCounter, 2401 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 2503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-16 22:47:52,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 1048 Invalid, 2503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2401 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-16 22:47:52,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-12-16 22:47:52,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 158. [2021-12-16 22:47:52,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.0764331210191083) internal successors, (169), 157 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:52,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 169 transitions. [2021-12-16 22:47:52,922 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 169 transitions. Word has length 94 [2021-12-16 22:47:52,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:47:52,922 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 169 transitions. [2021-12-16 22:47:52,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.3333333333333335) internal successors, (150), 45 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:52,923 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 169 transitions. [2021-12-16 22:47:52,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-16 22:47:52,923 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:47:52,923 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:47:52,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-12-16 22:47:53,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-16 22:47:53,135 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:47:53,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:47:53,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1504152880, now seen corresponding path program 30 times [2021-12-16 22:47:53,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:47:53,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694193782] [2021-12-16 22:47:53,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:53,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:47:53,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:53,671 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:53,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:47:53,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694193782] [2021-12-16 22:47:53,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694193782] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:47:53,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458376996] [2021-12-16 22:47:53,671 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 22:47:53,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:53,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:47:53,672 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:47:53,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-16 22:47:53,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-12-16 22:47:53,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:47:53,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-16 22:47:53,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:47:54,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:47:55,145 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-16 22:47:55,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2021-12-16 22:47:55,172 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 276 proven. 259 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:55,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:47:56,226 INFO L388 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 18 treesize of output 16 [2021-12-16 22:47:56,229 INFO L388 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 34 treesize of output 28 [2021-12-16 22:47:56,297 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 264 proven. 271 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:56,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458376996] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:47:56,297 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:47:56,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 32, 32] total 76 [2021-12-16 22:47:56,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899907687] [2021-12-16 22:47:56,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:47:56,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-12-16 22:47:56,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:47:56,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-12-16 22:47:56,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=796, Invalid=4904, Unknown=0, NotChecked=0, Total=5700 [2021-12-16 22:47:56,299 INFO L87 Difference]: Start difference. First operand 158 states and 169 transitions. Second operand has 76 states, 76 states have (on average 3.1578947368421053) internal successors, (240), 76 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:57,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:47:57,422 INFO L93 Difference]: Finished difference Result 214 states and 225 transitions. [2021-12-16 22:47:57,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-16 22:47:57,423 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.1578947368421053) internal successors, (240), 76 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-12-16 22:47:57,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:47:57,423 INFO L225 Difference]: With dead ends: 214 [2021-12-16 22:47:57,423 INFO L226 Difference]: Without dead ends: 158 [2021-12-16 22:47:57,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3461 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1649, Invalid=11691, Unknown=0, NotChecked=0, Total=13340 [2021-12-16 22:47:57,425 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 173 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:47:57,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 541 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 449 Invalid, 0 Unknown, 175 Unchecked, 0.1s Time] [2021-12-16 22:47:57,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-12-16 22:47:57,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-12-16 22:47:57,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.070063694267516) internal successors, (168), 157 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:57,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 168 transitions. [2021-12-16 22:47:57,450 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 168 transitions. Word has length 95 [2021-12-16 22:47:57,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:47:57,451 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 168 transitions. [2021-12-16 22:47:57,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.1578947368421053) internal successors, (240), 76 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:57,451 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 168 transitions. [2021-12-16 22:47:57,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-16 22:47:57,452 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:47:57,452 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:47:57,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-12-16 22:47:57,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-16 22:47:57,667 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:47:57,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:47:57,668 INFO L85 PathProgramCache]: Analyzing trace with hash -184577226, now seen corresponding path program 3 times [2021-12-16 22:47:57,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:47:57,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411739227] [2021-12-16 22:47:57,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:57,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:47:57,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:57,823 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 37 proven. 495 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-12-16 22:47:57,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:47:57,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411739227] [2021-12-16 22:47:57,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411739227] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:47:57,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216269902] [2021-12-16 22:47:57,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:47:57,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:57,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:47:57,824 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:47:57,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-16 22:47:57,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-16 22:47:57,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:47:57,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 22:47:57,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:47:58,041 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 37 proven. 18 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2021-12-16 22:47:58,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:47:58,217 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 37 proven. 18 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2021-12-16 22:47:58,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216269902] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:47:58,218 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:47:58,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 4, 4] total 27 [2021-12-16 22:47:58,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367091446] [2021-12-16 22:47:58,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:47:58,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-16 22:47:58,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:47:58,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-16 22:47:58,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2021-12-16 22:47:58,219 INFO L87 Difference]: Start difference. First operand 158 states and 168 transitions. Second operand has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 27 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:58,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:47:58,592 INFO L93 Difference]: Finished difference Result 224 states and 237 transitions. [2021-12-16 22:47:58,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-16 22:47:58,593 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 27 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-12-16 22:47:58,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:47:58,593 INFO L225 Difference]: With dead ends: 224 [2021-12-16 22:47:58,593 INFO L226 Difference]: Without dead ends: 168 [2021-12-16 22:47:58,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=857, Invalid=1495, Unknown=0, NotChecked=0, Total=2352 [2021-12-16 22:47:58,594 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 602 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:47:58,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 70 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:47:58,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-12-16 22:47:58,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 99. [2021-12-16 22:47:58,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 98 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:58,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2021-12-16 22:47:58,606 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 97 [2021-12-16 22:47:58,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:47:58,606 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2021-12-16 22:47:58,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 27 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:58,607 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2021-12-16 22:47:58,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-16 22:47:58,607 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:47:58,607 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:47:58,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-12-16 22:47:58,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-16 22:47:58,823 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:47:58,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:47:58,823 INFO L85 PathProgramCache]: Analyzing trace with hash -696896197, now seen corresponding path program 31 times [2021-12-16 22:47:58,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:47:58,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909950635] [2021-12-16 22:47:58,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:58,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:47:58,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:59,343 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 0 proven. 575 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:59,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:47:59,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909950635] [2021-12-16 22:47:59,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909950635] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:47:59,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319292415] [2021-12-16 22:47:59,344 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 22:47:59,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:59,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:47:59,345 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:47:59,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-16 22:47:59,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:59,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-16 22:47:59,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:47:59,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:47:59,785 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-16 22:47:59,785 INFO L388 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-16 22:48:00,281 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 0 proven. 575 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:48:00,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:48:02,798 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_1069| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_1069| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_1438 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_1069| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1438) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 48)) 0)))) is different from false [2021-12-16 22:48:02,806 INFO L388 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 23 treesize of output 21 [2021-12-16 22:48:02,808 INFO L388 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 178 treesize of output 170 [2021-12-16 22:48:02,908 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 0 proven. 562 refuted. 0 times theorem prover too weak. 0 trivial. 13 not checked. [2021-12-16 22:48:02,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319292415] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:48:02,909 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:48:02,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 32] total 76 [2021-12-16 22:48:02,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684403932] [2021-12-16 22:48:02,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:48:02,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-12-16 22:48:02,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:48:02,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-12-16 22:48:02,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=5228, Unknown=1, NotChecked=146, Total=5700 [2021-12-16 22:48:02,910 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 76 states, 76 states have (on average 3.25) internal successors, (247), 76 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:48:05,758 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_1069| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_1069| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_1438 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_1069| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1438) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 48)) 0)))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)) 0) (= 48 (+ (* 4 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~a~0#1.offset|))) is different from false [2021-12-16 22:48:06,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:48:06,654 INFO L93 Difference]: Finished difference Result 108 states and 109 transitions. [2021-12-16 22:48:06,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-16 22:48:06,654 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.25) internal successors, (247), 76 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-12-16 22:48:06,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:48:06,655 INFO L225 Difference]: With dead ends: 108 [2021-12-16 22:48:06,655 INFO L226 Difference]: Without dead ends: 106 [2021-12-16 22:48:06,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 148 SyntacticMatches, 4 SemanticMatches, 105 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3372 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=604, Invalid=10322, Unknown=2, NotChecked=414, Total=11342 [2021-12-16 22:48:06,656 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 92 mSDsluCounter, 1344 mSDsCounter, 0 mSdLazyCounter, 3625 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 1377 SdHoareTripleChecker+Invalid, 3887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 3625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:48:06,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 1377 Invalid, 3887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 3625 Invalid, 0 Unknown, 149 Unchecked, 1.1s Time] [2021-12-16 22:48:06,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-16 22:48:06,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2021-12-16 22:48:06,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 102 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:48:06,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2021-12-16 22:48:06,674 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 98 [2021-12-16 22:48:06,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:48:06,674 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2021-12-16 22:48:06,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.25) internal successors, (247), 76 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:48:06,674 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2021-12-16 22:48:06,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-16 22:48:06,675 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:48:06,675 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:48:06,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-12-16 22:48:06,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:48:06,887 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:48:06,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:48:06,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1569305295, now seen corresponding path program 32 times [2021-12-16 22:48:06,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:48:06,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120402052] [2021-12-16 22:48:06,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:48:06,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:48:06,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:07,343 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:48:07,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:48:07,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120402052] [2021-12-16 22:48:07,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120402052] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:48:07,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203561239] [2021-12-16 22:48:07,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:48:07,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:48:07,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:48:07,344 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:48:07,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-16 22:48:07,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:48:07,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:48:07,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-16 22:48:07,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:48:07,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:48:08,097 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:48:08,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:48:08,267 INFO L388 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 16 treesize of output 14 [2021-12-16 22:48:08,268 INFO L388 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 28 treesize of output 24 [2021-12-16 22:48:08,393 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:48:08,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203561239] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:48:08,394 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:48:08,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 47 [2021-12-16 22:48:08,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804823514] [2021-12-16 22:48:08,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:48:08,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-16 22:48:08,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:48:08,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-16 22:48:08,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2028, Unknown=0, NotChecked=0, Total=2162 [2021-12-16 22:48:08,395 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 47 states, 47 states have (on average 3.425531914893617) internal successors, (161), 47 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:48:09,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:48:09,647 INFO L93 Difference]: Finished difference Result 114 states and 115 transitions. [2021-12-16 22:48:09,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-16 22:48:09,647 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.425531914893617) internal successors, (161), 47 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-12-16 22:48:09,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:48:09,648 INFO L225 Difference]: With dead ends: 114 [2021-12-16 22:48:09,648 INFO L226 Difference]: Without dead ends: 112 [2021-12-16 22:48:09,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 181 SyntacticMatches, 9 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=326, Invalid=5680, Unknown=0, NotChecked=0, Total=6006 [2021-12-16 22:48:09,649 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 87 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 2732 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 969 SdHoareTripleChecker+Invalid, 2834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-16 22:48:09,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 969 Invalid, 2834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2732 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-16 22:48:09,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-16 22:48:09,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 107. [2021-12-16 22:48:09,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 106 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:48:09,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2021-12-16 22:48:09,662 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 102 [2021-12-16 22:48:09,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:48:09,662 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2021-12-16 22:48:09,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.425531914893617) internal successors, (161), 47 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:48:09,663 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2021-12-16 22:48:09,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-16 22:48:09,663 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:48:09,663 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:48:09,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-12-16 22:48:09,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-16 22:48:09,875 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:48:09,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:48:09,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1071810009, now seen corresponding path program 33 times [2021-12-16 22:48:09,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:48:09,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277385394] [2021-12-16 22:48:09,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:48:09,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:48:09,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:10,170 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 339 proven. 340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:48:10,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:48:10,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277385394] [2021-12-16 22:48:10,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277385394] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:48:10,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807506289] [2021-12-16 22:48:10,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:48:10,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:48:10,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:48:10,172 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:48:10,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-16 22:48:10,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-12-16 22:48:10,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:48:10,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-16 22:48:10,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:48:11,074 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 392 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:48:11,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:48:11,225 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 392 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:48:11,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807506289] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:48:11,225 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:48:11,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2021-12-16 22:48:11,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780339998] [2021-12-16 22:48:11,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:48:11,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-16 22:48:11,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:48:11,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-16 22:48:11,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2021-12-16 22:48:11,227 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand has 50 states, 50 states have (on average 3.46) internal successors, (173), 50 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:48:11,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:48:11,495 INFO L93 Difference]: Finished difference Result 184 states and 186 transitions. [2021-12-16 22:48:11,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-16 22:48:11,496 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.46) internal successors, (173), 50 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-12-16 22:48:11,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:48:11,496 INFO L225 Difference]: With dead ends: 184 [2021-12-16 22:48:11,496 INFO L226 Difference]: Without dead ends: 120 [2021-12-16 22:48:11,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=986, Invalid=3174, Unknown=0, NotChecked=0, Total=4160 [2021-12-16 22:48:11,497 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 259 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:48:11,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 201 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:48:11,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-16 22:48:11,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 110. [2021-12-16 22:48:11,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.018348623853211) internal successors, (111), 109 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:48:11,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2021-12-16 22:48:11,510 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 106 [2021-12-16 22:48:11,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:48:11,510 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2021-12-16 22:48:11,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.46) internal successors, (173), 50 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:48:11,510 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2021-12-16 22:48:11,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-16 22:48:11,511 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:48:11,511 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:48:11,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-12-16 22:48:11,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-16 22:48:11,725 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:48:11,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:48:11,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1078465220, now seen corresponding path program 34 times [2021-12-16 22:48:11,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:48:11,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399685651] [2021-12-16 22:48:11,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:48:11,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:48:11,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:12,212 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:48:12,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:48:12,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399685651] [2021-12-16 22:48:12,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399685651] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:48:12,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878105082] [2021-12-16 22:48:12,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 22:48:12,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:48:12,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:48:12,214 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:48:12,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-16 22:48:12,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 22:48:12,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:48:12,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-16 22:48:12,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:48:12,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:48:13,022 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:48:13,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:48:13,193 INFO L388 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 16 treesize of output 14 [2021-12-16 22:48:13,194 INFO L388 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 28 treesize of output 24 [2021-12-16 22:48:13,321 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:48:13,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878105082] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:48:13,321 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:48:13,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 50 [2021-12-16 22:48:13,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894771067] [2021-12-16 22:48:13,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:48:13,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-16 22:48:13,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:48:13,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-16 22:48:13,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2307, Unknown=0, NotChecked=0, Total=2450 [2021-12-16 22:48:13,323 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand has 50 states, 50 states have (on average 3.44) internal successors, (172), 50 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:48:14,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:48:14,699 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2021-12-16 22:48:14,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-16 22:48:14,700 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.44) internal successors, (172), 50 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-12-16 22:48:14,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:48:14,700 INFO L225 Difference]: With dead ends: 121 [2021-12-16 22:48:14,700 INFO L226 Difference]: Without dead ends: 119 [2021-12-16 22:48:14,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 195 SyntacticMatches, 8 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=347, Invalid=6459, Unknown=0, NotChecked=0, Total=6806 [2021-12-16 22:48:14,701 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 86 mSDsluCounter, 1032 mSDsCounter, 0 mSdLazyCounter, 2938 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 1069 SdHoareTripleChecker+Invalid, 3044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-16 22:48:14,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 1069 Invalid, 3044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 2938 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-16 22:48:14,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-16 22:48:14,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 114. [2021-12-16 22:48:14,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.0176991150442478) internal successors, (115), 113 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:48:14,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2021-12-16 22:48:14,715 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 109 [2021-12-16 22:48:14,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:48:14,715 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2021-12-16 22:48:14,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.44) internal successors, (172), 50 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:48:14,716 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2021-12-16 22:48:14,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-16 22:48:14,716 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:48:14,716 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:48:14,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-12-16 22:48:14,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:48:14,934 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:48:14,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:48:14,934 INFO L85 PathProgramCache]: Analyzing trace with hash 606739634, now seen corresponding path program 35 times [2021-12-16 22:48:14,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:48:14,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684995728] [2021-12-16 22:48:14,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:48:14,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:48:14,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:15,251 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 393 proven. 387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:48:15,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:48:15,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684995728] [2021-12-16 22:48:15,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684995728] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:48:15,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756200251] [2021-12-16 22:48:15,252 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 22:48:15,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:48:15,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:48:15,253 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:48:15,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-16 22:48:15,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-12-16 22:48:15,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:48:15,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-16 22:48:15,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:48:16,056 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 450 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:48:16,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:48:16,218 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 450 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:48:16,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756200251] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:48:16,218 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:48:16,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 53 [2021-12-16 22:48:16,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109797377] [2021-12-16 22:48:16,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:48:16,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-16 22:48:16,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:48:16,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-16 22:48:16,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=2105, Unknown=0, NotChecked=0, Total=2756 [2021-12-16 22:48:16,219 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand has 53 states, 53 states have (on average 3.4716981132075473) internal successors, (184), 53 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:48:16,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:48:16,514 INFO L93 Difference]: Finished difference Result 195 states and 197 transitions. [2021-12-16 22:48:16,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-16 22:48:16,514 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.4716981132075473) internal successors, (184), 53 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-12-16 22:48:16,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:48:16,515 INFO L225 Difference]: With dead ends: 195 [2021-12-16 22:48:16,515 INFO L226 Difference]: Without dead ends: 127 [2021-12-16 22:48:16,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1107, Invalid=3585, Unknown=0, NotChecked=0, Total=4692 [2021-12-16 22:48:16,516 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 498 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:48:16,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 228 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:48:16,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-16 22:48:16,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 117. [2021-12-16 22:48:16,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:48:16,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2021-12-16 22:48:16,530 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 113 [2021-12-16 22:48:16,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:48:16,530 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2021-12-16 22:48:16,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.4716981132075473) internal successors, (184), 53 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:48:16,530 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2021-12-16 22:48:16,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-16 22:48:16,531 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:48:16,531 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:48:16,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-12-16 22:48:16,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-12-16 22:48:16,747 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:48:16,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:48:16,748 INFO L85 PathProgramCache]: Analyzing trace with hash -269420547, now seen corresponding path program 36 times [2021-12-16 22:48:16,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:48:16,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312184309] [2021-12-16 22:48:16,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:48:16,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:48:16,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:17,285 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 0 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:48:17,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:48:17,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312184309] [2021-12-16 22:48:17,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312184309] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:48:17,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816389877] [2021-12-16 22:48:17,287 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 22:48:17,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:48:17,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:48:17,288 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:48:17,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-12-16 22:48:18,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-12-16 22:48:18,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:48:18,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-16 22:48:18,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:48:18,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:48:20,311 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-16 22:48:20,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2021-12-16 22:48:20,346 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 435 proven. 391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:48:20,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:48:21,872 INFO L388 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 18 treesize of output 16 [2021-12-16 22:48:21,875 INFO L388 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 34 treesize of output 28 [2021-12-16 22:48:21,940 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 420 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:48:21,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816389877] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:48:21,940 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:48:21,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38, 38] total 92 [2021-12-16 22:48:21,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692301360] [2021-12-16 22:48:21,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:48:21,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-12-16 22:48:21,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:48:21,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-12-16 22:48:21,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=933, Invalid=7439, Unknown=0, NotChecked=0, Total=8372 [2021-12-16 22:48:21,942 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 92 states, 92 states have (on average 3.1956521739130435) internal successors, (294), 92 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:48:24,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:48:24,358 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2021-12-16 22:48:24,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-12-16 22:48:24,359 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 3.1956521739130435) internal successors, (294), 92 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-12-16 22:48:24,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:48:24,359 INFO L225 Difference]: With dead ends: 188 [2021-12-16 22:48:24,359 INFO L226 Difference]: Without dead ends: 120 [2021-12-16 22:48:24,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4520 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=2225, Invalid=21955, Unknown=0, NotChecked=0, Total=24180 [2021-12-16 22:48:24,361 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 123 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 901 SdHoareTripleChecker+Invalid, 1504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 447 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 22:48:24,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 901 Invalid, 1504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1025 Invalid, 0 Unknown, 447 Unchecked, 0.3s Time] [2021-12-16 22:48:24,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-16 22:48:24,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2021-12-16 22:48:24,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.0168067226890756) internal successors, (121), 119 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:48:24,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2021-12-16 22:48:24,386 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 116 [2021-12-16 22:48:24,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:48:24,386 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2021-12-16 22:48:24,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 3.1956521739130435) internal successors, (294), 92 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:48:24,386 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2021-12-16 22:48:24,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-16 22:48:24,387 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:48:24,387 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:48:24,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-12-16 22:48:24,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:48:24,591 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:48:24,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:48:24,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1441114926, now seen corresponding path program 37 times [2021-12-16 22:48:24,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:48:24,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627507252] [2021-12-16 22:48:24,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:48:24,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:48:24,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:25,155 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 0 proven. 875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:48:25,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:48:25,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627507252] [2021-12-16 22:48:25,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627507252] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:48:25,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214518860] [2021-12-16 22:48:25,156 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 22:48:25,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:48:25,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:48:25,157 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:48:25,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-12-16 22:48:25,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:25,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-16 22:48:25,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:48:25,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:48:25,475 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-16 22:48:25,476 INFO L388 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 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-16 22:48:26,125 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 0 proven. 875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:48:26,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:48:26,400 INFO L388 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 16 treesize of output 14 [2021-12-16 22:48:26,402 INFO L388 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 28 treesize of output 24 [2021-12-16 22:48:26,536 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 0 proven. 875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:48:26,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214518860] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:48:26,537 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:48:26,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 38] total 56 [2021-12-16 22:48:26,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607519646] [2021-12-16 22:48:26,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:48:26,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-16 22:48:26,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:48:26,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-16 22:48:26,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=2901, Unknown=0, NotChecked=0, Total=3080 [2021-12-16 22:48:26,538 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand has 56 states, 56 states have (on average 3.375) internal successors, (189), 56 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:48:28,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:48:28,450 INFO L93 Difference]: Finished difference Result 205 states and 207 transitions. [2021-12-16 22:48:28,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-12-16 22:48:28,450 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.375) internal successors, (189), 56 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-12-16 22:48:28,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:48:28,451 INFO L225 Difference]: With dead ends: 205 [2021-12-16 22:48:28,451 INFO L226 Difference]: Without dead ends: 203 [2021-12-16 22:48:28,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 212 SyntacticMatches, 8 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2544 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=483, Invalid=10859, Unknown=0, NotChecked=0, Total=11342 [2021-12-16 22:48:28,452 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 146 mSDsluCounter, 1486 mSDsCounter, 0 mSdLazyCounter, 3546 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 1528 SdHoareTripleChecker+Invalid, 3736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 3546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:48:28,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 1528 Invalid, 3736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 3546 Invalid, 0 Unknown, 9 Unchecked, 1.1s Time] [2021-12-16 22:48:28,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-12-16 22:48:28,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 128. [2021-12-16 22:48:28,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.0236220472440944) internal successors, (130), 127 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:48:28,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2021-12-16 22:48:28,478 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 119 [2021-12-16 22:48:28,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:48:28,478 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2021-12-16 22:48:28,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.375) internal successors, (189), 56 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:48:28,478 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2021-12-16 22:48:28,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-16 22:48:28,479 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:48:28,479 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:48:28,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-12-16 22:48:28,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:48:28,696 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:48:28,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:48:28,696 INFO L85 PathProgramCache]: Analyzing trace with hash 2105822173, now seen corresponding path program 38 times [2021-12-16 22:48:28,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:48:28,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951133627] [2021-12-16 22:48:28,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:48:28,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:48:28,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:29,298 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 0 proven. 927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:48:29,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:48:29,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951133627] [2021-12-16 22:48:29,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951133627] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:48:29,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624916193] [2021-12-16 22:48:29,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:48:29,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:48:29,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:48:29,300 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:48:29,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-12-16 22:48:29,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:48:29,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:48:29,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 81 conjunts are in the unsatisfiable core [2021-12-16 22:48:29,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:48:29,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:48:29,593 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-16 22:48:29,593 INFO L388 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-16 22:48:29,689 INFO L354 Elim1Store]: treesize reduction 80, result has 20.8 percent of original size [2021-12-16 22:48:29,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 38 [2021-12-16 22:48:30,865 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 2 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:48:30,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:48:31,540 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_1496| Int)) (or (and (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_1496| 4)) 0) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 60)) 0) (< 14 |v_ULTIMATE.start_main_~i~0#1_1496|)) (< |v_ULTIMATE.start_main_~i~0#1_1496| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2021-12-16 22:48:31,545 INFO L388 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 27 treesize of output 25 [2021-12-16 22:48:31,547 INFO L388 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 53 treesize of output 49 [2021-12-16 22:48:31,692 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 0 proven. 910 refuted. 0 times theorem prover too weak. 0 trivial. 17 not checked. [2021-12-16 22:48:31,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624916193] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:48:31,692 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:48:31,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 40, 40] total 63 [2021-12-16 22:48:31,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484798625] [2021-12-16 22:48:31,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:48:31,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-16 22:48:31,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:48:31,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-16 22:48:31,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=3547, Unknown=1, NotChecked=120, Total=3906 [2021-12-16 22:48:31,693 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand has 63 states, 63 states have (on average 3.2063492063492065) internal successors, (202), 63 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:48:32,784 WARN L838 $PredicateComparison]: unable to prove that (and (<= 15 |c_ULTIMATE.start_main_~i~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_1496| Int)) (or (and (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_1496| 4)) 0) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 60)) 0) (< 14 |v_ULTIMATE.start_main_~i~0#1_1496|)) (< |v_ULTIMATE.start_main_~i~0#1_1496| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (<= |c_ULTIMATE.start_main_~i~0#1| 15) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)) 0)) is different from false [2021-12-16 22:48:32,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:48:32,875 INFO L93 Difference]: Finished difference Result 195 states and 197 transitions. [2021-12-16 22:48:32,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-16 22:48:32,876 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.2063492063492065) internal successors, (202), 63 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-12-16 22:48:32,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:48:32,876 INFO L225 Difference]: With dead ends: 195 [2021-12-16 22:48:32,876 INFO L226 Difference]: Without dead ends: 193 [2021-12-16 22:48:32,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 213 SyntacticMatches, 8 SemanticMatches, 77 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=300, Invalid=5558, Unknown=2, NotChecked=302, Total=6162 [2021-12-16 22:48:32,877 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 99 mSDsluCounter, 1259 mSDsCounter, 0 mSdLazyCounter, 1862 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1298 SdHoareTripleChecker+Invalid, 2107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 224 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 22:48:32,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 1298 Invalid, 2107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1862 Invalid, 0 Unknown, 224 Unchecked, 0.5s Time] [2021-12-16 22:48:32,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-12-16 22:48:32,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 124. [2021-12-16 22:48:32,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.016260162601626) internal successors, (125), 123 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:48:32,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2021-12-16 22:48:32,894 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 122 [2021-12-16 22:48:32,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:48:32,894 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2021-12-16 22:48:32,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.2063492063492065) internal successors, (202), 63 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:48:32,895 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2021-12-16 22:48:32,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-16 22:48:32,895 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:48:32,895 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:48:32,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-12-16 22:48:33,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-12-16 22:48:33,097 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:48:33,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:48:33,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1052587704, now seen corresponding path program 39 times [2021-12-16 22:48:33,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:48:33,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153042032] [2021-12-16 22:48:33,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:48:33,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:48:33,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:33,677 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 0 proven. 937 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:48:33,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:48:33,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153042032] [2021-12-16 22:48:33,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153042032] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:48:33,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168155001] [2021-12-16 22:48:33,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:48:33,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:48:33,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:48:33,678 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:48:33,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-12-16 22:48:34,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-12-16 22:48:34,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:48:34,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-16 22:48:34,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:48:35,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:48:36,856 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-16 22:48:36,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2021-12-16 22:48:36,893 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 496 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:48:36,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:48:38,611 INFO L388 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 18 treesize of output 16 [2021-12-16 22:48:38,613 INFO L388 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 34 treesize of output 28 [2021-12-16 22:48:38,679 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 480 proven. 457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:48:38,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168155001] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:48:38,680 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:48:38,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 40, 40] total 97 [2021-12-16 22:48:38,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270105050] [2021-12-16 22:48:38,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:48:38,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-12-16 22:48:38,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:48:38,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-12-16 22:48:38,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1031, Invalid=8281, Unknown=0, NotChecked=0, Total=9312 [2021-12-16 22:48:38,681 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand has 97 states, 97 states have (on average 3.216494845360825) internal successors, (312), 97 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:48:41,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:48:41,406 INFO L93 Difference]: Finished difference Result 199 states and 201 transitions. [2021-12-16 22:48:41,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-12-16 22:48:41,406 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.216494845360825) internal successors, (312), 97 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-12-16 22:48:41,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:48:41,407 INFO L225 Difference]: With dead ends: 199 [2021-12-16 22:48:41,407 INFO L226 Difference]: Without dead ends: 127 [2021-12-16 22:48:41,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 206 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5117 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=2496, Invalid=24894, Unknown=0, NotChecked=0, Total=27390 [2021-12-16 22:48:41,408 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 97 mSDsluCounter, 971 mSDsCounter, 0 mSdLazyCounter, 1154 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 1912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 715 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 22:48:41,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 1012 Invalid, 1912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1154 Invalid, 0 Unknown, 715 Unchecked, 0.3s Time] [2021-12-16 22:48:41,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-16 22:48:41,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-12-16 22:48:41,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.0158730158730158) internal successors, (128), 126 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:48:41,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2021-12-16 22:48:41,426 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 123 [2021-12-16 22:48:41,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:48:41,426 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2021-12-16 22:48:41,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.216494845360825) internal successors, (312), 97 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:48:41,426 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2021-12-16 22:48:41,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-16 22:48:41,426 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:48:41,427 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:48:41,432 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-12-16 22:48:41,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-12-16 22:48:41,632 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:48:41,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:48:41,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1366573779, now seen corresponding path program 40 times [2021-12-16 22:48:41,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:48:41,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606840461] [2021-12-16 22:48:41,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:48:41,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:48:41,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:42,277 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 0 proven. 989 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:48:42,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:48:42,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606840461] [2021-12-16 22:48:42,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606840461] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:48:42,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692668739] [2021-12-16 22:48:42,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 22:48:42,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:48:42,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:48:42,278 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:48:42,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-12-16 22:48:42,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 22:48:42,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:48:42,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 80 conjunts are in the unsatisfiable core [2021-12-16 22:48:42,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:48:42,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:48:42,623 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-16 22:48:42,623 INFO L388 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 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-16 22:48:43,343 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 0 proven. 989 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:48:43,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:48:43,607 INFO L388 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 16 treesize of output 14 [2021-12-16 22:48:43,608 INFO L388 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 28 treesize of output 24 [2021-12-16 22:48:43,754 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 0 proven. 989 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:48:43,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692668739] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:48:43,754 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:48:43,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 40] total 59 [2021-12-16 22:48:43,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875783394] [2021-12-16 22:48:43,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:48:43,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-16 22:48:43,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:48:43,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-16 22:48:43,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=3233, Unknown=0, NotChecked=0, Total=3422 [2021-12-16 22:48:43,755 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand has 59 states, 59 states have (on average 3.389830508474576) internal successors, (200), 59 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:48:45,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:48:45,672 INFO L93 Difference]: Finished difference Result 213 states and 215 transitions. [2021-12-16 22:48:45,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-12-16 22:48:45,672 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.389830508474576) internal successors, (200), 59 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2021-12-16 22:48:45,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:48:45,673 INFO L225 Difference]: With dead ends: 213 [2021-12-16 22:48:45,673 INFO L226 Difference]: Without dead ends: 211 [2021-12-16 22:48:45,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 225 SyntacticMatches, 10 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2416 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=501, Invalid=10629, Unknown=0, NotChecked=0, Total=11130 [2021-12-16 22:48:45,674 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 125 mSDsluCounter, 1539 mSDsCounter, 0 mSdLazyCounter, 3676 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 1581 SdHoareTripleChecker+Invalid, 3940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 3676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:48:45,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 1581 Invalid, 3940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 3676 Invalid, 0 Unknown, 113 Unchecked, 1.1s Time] [2021-12-16 22:48:45,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-12-16 22:48:45,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 135. [2021-12-16 22:48:45,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.0223880597014925) internal successors, (137), 134 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:48:45,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2021-12-16 22:48:45,696 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 126 [2021-12-16 22:48:45,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:48:45,697 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2021-12-16 22:48:45,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.389830508474576) internal successors, (200), 59 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:48:45,697 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2021-12-16 22:48:45,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-16 22:48:45,697 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:48:45,697 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:48:45,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-12-16 22:48:45,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-12-16 22:48:45,898 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:48:45,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:48:45,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1055086952, now seen corresponding path program 41 times [2021-12-16 22:48:45,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:48:45,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521744027] [2021-12-16 22:48:45,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:48:45,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:48:45,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:46,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 0 proven. 1044 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:48:46,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:48:46,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521744027] [2021-12-16 22:48:46,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521744027] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:48:46,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758164209] [2021-12-16 22:48:46,543 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 22:48:46,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:48:46,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:48:46,544 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:48:46,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-12-16 22:48:46,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-12-16 22:48:46,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:48:46,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 83 conjunts are in the unsatisfiable core [2021-12-16 22:48:46,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:48:47,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:48:47,144 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-16 22:48:47,144 INFO L388 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-16 22:48:47,187 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-16 22:48:47,187 INFO L388 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-16 22:48:47,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 2 proven. 1042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:48:47,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:48:48,208 INFO L388 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 16 treesize of output 14 [2021-12-16 22:48:48,209 INFO L388 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 28 treesize of output 24 [2021-12-16 22:48:48,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 0 proven. 1043 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 22:48:48,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758164209] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:48:48,366 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:48:48,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 41] total 60 [2021-12-16 22:48:48,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779543573] [2021-12-16 22:48:48,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:48:48,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-16 22:48:48,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:48:48,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-16 22:48:48,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=3345, Unknown=0, NotChecked=0, Total=3540 [2021-12-16 22:48:48,368 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand has 60 states, 60 states have (on average 3.4166666666666665) internal successors, (205), 60 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:48:50,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:48:50,250 INFO L93 Difference]: Finished difference Result 211 states and 213 transitions. [2021-12-16 22:48:50,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-12-16 22:48:50,250 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.4166666666666665) internal successors, (205), 60 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2021-12-16 22:48:50,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:48:50,251 INFO L225 Difference]: With dead ends: 211 [2021-12-16 22:48:50,251 INFO L226 Difference]: Without dead ends: 209 [2021-12-16 22:48:50,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 229 SyntacticMatches, 11 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1978 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=446, Invalid=9256, Unknown=0, NotChecked=0, Total=9702 [2021-12-16 22:48:50,252 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 143 mSDsluCounter, 1712 mSDsCounter, 0 mSdLazyCounter, 4065 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 1757 SdHoareTripleChecker+Invalid, 4230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 4065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:48:50,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 1757 Invalid, 4230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 4065 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-16 22:48:50,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-12-16 22:48:50,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 131. [2021-12-16 22:48:50,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.0153846153846153) internal successors, (132), 130 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:48:50,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2021-12-16 22:48:50,272 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 129 [2021-12-16 22:48:50,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:48:50,273 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2021-12-16 22:48:50,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.4166666666666665) internal successors, (205), 60 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:48:50,273 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2021-12-16 22:48:50,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-16 22:48:50,273 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:48:50,274 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:48:50,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-12-16 22:48:50,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:48:50,483 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:48:50,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:48:50,484 INFO L85 PathProgramCache]: Analyzing trace with hash 772001481, now seen corresponding path program 42 times [2021-12-16 22:48:50,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:48:50,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521307274] [2021-12-16 22:48:50,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:48:50,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:48:50,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:51,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 0 proven. 1055 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:48:51,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:48:51,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521307274] [2021-12-16 22:48:51,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521307274] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:48:51,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815762137] [2021-12-16 22:48:51,122 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 22:48:51,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:48:51,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:48:51,123 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:48:51,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-12-16 22:48:52,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-12-16 22:48:52,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:48:52,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-16 22:48:52,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:48:52,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:48:54,512 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-16 22:48:54,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2021-12-16 22:48:54,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 561 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:48:54,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:48:56,419 INFO L388 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 18 treesize of output 16 [2021-12-16 22:48:56,421 INFO L388 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 34 treesize of output 28 [2021-12-16 22:48:56,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 544 proven. 511 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:48:56,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815762137] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:48:56,492 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:48:56,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42, 42] total 102 [2021-12-16 22:48:56,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190972965] [2021-12-16 22:48:56,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:48:56,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2021-12-16 22:48:56,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:48:56,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-12-16 22:48:56,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1134, Invalid=9168, Unknown=0, NotChecked=0, Total=10302 [2021-12-16 22:48:56,494 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand has 102 states, 102 states have (on average 3.235294117647059) internal successors, (330), 102 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:48:59,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:48:59,565 INFO L93 Difference]: Finished difference Result 210 states and 212 transitions. [2021-12-16 22:48:59,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-12-16 22:48:59,565 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 3.235294117647059) internal successors, (330), 102 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-12-16 22:48:59,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:48:59,566 INFO L225 Difference]: With dead ends: 210 [2021-12-16 22:48:59,566 INFO L226 Difference]: Without dead ends: 134 [2021-12-16 22:48:59,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 218 SyntacticMatches, 1 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5676 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=2739, Invalid=27711, Unknown=0, NotChecked=0, Total=30450 [2021-12-16 22:48:59,567 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 69 mSDsluCounter, 1290 mSDsCounter, 0 mSdLazyCounter, 1286 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 1332 SdHoareTripleChecker+Invalid, 1827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 499 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 22:48:59,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 1332 Invalid, 1827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1286 Invalid, 0 Unknown, 499 Unchecked, 0.4s Time] [2021-12-16 22:48:59,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-12-16 22:48:59,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2021-12-16 22:48:59,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 133 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:48:59,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2021-12-16 22:48:59,587 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 130 [2021-12-16 22:48:59,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:48:59,588 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2021-12-16 22:48:59,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 3.235294117647059) internal successors, (330), 102 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:48:59,588 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2021-12-16 22:48:59,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-16 22:48:59,588 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:48:59,588 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:48:59,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-12-16 22:48:59,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-12-16 22:48:59,789 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:48:59,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:48:59,789 INFO L85 PathProgramCache]: Analyzing trace with hash 170627806, now seen corresponding path program 43 times [2021-12-16 22:48:59,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:48:59,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837055851] [2021-12-16 22:48:59,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:48:59,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:48:59,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:00,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:49:00,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:49:00,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837055851] [2021-12-16 22:49:00,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837055851] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:49:00,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473931273] [2021-12-16 22:49:00,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 22:49:00,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:49:00,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:49:00,473 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:49:00,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-12-16 22:49:00,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:00,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 84 conjunts are in the unsatisfiable core [2021-12-16 22:49:00,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:49:00,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:49:00,821 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-16 22:49:00,822 INFO L388 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 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-16 22:49:01,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:49:01,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:49:01,931 INFO L388 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 16 treesize of output 14 [2021-12-16 22:49:01,933 INFO L388 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 28 treesize of output 24 [2021-12-16 22:49:02,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:49:02,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473931273] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:49:02,098 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:49:02,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 42] total 62 [2021-12-16 22:49:02,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022154734] [2021-12-16 22:49:02,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:49:02,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-12-16 22:49:02,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:49:02,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-12-16 22:49:02,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=3583, Unknown=0, NotChecked=0, Total=3782 [2021-12-16 22:49:02,100 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand has 62 states, 62 states have (on average 3.403225806451613) internal successors, (211), 62 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:49:04,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:49:04,457 INFO L93 Difference]: Finished difference Result 227 states and 229 transitions. [2021-12-16 22:49:04,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-12-16 22:49:04,458 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.403225806451613) internal successors, (211), 62 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-12-16 22:49:04,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:49:04,458 INFO L225 Difference]: With dead ends: 227 [2021-12-16 22:49:04,458 INFO L226 Difference]: Without dead ends: 225 [2021-12-16 22:49:04,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 237 SyntacticMatches, 9 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3154 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=537, Invalid=13505, Unknown=0, NotChecked=0, Total=14042 [2021-12-16 22:49:04,459 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 168 mSDsluCounter, 1847 mSDsCounter, 0 mSdLazyCounter, 4444 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 1893 SdHoareTripleChecker+Invalid, 4653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 4444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-16 22:49:04,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 1893 Invalid, 4653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 4444 Invalid, 0 Unknown, 5 Unchecked, 1.3s Time] [2021-12-16 22:49:04,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-12-16 22:49:04,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 142. [2021-12-16 22:49:04,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.0212765957446808) internal successors, (144), 141 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:49:04,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2021-12-16 22:49:04,482 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 133 [2021-12-16 22:49:04,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:49:04,482 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2021-12-16 22:49:04,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.403225806451613) internal successors, (211), 62 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:49:04,482 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2021-12-16 22:49:04,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-16 22:49:04,483 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:49:04,483 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:49:04,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-12-16 22:49:04,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-12-16 22:49:04,699 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:49:04,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:49:04,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1043932503, now seen corresponding path program 44 times [2021-12-16 22:49:04,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:49:04,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829891782] [2021-12-16 22:49:04,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:49:04,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:49:04,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:05,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1168 backedges. 0 proven. 1168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:49:05,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:49:05,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829891782] [2021-12-16 22:49:05,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829891782] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:49:05,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728121436] [2021-12-16 22:49:05,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:49:05,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:49:05,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:49:05,417 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:49:05,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-12-16 22:49:05,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:49:05,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:49:05,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 89 conjunts are in the unsatisfiable core [2021-12-16 22:49:05,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:49:05,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:49:05,764 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-16 22:49:05,764 INFO L388 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-16 22:49:05,868 INFO L354 Elim1Store]: treesize reduction 80, result has 20.8 percent of original size [2021-12-16 22:49:05,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 38 [2021-12-16 22:49:07,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1168 backedges. 2 proven. 1166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:49:07,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:49:07,969 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_1922| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_1922| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (and (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_1922| 4)) 0) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 68)) 0) (< 16 |v_ULTIMATE.start_main_~i~0#1_1922|)))) is different from false [2021-12-16 22:49:07,974 INFO L388 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 27 treesize of output 25 [2021-12-16 22:49:07,976 INFO L388 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 53 treesize of output 49 [2021-12-16 22:49:08,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1168 backedges. 0 proven. 1149 refuted. 0 times theorem prover too weak. 0 trivial. 19 not checked. [2021-12-16 22:49:08,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728121436] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:49:08,147 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:49:08,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 44, 44] total 69 [2021-12-16 22:49:08,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047411174] [2021-12-16 22:49:08,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:49:08,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-12-16 22:49:08,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:49:08,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-12-16 22:49:08,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=4299, Unknown=1, NotChecked=132, Total=4692 [2021-12-16 22:49:08,148 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand has 69 states, 69 states have (on average 3.246376811594203) internal successors, (224), 69 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:49:09,307 WARN L838 $PredicateComparison]: unable to prove that (and (<= 17 |c_ULTIMATE.start_main_~i~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_1922| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_1922| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (and (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_1922| 4)) 0) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 68)) 0) (< 16 |v_ULTIMATE.start_main_~i~0#1_1922|)))) (<= |c_ULTIMATE.start_main_~i~0#1| 17) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)) 0)) is different from false [2021-12-16 22:49:09,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:49:09,417 INFO L93 Difference]: Finished difference Result 217 states and 219 transitions. [2021-12-16 22:49:09,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-16 22:49:09,417 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.246376811594203) internal successors, (224), 69 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-12-16 22:49:09,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:49:09,418 INFO L225 Difference]: With dead ends: 217 [2021-12-16 22:49:09,418 INFO L226 Difference]: Without dead ends: 215 [2021-12-16 22:49:09,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 239 SyntacticMatches, 8 SemanticMatches, 85 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1230 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=330, Invalid=6816, Unknown=2, NotChecked=334, Total=7482 [2021-12-16 22:49:09,419 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 108 mSDsluCounter, 1572 mSDsCounter, 0 mSdLazyCounter, 1909 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 1615 SdHoareTripleChecker+Invalid, 2174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 241 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 22:49:09,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 1615 Invalid, 2174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1909 Invalid, 0 Unknown, 241 Unchecked, 0.6s Time] [2021-12-16 22:49:09,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-12-16 22:49:09,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 138. [2021-12-16 22:49:09,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0145985401459854) internal successors, (139), 137 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:49:09,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2021-12-16 22:49:09,442 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 136 [2021-12-16 22:49:09,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:49:09,442 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2021-12-16 22:49:09,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.246376811594203) internal successors, (224), 69 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:49:09,442 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2021-12-16 22:49:09,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-12-16 22:49:09,443 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:49:09,443 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:49:09,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-12-16 22:49:09,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:49:09,644 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:49:09,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:49:09,644 INFO L85 PathProgramCache]: Analyzing trace with hash 456008020, now seen corresponding path program 45 times [2021-12-16 22:49:09,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:49:09,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456857611] [2021-12-16 22:49:09,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:49:09,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:49:09,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:10,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 0 proven. 1180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:49:10,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:49:10,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456857611] [2021-12-16 22:49:10,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456857611] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:49:10,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650325621] [2021-12-16 22:49:10,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:49:10,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:49:10,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:49:10,375 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:49:10,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-12-16 22:49:11,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2021-12-16 22:49:11,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:49:11,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-16 22:49:11,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:49:12,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:49:14,114 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-16 22:49:14,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2021-12-16 22:49:14,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 630 proven. 550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:49:14,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:49:16,203 INFO L388 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 18 treesize of output 16 [2021-12-16 22:49:16,205 INFO L388 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 34 treesize of output 28 [2021-12-16 22:49:16,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 612 proven. 568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:49:16,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650325621] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:49:16,291 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:49:16,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 44, 44] total 107 [2021-12-16 22:49:16,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735261654] [2021-12-16 22:49:16,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:49:16,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-12-16 22:49:16,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:49:16,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-12-16 22:49:16,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1242, Invalid=10100, Unknown=0, NotChecked=0, Total=11342 [2021-12-16 22:49:16,295 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand has 107 states, 107 states have (on average 3.2523364485981308) internal successors, (348), 107 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:49:19,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:49:19,624 INFO L93 Difference]: Finished difference Result 221 states and 223 transitions. [2021-12-16 22:49:19,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-12-16 22:49:19,625 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 3.2523364485981308) internal successors, (348), 107 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2021-12-16 22:49:19,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:49:19,625 INFO L225 Difference]: With dead ends: 221 [2021-12-16 22:49:19,625 INFO L226 Difference]: Without dead ends: 141 [2021-12-16 22:49:19,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 230 SyntacticMatches, 1 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6185 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=2948, Invalid=30358, Unknown=0, NotChecked=0, Total=33306 [2021-12-16 22:49:19,627 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 74 mSDsluCounter, 1370 mSDsCounter, 0 mSdLazyCounter, 1444 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 1416 SdHoareTripleChecker+Invalid, 2241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 771 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 22:49:19,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 1416 Invalid, 2241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1444 Invalid, 0 Unknown, 771 Unchecked, 0.4s Time] [2021-12-16 22:49:19,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-12-16 22:49:19,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-12-16 22:49:19,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0142857142857142) internal successors, (142), 140 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:49:19,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2021-12-16 22:49:19,651 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 137 [2021-12-16 22:49:19,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:49:19,651 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2021-12-16 22:49:19,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 3.2523364485981308) internal successors, (348), 107 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:49:19,651 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2021-12-16 22:49:19,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-16 22:49:19,652 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:49:19,652 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:49:19,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-12-16 22:49:19,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-12-16 22:49:19,852 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:49:19,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:49:19,853 INFO L85 PathProgramCache]: Analyzing trace with hash -2131063905, now seen corresponding path program 46 times [2021-12-16 22:49:19,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:49:19,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798973415] [2021-12-16 22:49:19,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:49:19,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:49:19,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:20,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 0 proven. 1238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:49:20,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:49:20,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798973415] [2021-12-16 22:49:20,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798973415] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:49:20,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512271950] [2021-12-16 22:49:20,588 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 22:49:20,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:49:20,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:49:20,589 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:49:20,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-12-16 22:49:20,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 22:49:20,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:49:20,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-16 22:49:20,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:49:20,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:49:20,979 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-16 22:49:20,980 INFO L388 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 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-16 22:49:21,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 0 proven. 1238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:49:21,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:49:22,126 INFO L388 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 16 treesize of output 14 [2021-12-16 22:49:22,128 INFO L388 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 28 treesize of output 24 [2021-12-16 22:49:22,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 0 proven. 1238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:49:22,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512271950] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:49:22,296 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:49:22,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 44] total 65 [2021-12-16 22:49:22,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573271325] [2021-12-16 22:49:22,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:49:22,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-16 22:49:22,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:49:22,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-16 22:49:22,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=3951, Unknown=0, NotChecked=0, Total=4160 [2021-12-16 22:49:22,300 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand has 65 states, 65 states have (on average 3.4153846153846152) internal successors, (222), 65 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:49:24,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:49:24,818 INFO L93 Difference]: Finished difference Result 238 states and 240 transitions. [2021-12-16 22:49:24,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-12-16 22:49:24,818 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.4153846153846152) internal successors, (222), 65 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-12-16 22:49:24,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:49:24,819 INFO L225 Difference]: With dead ends: 238 [2021-12-16 22:49:24,819 INFO L226 Difference]: Without dead ends: 236 [2021-12-16 22:49:24,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 250 SyntacticMatches, 9 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3479 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=564, Invalid=14936, Unknown=0, NotChecked=0, Total=15500 [2021-12-16 22:49:24,820 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 212 mSDsluCounter, 1939 mSDsCounter, 0 mSdLazyCounter, 4570 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 1987 SdHoareTripleChecker+Invalid, 4823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 4570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-16 22:49:24,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 1987 Invalid, 4823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 4570 Invalid, 0 Unknown, 5 Unchecked, 1.4s Time] [2021-12-16 22:49:24,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-12-16 22:49:24,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 149. [2021-12-16 22:49:24,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0202702702702702) internal successors, (151), 148 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:49:24,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2021-12-16 22:49:24,846 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 140 [2021-12-16 22:49:24,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:49:24,846 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2021-12-16 22:49:24,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.4153846153846152) internal successors, (222), 65 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:49:24,847 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2021-12-16 22:49:24,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-16 22:49:24,847 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:49:24,847 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:49:24,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-12-16 22:49:25,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:49:25,048 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:49:25,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:49:25,048 INFO L85 PathProgramCache]: Analyzing trace with hash -402654860, now seen corresponding path program 47 times [2021-12-16 22:49:25,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:49:25,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053208880] [2021-12-16 22:49:25,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:49:25,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:49:25,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:25,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1299 backedges. 0 proven. 1299 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:49:25,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:49:25,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053208880] [2021-12-16 22:49:25,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053208880] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:49:25,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244871646] [2021-12-16 22:49:25,837 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 22:49:25,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:49:25,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:49:25,838 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:49:25,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-12-16 22:49:26,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-12-16 22:49:26,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:49:26,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 91 conjunts are in the unsatisfiable core [2021-12-16 22:49:26,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:49:26,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:49:26,482 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-16 22:49:26,482 INFO L388 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-16 22:49:26,527 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-16 22:49:26,528 INFO L388 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-16 22:49:27,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1299 backedges. 2 proven. 1297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:49:27,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:49:27,733 INFO L388 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 16 treesize of output 14 [2021-12-16 22:49:27,734 INFO L388 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 28 treesize of output 24 [2021-12-16 22:49:27,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1299 backedges. 0 proven. 1298 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 22:49:27,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244871646] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:49:27,905 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:49:27,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 45] total 66 [2021-12-16 22:49:27,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54353119] [2021-12-16 22:49:27,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:49:27,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-16 22:49:27,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:49:27,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-16 22:49:27,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=4075, Unknown=0, NotChecked=0, Total=4290 [2021-12-16 22:49:27,906 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand has 66 states, 66 states have (on average 3.4393939393939394) internal successors, (227), 66 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:49:30,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:49:30,318 INFO L93 Difference]: Finished difference Result 233 states and 235 transitions. [2021-12-16 22:49:30,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-12-16 22:49:30,318 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.4393939393939394) internal successors, (227), 66 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-12-16 22:49:30,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:49:30,319 INFO L225 Difference]: With dead ends: 233 [2021-12-16 22:49:30,319 INFO L226 Difference]: Without dead ends: 231 [2021-12-16 22:49:30,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 255 SyntacticMatches, 11 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2382 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=490, Invalid=11282, Unknown=0, NotChecked=0, Total=11772 [2021-12-16 22:49:30,320 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 118 mSDsluCounter, 2074 mSDsCounter, 0 mSdLazyCounter, 5328 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 2123 SdHoareTripleChecker+Invalid, 5477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 5328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-16 22:49:30,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 2123 Invalid, 5477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 5328 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-16 22:49:30,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-12-16 22:49:30,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 145. [2021-12-16 22:49:30,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0138888888888888) internal successors, (146), 144 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:49:30,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2021-12-16 22:49:30,347 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 143 [2021-12-16 22:49:30,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:49:30,347 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2021-12-16 22:49:30,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.4393939393939394) internal successors, (227), 66 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:49:30,348 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2021-12-16 22:49:30,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-16 22:49:30,348 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:49:30,348 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:49:30,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-12-16 22:49:30,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-12-16 22:49:30,555 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:49:30,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:49:30,556 INFO L85 PathProgramCache]: Analyzing trace with hash 744542613, now seen corresponding path program 48 times [2021-12-16 22:49:30,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:49:30,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438450485] [2021-12-16 22:49:30,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:49:30,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:49:30,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:31,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 1312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:49:31,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:49:31,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438450485] [2021-12-16 22:49:31,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438450485] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:49:31,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581776235] [2021-12-16 22:49:31,327 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 22:49:31,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:49:31,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:49:31,328 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:49:31,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-12-16 22:49:32,973 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-12-16 22:49:32,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:49:32,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-16 22:49:32,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:49:33,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:49:35,527 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-16 22:49:35,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2021-12-16 22:49:35,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 703 proven. 609 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:49:35,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:49:37,755 INFO L388 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 18 treesize of output 16 [2021-12-16 22:49:37,757 INFO L388 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 34 treesize of output 28 [2021-12-16 22:49:37,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 684 proven. 628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:49:37,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581776235] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:49:37,837 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:49:37,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 46, 46] total 112 [2021-12-16 22:49:37,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974981491] [2021-12-16 22:49:37,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:49:37,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2021-12-16 22:49:37,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:49:37,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2021-12-16 22:49:37,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1355, Invalid=11077, Unknown=0, NotChecked=0, Total=12432 [2021-12-16 22:49:37,839 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand has 112 states, 112 states have (on average 3.267857142857143) internal successors, (366), 112 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:49:40,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:49:40,657 INFO L93 Difference]: Finished difference Result 232 states and 234 transitions. [2021-12-16 22:49:40,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-12-16 22:49:40,657 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 3.267857142857143) internal successors, (366), 112 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2021-12-16 22:49:40,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:49:40,658 INFO L225 Difference]: With dead ends: 232 [2021-12-16 22:49:40,658 INFO L226 Difference]: Without dead ends: 148 [2021-12-16 22:49:40,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 258 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5241 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=2660, Invalid=27096, Unknown=0, NotChecked=0, Total=29756 [2021-12-16 22:49:40,660 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 128 mSDsluCounter, 1269 mSDsCounter, 0 mSdLazyCounter, 1411 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 1313 SdHoareTripleChecker+Invalid, 1607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 22:49:40,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 1313 Invalid, 1607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1411 Invalid, 0 Unknown, 151 Unchecked, 0.4s Time] [2021-12-16 22:49:40,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-12-16 22:49:40,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2021-12-16 22:49:40,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.0136054421768708) internal successors, (149), 147 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:49:40,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2021-12-16 22:49:40,692 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 144 [2021-12-16 22:49:40,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:49:40,692 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2021-12-16 22:49:40,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 3.267857142857143) internal successors, (366), 112 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:49:40,692 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2021-12-16 22:49:40,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-16 22:49:40,692 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:49:40,693 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:49:40,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-12-16 22:49:40,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-12-16 22:49:40,893 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:49:40,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:49:40,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1801368342, now seen corresponding path program 49 times [2021-12-16 22:49:40,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:49:40,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999975243] [2021-12-16 22:49:40,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:49:40,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:49:40,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:41,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 0 proven. 1373 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:49:41,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:49:41,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999975243] [2021-12-16 22:49:41,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999975243] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:49:41,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706606991] [2021-12-16 22:49:41,681 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 22:49:41,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:49:41,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:49:41,682 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:49:41,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-12-16 22:49:41,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:41,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 92 conjunts are in the unsatisfiable core [2021-12-16 22:49:41,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:49:42,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:49:42,078 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-16 22:49:42,078 INFO L388 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 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-16 22:49:43,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 0 proven. 1373 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:49:43,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:49:43,342 INFO L388 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 16 treesize of output 14 [2021-12-16 22:49:43,344 INFO L388 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 28 treesize of output 24 [2021-12-16 22:49:43,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 0 proven. 1373 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:49:43,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706606991] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:49:43,517 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:49:43,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 46] total 68 [2021-12-16 22:49:43,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582042934] [2021-12-16 22:49:43,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:49:43,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-12-16 22:49:43,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:49:43,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-12-16 22:49:43,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=4337, Unknown=0, NotChecked=0, Total=4556 [2021-12-16 22:49:43,519 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand has 68 states, 68 states have (on average 3.426470588235294) internal successors, (233), 68 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:49:46,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:49:46,240 INFO L93 Difference]: Finished difference Result 249 states and 251 transitions. [2021-12-16 22:49:46,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-12-16 22:49:46,241 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.426470588235294) internal successors, (233), 68 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2021-12-16 22:49:46,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:49:46,241 INFO L225 Difference]: With dead ends: 249 [2021-12-16 22:49:46,242 INFO L226 Difference]: Without dead ends: 247 [2021-12-16 22:49:46,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 262 SyntacticMatches, 10 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3821 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=591, Invalid=16439, Unknown=0, NotChecked=0, Total=17030 [2021-12-16 22:49:46,243 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 186 mSDsluCounter, 2220 mSDsCounter, 0 mSdLazyCounter, 5016 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 2270 SdHoareTripleChecker+Invalid, 5248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 5016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-16 22:49:46,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 2270 Invalid, 5248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 5016 Invalid, 0 Unknown, 5 Unchecked, 1.5s Time] [2021-12-16 22:49:46,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-12-16 22:49:46,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 156. [2021-12-16 22:49:46,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.0193548387096774) internal successors, (158), 155 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:49:46,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 158 transitions. [2021-12-16 22:49:46,273 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 158 transitions. Word has length 147 [2021-12-16 22:49:46,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:49:46,273 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 158 transitions. [2021-12-16 22:49:46,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.426470588235294) internal successors, (233), 68 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:49:46,274 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 158 transitions. [2021-12-16 22:49:46,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-12-16 22:49:46,274 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:49:46,274 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:49:46,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-12-16 22:49:46,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:49:46,491 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:49:46,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:49:46,492 INFO L85 PathProgramCache]: Analyzing trace with hash 2087818613, now seen corresponding path program 50 times [2021-12-16 22:49:46,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:49:46,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806544117] [2021-12-16 22:49:46,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:49:46,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:49:46,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:47,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1437 backedges. 0 proven. 1437 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:49:47,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:49:47,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806544117] [2021-12-16 22:49:47,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806544117] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:49:47,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173606182] [2021-12-16 22:49:47,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:49:47,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:49:47,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:49:47,339 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:49:47,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-12-16 22:49:47,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:49:47,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:49:47,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 97 conjunts are in the unsatisfiable core [2021-12-16 22:49:47,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:49:47,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:49:47,730 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-16 22:49:47,731 INFO L388 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-16 22:49:47,843 INFO L354 Elim1Store]: treesize reduction 80, result has 20.8 percent of original size [2021-12-16 22:49:47,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 38 [2021-12-16 22:49:49,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1437 backedges. 2 proven. 1435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:49:49,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:49:50,181 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_2396| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_2396| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (and (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_2396| 4)) 0) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 76)) 0) (< 18 |v_ULTIMATE.start_main_~i~0#1_2396|)))) is different from false [2021-12-16 22:49:50,186 INFO L388 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 27 treesize of output 25 [2021-12-16 22:49:50,188 INFO L388 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 53 treesize of output 49 [2021-12-16 22:49:50,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1437 backedges. 0 proven. 1416 refuted. 0 times theorem prover too weak. 0 trivial. 21 not checked. [2021-12-16 22:49:50,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173606182] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:49:50,365 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:49:50,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 48, 48] total 75 [2021-12-16 22:49:50,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878689529] [2021-12-16 22:49:50,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:49:50,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-12-16 22:49:50,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:49:50,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-12-16 22:49:50,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=5123, Unknown=1, NotChecked=144, Total=5550 [2021-12-16 22:49:50,366 INFO L87 Difference]: Start difference. First operand 156 states and 158 transitions. Second operand has 75 states, 75 states have (on average 3.28) internal successors, (246), 75 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:49:51,894 WARN L838 $PredicateComparison]: unable to prove that (and (<= 19 |c_ULTIMATE.start_main_~i~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_2396| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_2396| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (and (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_2396| 4)) 0) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 76)) 0) (< 18 |v_ULTIMATE.start_main_~i~0#1_2396|)))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)) 0) (<= |c_ULTIMATE.start_main_~i~0#1| 19)) is different from false [2021-12-16 22:49:52,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:49:52,035 INFO L93 Difference]: Finished difference Result 239 states and 241 transitions. [2021-12-16 22:49:52,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-16 22:49:52,036 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.28) internal successors, (246), 75 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-12-16 22:49:52,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:49:52,036 INFO L225 Difference]: With dead ends: 239 [2021-12-16 22:49:52,036 INFO L226 Difference]: Without dead ends: 237 [2021-12-16 22:49:52,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 265 SyntacticMatches, 8 SemanticMatches, 93 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1426 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=360, Invalid=8202, Unknown=2, NotChecked=366, Total=8930 [2021-12-16 22:49:52,037 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 124 mSDsluCounter, 1863 mSDsCounter, 0 mSdLazyCounter, 3008 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 1910 SdHoareTripleChecker+Invalid, 3352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 3008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 317 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-16 22:49:52,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 1910 Invalid, 3352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 3008 Invalid, 0 Unknown, 317 Unchecked, 0.9s Time] [2021-12-16 22:49:52,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-12-16 22:49:52,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 152. [2021-12-16 22:49:52,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.0132450331125828) internal successors, (153), 151 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:49:52,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2021-12-16 22:49:52,068 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 150 [2021-12-16 22:49:52,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:49:52,069 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2021-12-16 22:49:52,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.28) internal successors, (246), 75 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:49:52,069 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2021-12-16 22:49:52,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-16 22:49:52,069 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:49:52,070 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:49:52,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-12-16 22:49:52,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:49:52,279 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:49:52,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:49:52,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1595935392, now seen corresponding path program 51 times [2021-12-16 22:49:52,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:49:52,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399234044] [2021-12-16 22:49:52,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:49:52,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:49:52,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:53,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 0 proven. 1451 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:49:53,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:49:53,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399234044] [2021-12-16 22:49:53,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399234044] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:49:53,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534331463] [2021-12-16 22:49:53,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:49:53,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:49:53,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:49:53,091 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:49:53,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-12-16 22:49:55,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-12-16 22:49:55,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:49:55,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-16 22:49:55,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:49:55,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:49:57,823 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-16 22:49:57,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2021-12-16 22:49:57,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 780 proven. 671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:49:57,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:50:00,222 INFO L388 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 18 treesize of output 16 [2021-12-16 22:50:00,224 INFO L388 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 34 treesize of output 28 [2021-12-16 22:50:00,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 760 proven. 691 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:50:00,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534331463] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:50:00,306 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:50:00,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 48, 48] total 117 [2021-12-16 22:50:00,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991862534] [2021-12-16 22:50:00,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:50:00,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2021-12-16 22:50:00,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:50:00,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2021-12-16 22:50:00,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1473, Invalid=12099, Unknown=0, NotChecked=0, Total=13572 [2021-12-16 22:50:00,308 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand has 117 states, 117 states have (on average 3.282051282051282) internal successors, (384), 117 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:50:04,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:50:04,305 INFO L93 Difference]: Finished difference Result 243 states and 245 transitions. [2021-12-16 22:50:04,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-12-16 22:50:04,306 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 3.282051282051282) internal successors, (384), 117 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2021-12-16 22:50:04,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:50:04,306 INFO L225 Difference]: With dead ends: 243 [2021-12-16 22:50:04,306 INFO L226 Difference]: Without dead ends: 155 [2021-12-16 22:50:04,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7440 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=3485, Invalid=36715, Unknown=0, NotChecked=0, Total=40200 [2021-12-16 22:50:04,308 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 102 mSDsluCounter, 1540 mSDsCounter, 0 mSdLazyCounter, 1791 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 1590 SdHoareTripleChecker+Invalid, 2497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 653 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 22:50:04,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 1590 Invalid, 2497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1791 Invalid, 0 Unknown, 653 Unchecked, 0.5s Time] [2021-12-16 22:50:04,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-12-16 22:50:04,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2021-12-16 22:50:04,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.0129870129870129) internal successors, (156), 154 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:50:04,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2021-12-16 22:50:04,340 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 151 [2021-12-16 22:50:04,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:50:04,340 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2021-12-16 22:50:04,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 3.282051282051282) internal successors, (384), 117 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:50:04,341 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2021-12-16 22:50:04,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-12-16 22:50:04,341 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:50:04,341 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:50:04,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-12-16 22:50:04,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:50:04,555 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:50:04,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:50:04,556 INFO L85 PathProgramCache]: Analyzing trace with hash 519241835, now seen corresponding path program 52 times [2021-12-16 22:50:04,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:50:04,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417019942] [2021-12-16 22:50:04,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:50:04,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:50:04,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:50:05,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1515 backedges. 0 proven. 1515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:50:05,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:50:05,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417019942] [2021-12-16 22:50:05,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417019942] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:50:05,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360729789] [2021-12-16 22:50:05,400 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 22:50:05,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:50:05,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:50:05,401 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:50:05,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-12-16 22:50:05,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 22:50:05,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:50:05,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-16 22:50:05,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:50:05,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:50:05,829 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-16 22:50:05,829 INFO L388 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 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-16 22:50:06,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1515 backedges. 0 proven. 1515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:50:06,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:50:07,155 INFO L388 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 16 treesize of output 14 [2021-12-16 22:50:07,156 INFO L388 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 28 treesize of output 24 [2021-12-16 22:50:07,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1515 backedges. 0 proven. 1515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:50:07,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360729789] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:50:07,355 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:50:07,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 48] total 71 [2021-12-16 22:50:07,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36020323] [2021-12-16 22:50:07,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:50:07,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-12-16 22:50:07,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:50:07,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-12-16 22:50:07,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=4741, Unknown=0, NotChecked=0, Total=4970 [2021-12-16 22:50:07,356 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand has 71 states, 71 states have (on average 3.436619718309859) internal successors, (244), 71 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:50:10,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:50:10,395 INFO L93 Difference]: Finished difference Result 260 states and 262 transitions. [2021-12-16 22:50:10,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-12-16 22:50:10,395 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.436619718309859) internal successors, (244), 71 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2021-12-16 22:50:10,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:50:10,396 INFO L225 Difference]: With dead ends: 260 [2021-12-16 22:50:10,396 INFO L226 Difference]: Without dead ends: 258 [2021-12-16 22:50:10,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 275 SyntacticMatches, 10 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4178 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=618, Invalid=18014, Unknown=0, NotChecked=0, Total=18632 [2021-12-16 22:50:10,397 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 235 mSDsluCounter, 2398 mSDsCounter, 0 mSdLazyCounter, 5731 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 2450 SdHoareTripleChecker+Invalid, 6012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 5731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-16 22:50:10,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 2450 Invalid, 6012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 5731 Invalid, 0 Unknown, 5 Unchecked, 1.7s Time] [2021-12-16 22:50:10,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-12-16 22:50:10,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 163. [2021-12-16 22:50:10,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.0185185185185186) internal successors, (165), 162 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:50:10,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 165 transitions. [2021-12-16 22:50:10,431 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 165 transitions. Word has length 154 [2021-12-16 22:50:10,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:50:10,431 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 165 transitions. [2021-12-16 22:50:10,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.436619718309859) internal successors, (244), 71 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:50:10,431 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 165 transitions. [2021-12-16 22:50:10,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-16 22:50:10,432 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:50:10,432 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:50:10,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-12-16 22:50:10,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-12-16 22:50:10,633 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:50:10,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:50:10,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1996155520, now seen corresponding path program 53 times [2021-12-16 22:50:10,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:50:10,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449955302] [2021-12-16 22:50:10,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:50:10,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:50:10,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:50:11,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1582 backedges. 0 proven. 1582 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:50:11,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:50:11,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449955302] [2021-12-16 22:50:11,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449955302] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:50:11,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570854243] [2021-12-16 22:50:11,538 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 22:50:11,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:50:11,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:50:11,539 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:50:11,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-12-16 22:50:12,400 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-12-16 22:50:12,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:50:12,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 99 conjunts are in the unsatisfiable core [2021-12-16 22:50:12,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:50:12,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:50:12,621 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-16 22:50:12,622 INFO L388 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-16 22:50:12,671 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-16 22:50:12,671 INFO L388 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-16 22:50:13,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1582 backedges. 2 proven. 1580 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:50:13,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:50:14,069 INFO L388 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 16 treesize of output 14 [2021-12-16 22:50:14,071 INFO L388 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 28 treesize of output 24 [2021-12-16 22:50:14,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1582 backedges. 0 proven. 1581 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 22:50:14,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570854243] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:50:14,250 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:50:14,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 49] total 72 [2021-12-16 22:50:14,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862817227] [2021-12-16 22:50:14,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:50:14,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-12-16 22:50:14,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:50:14,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-12-16 22:50:14,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=4877, Unknown=0, NotChecked=0, Total=5112 [2021-12-16 22:50:14,251 INFO L87 Difference]: Start difference. First operand 163 states and 165 transitions. Second operand has 72 states, 72 states have (on average 3.4583333333333335) internal successors, (249), 72 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:50:16,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:50:16,989 INFO L93 Difference]: Finished difference Result 255 states and 257 transitions. [2021-12-16 22:50:16,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-12-16 22:50:16,989 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.4583333333333335) internal successors, (249), 72 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 157 [2021-12-16 22:50:16,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:50:16,990 INFO L225 Difference]: With dead ends: 255 [2021-12-16 22:50:16,990 INFO L226 Difference]: Without dead ends: 253 [2021-12-16 22:50:16,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 282 SyntacticMatches, 10 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2807 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=534, Invalid=13508, Unknown=0, NotChecked=0, Total=14042 [2021-12-16 22:50:16,991 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 133 mSDsluCounter, 2492 mSDsCounter, 0 mSdLazyCounter, 6010 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 2545 SdHoareTripleChecker+Invalid, 6176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 6010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-16 22:50:16,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 2545 Invalid, 6176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 6010 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-16 22:50:16,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-12-16 22:50:17,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 159. [2021-12-16 22:50:17,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.0126582278481013) internal successors, (160), 158 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:50:17,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2021-12-16 22:50:17,027 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 157 [2021-12-16 22:50:17,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:50:17,027 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2021-12-16 22:50:17,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.4583333333333335) internal successors, (249), 72 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:50:17,027 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2021-12-16 22:50:17,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-12-16 22:50:17,028 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:50:17,028 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:50:17,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-12-16 22:50:17,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-12-16 22:50:17,232 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:50:17,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:50:17,233 INFO L85 PathProgramCache]: Analyzing trace with hash 2084175969, now seen corresponding path program 54 times [2021-12-16 22:50:17,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:50:17,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191664284] [2021-12-16 22:50:17,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:50:17,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:50:17,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:50:18,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1597 backedges. 0 proven. 1597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:50:18,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:50:18,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191664284] [2021-12-16 22:50:18,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191664284] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:50:18,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60582642] [2021-12-16 22:50:18,092 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 22:50:18,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:50:18,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:50:18,093 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:50:18,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-12-16 22:50:21,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-12-16 22:50:21,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:50:21,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-16 22:50:21,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:50:22,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:50:24,215 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-16 22:50:24,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2021-12-16 22:50:24,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1597 backedges. 861 proven. 736 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:50:24,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:50:26,797 INFO L388 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 18 treesize of output 16 [2021-12-16 22:50:26,800 INFO L388 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 34 treesize of output 28 [2021-12-16 22:50:26,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1597 backedges. 840 proven. 757 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:50:26,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60582642] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:50:26,889 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:50:26,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 50, 50] total 122 [2021-12-16 22:50:26,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363687258] [2021-12-16 22:50:26,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:50:26,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2021-12-16 22:50:26,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:50:26,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2021-12-16 22:50:26,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=13166, Unknown=0, NotChecked=0, Total=14762 [2021-12-16 22:50:26,891 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand has 122 states, 122 states have (on average 3.2950819672131146) internal successors, (402), 122 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:50:31,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:50:31,332 INFO L93 Difference]: Finished difference Result 254 states and 256 transitions. [2021-12-16 22:50:31,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-12-16 22:50:31,333 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 3.2950819672131146) internal successors, (402), 122 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2021-12-16 22:50:31,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:50:31,333 INFO L225 Difference]: With dead ends: 254 [2021-12-16 22:50:31,333 INFO L226 Difference]: Without dead ends: 162 [2021-12-16 22:50:31,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 266 SyntacticMatches, 1 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8202 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=3821, Invalid=40489, Unknown=0, NotChecked=0, Total=44310 [2021-12-16 22:50:31,335 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 122 mSDsluCounter, 1685 mSDsCounter, 0 mSdLazyCounter, 1982 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 1736 SdHoareTripleChecker+Invalid, 3003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 966 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 22:50:31,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 1736 Invalid, 3003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1982 Invalid, 0 Unknown, 966 Unchecked, 0.6s Time] [2021-12-16 22:50:31,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-12-16 22:50:31,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2021-12-16 22:50:31,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.0124223602484472) internal successors, (163), 161 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:50:31,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2021-12-16 22:50:31,371 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 158 [2021-12-16 22:50:31,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:50:31,371 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2021-12-16 22:50:31,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 3.2950819672131146) internal successors, (402), 122 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:50:31,372 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2021-12-16 22:50:31,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-16 22:50:31,372 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:50:31,372 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:50:31,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-12-16 22:50:31,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:50:31,573 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:50:31,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:50:31,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1235123466, now seen corresponding path program 55 times [2021-12-16 22:50:31,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:50:31,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464287609] [2021-12-16 22:50:31,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:50:31,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:50:31,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:50:32,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1664 backedges. 0 proven. 1664 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:50:32,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:50:32,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464287609] [2021-12-16 22:50:32,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464287609] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:50:32,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576660572] [2021-12-16 22:50:32,488 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 22:50:32,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:50:32,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:50:32,490 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:50:32,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-12-16 22:50:32,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:50:32,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 100 conjunts are in the unsatisfiable core [2021-12-16 22:50:32,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:50:32,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:50:32,977 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-16 22:50:32,977 INFO L388 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 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-16 22:50:34,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1664 backedges. 0 proven. 1664 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:50:34,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:50:34,413 INFO L388 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 16 treesize of output 14 [2021-12-16 22:50:34,415 INFO L388 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 28 treesize of output 24 [2021-12-16 22:50:34,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1664 backedges. 0 proven. 1664 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:50:34,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576660572] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:50:34,617 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:50:34,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 50] total 74 [2021-12-16 22:50:34,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361735613] [2021-12-16 22:50:34,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:50:34,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-12-16 22:50:34,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:50:34,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-12-16 22:50:34,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=5163, Unknown=0, NotChecked=0, Total=5402 [2021-12-16 22:50:34,618 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand has 74 states, 74 states have (on average 3.445945945945946) internal successors, (255), 74 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:50:37,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:50:37,939 INFO L93 Difference]: Finished difference Result 271 states and 273 transitions. [2021-12-16 22:50:37,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-12-16 22:50:37,939 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.445945945945946) internal successors, (255), 74 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2021-12-16 22:50:37,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:50:37,940 INFO L225 Difference]: With dead ends: 271 [2021-12-16 22:50:37,940 INFO L226 Difference]: Without dead ends: 269 [2021-12-16 22:50:37,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 290 SyntacticMatches, 8 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4542 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=645, Invalid=19661, Unknown=0, NotChecked=0, Total=20306 [2021-12-16 22:50:37,941 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 240 mSDsluCounter, 2654 mSDsCounter, 0 mSdLazyCounter, 6374 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 2708 SdHoareTripleChecker+Invalid, 6671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 6374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-16 22:50:37,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 2708 Invalid, 6671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 6374 Invalid, 0 Unknown, 9 Unchecked, 1.8s Time] [2021-12-16 22:50:37,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-12-16 22:50:37,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 170. [2021-12-16 22:50:37,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.017751479289941) internal successors, (172), 169 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:50:37,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 172 transitions. [2021-12-16 22:50:37,987 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 172 transitions. Word has length 161 [2021-12-16 22:50:37,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:50:37,987 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 172 transitions. [2021-12-16 22:50:37,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.445945945945946) internal successors, (255), 74 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:50:37,988 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 172 transitions. [2021-12-16 22:50:37,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-16 22:50:37,988 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:50:37,988 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:50:38,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-12-16 22:50:38,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:50:38,203 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:50:38,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:50:38,204 INFO L85 PathProgramCache]: Analyzing trace with hash 842431553, now seen corresponding path program 56 times [2021-12-16 22:50:38,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:50:38,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319136525] [2021-12-16 22:50:38,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:50:38,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:50:38,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:50:39,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1734 backedges. 0 proven. 1734 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:50:39,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:50:39,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319136525] [2021-12-16 22:50:39,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319136525] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:50:39,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161486953] [2021-12-16 22:50:39,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:50:39,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:50:39,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:50:39,198 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:50:39,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-12-16 22:50:39,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:50:39,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:50:39,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 105 conjunts are in the unsatisfiable core [2021-12-16 22:50:39,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:50:39,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:50:39,611 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-16 22:50:39,612 INFO L388 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-16 22:50:39,727 INFO L354 Elim1Store]: treesize reduction 80, result has 20.8 percent of original size [2021-12-16 22:50:39,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 38 [2021-12-16 22:50:41,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1734 backedges. 2 proven. 1732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:50:41,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:50:42,343 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_2918| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_2918| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (and (< 20 |v_ULTIMATE.start_main_~i~0#1_2918|) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_2918| 4)) 0) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 84)) 0)))) is different from false [2021-12-16 22:50:42,354 INFO L388 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 27 treesize of output 25 [2021-12-16 22:50:42,356 INFO L388 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 53 treesize of output 49 [2021-12-16 22:50:42,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1734 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 23 not checked. [2021-12-16 22:50:42,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161486953] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:50:42,565 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:50:42,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 52, 52] total 81 [2021-12-16 22:50:42,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889707770] [2021-12-16 22:50:42,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:50:42,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-12-16 22:50:42,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:50:42,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-12-16 22:50:42,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=6019, Unknown=1, NotChecked=156, Total=6480 [2021-12-16 22:50:42,566 INFO L87 Difference]: Start difference. First operand 170 states and 172 transitions. Second operand has 81 states, 81 states have (on average 3.308641975308642) internal successors, (268), 81 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:50:44,312 WARN L838 $PredicateComparison]: unable to prove that (and (<= 21 |c_ULTIMATE.start_main_~i~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_2918| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_2918| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (and (< 20 |v_ULTIMATE.start_main_~i~0#1_2918|) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_2918| 4)) 0) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 84)) 0)))) (<= |c_ULTIMATE.start_main_~i~0#1| 21) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)) 0)) is different from false [2021-12-16 22:50:44,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:50:44,471 INFO L93 Difference]: Finished difference Result 261 states and 263 transitions. [2021-12-16 22:50:44,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-12-16 22:50:44,471 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.308641975308642) internal successors, (268), 81 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2021-12-16 22:50:44,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:50:44,472 INFO L225 Difference]: With dead ends: 261 [2021-12-16 22:50:44,472 INFO L226 Difference]: Without dead ends: 259 [2021-12-16 22:50:44,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 291 SyntacticMatches, 8 SemanticMatches, 101 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1654 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=390, Invalid=9716, Unknown=2, NotChecked=398, Total=10506 [2021-12-16 22:50:44,473 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 132 mSDsluCounter, 2405 mSDsCounter, 0 mSdLazyCounter, 3496 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 2456 SdHoareTripleChecker+Invalid, 4584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 3496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1058 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:50:44,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 2456 Invalid, 4584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 3496 Invalid, 0 Unknown, 1058 Unchecked, 1.0s Time] [2021-12-16 22:50:44,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-12-16 22:50:44,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 166. [2021-12-16 22:50:44,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.0121212121212122) internal successors, (167), 165 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:50:44,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 167 transitions. [2021-12-16 22:50:44,514 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 167 transitions. Word has length 164 [2021-12-16 22:50:44,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:50:44,514 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 167 transitions. [2021-12-16 22:50:44,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.308641975308642) internal successors, (268), 81 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:50:44,515 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 167 transitions. [2021-12-16 22:50:44,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-12-16 22:50:44,515 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:50:44,515 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:50:44,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-12-16 22:50:44,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:50:44,731 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:50:44,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:50:44,732 INFO L85 PathProgramCache]: Analyzing trace with hash -599898772, now seen corresponding path program 57 times [2021-12-16 22:50:44,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:50:44,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272407021] [2021-12-16 22:50:44,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:50:44,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:50:44,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:50:45,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1750 backedges. 0 proven. 1750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:50:45,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:50:45,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272407021] [2021-12-16 22:50:45,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272407021] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:50:45,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2562120] [2021-12-16 22:50:45,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:50:45,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:50:45,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:50:45,663 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:50:45,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-12-16 22:50:48,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-12-16 22:50:48,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:50:48,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-16 22:50:48,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:50:49,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:50:51,632 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-16 22:50:51,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2021-12-16 22:50:51,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1750 backedges. 946 proven. 804 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:50:51,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:50:54,387 INFO L388 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 18 treesize of output 16 [2021-12-16 22:50:54,389 INFO L388 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 34 treesize of output 28 [2021-12-16 22:50:54,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1750 backedges. 924 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:50:54,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2562120] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:50:54,480 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:50:54,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 52, 52] total 127 [2021-12-16 22:50:54,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302260483] [2021-12-16 22:50:54,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:50:54,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2021-12-16 22:50:54,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:50:54,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2021-12-16 22:50:54,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1724, Invalid=14278, Unknown=0, NotChecked=0, Total=16002 [2021-12-16 22:50:54,482 INFO L87 Difference]: Start difference. First operand 166 states and 167 transitions. Second operand has 127 states, 127 states have (on average 3.3070866141732282) internal successors, (420), 127 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:50:58,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:50:58,136 INFO L93 Difference]: Finished difference Result 265 states and 267 transitions. [2021-12-16 22:50:58,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-12-16 22:50:58,136 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 3.3070866141732282) internal successors, (420), 127 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-12-16 22:50:58,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:50:58,137 INFO L225 Difference]: With dead ends: 265 [2021-12-16 22:50:58,137 INFO L226 Difference]: Without dead ends: 169 [2021-12-16 22:50:58,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 297 SyntacticMatches, 1 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6744 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=3362, Invalid=35250, Unknown=0, NotChecked=0, Total=38612 [2021-12-16 22:50:58,139 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 150 mSDsluCounter, 1393 mSDsCounter, 0 mSdLazyCounter, 1878 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 1443 SdHoareTripleChecker+Invalid, 2182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 249 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 22:50:58,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 1443 Invalid, 2182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1878 Invalid, 0 Unknown, 249 Unchecked, 0.6s Time] [2021-12-16 22:50:58,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-12-16 22:50:58,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2021-12-16 22:50:58,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.0119047619047619) internal successors, (170), 168 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:50:58,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2021-12-16 22:50:58,181 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 165 [2021-12-16 22:50:58,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:50:58,181 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2021-12-16 22:50:58,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 3.3070866141732282) internal successors, (420), 127 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:50:58,181 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2021-12-16 22:50:58,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-16 22:50:58,182 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:50:58,182 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:50:58,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-12-16 22:50:58,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:50:58,387 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:50:58,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:50:58,388 INFO L85 PathProgramCache]: Analyzing trace with hash 118464823, now seen corresponding path program 58 times [2021-12-16 22:50:58,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:50:58,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490446878] [2021-12-16 22:50:58,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:50:58,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:50:58,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:50:59,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:50:59,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:50:59,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490446878] [2021-12-16 22:50:59,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490446878] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:50:59,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994021893] [2021-12-16 22:50:59,373 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 22:50:59,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:50:59,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:50:59,375 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:50:59,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-12-16 22:50:59,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 22:50:59,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:50:59,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 104 conjunts are in the unsatisfiable core [2021-12-16 22:50:59,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:50:59,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:50:59,843 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-16 22:50:59,843 INFO L388 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 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-16 22:51:01,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:51:01,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:51:01,371 INFO L388 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 16 treesize of output 14 [2021-12-16 22:51:01,373 INFO L388 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 28 treesize of output 24 [2021-12-16 22:51:01,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:51:01,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994021893] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:51:01,576 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:51:01,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 52] total 77 [2021-12-16 22:51:01,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323836762] [2021-12-16 22:51:01,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:51:01,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-12-16 22:51:01,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:51:01,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-12-16 22:51:01,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=5603, Unknown=0, NotChecked=0, Total=5852 [2021-12-16 22:51:01,578 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand has 77 states, 77 states have (on average 3.4545454545454546) internal successors, (266), 77 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:51:05,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:51:05,161 INFO L93 Difference]: Finished difference Result 282 states and 284 transitions. [2021-12-16 22:51:05,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-12-16 22:51:05,161 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.4545454545454546) internal successors, (266), 77 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2021-12-16 22:51:05,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:51:05,162 INFO L225 Difference]: With dead ends: 282 [2021-12-16 22:51:05,162 INFO L226 Difference]: Without dead ends: 280 [2021-12-16 22:51:05,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 302 SyntacticMatches, 9 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4939 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=672, Invalid=21380, Unknown=0, NotChecked=0, Total=22052 [2021-12-16 22:51:05,163 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 200 mSDsluCounter, 2894 mSDsCounter, 0 mSdLazyCounter, 6784 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 2950 SdHoareTripleChecker+Invalid, 7091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 6784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:51:05,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 2950 Invalid, 7091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 6784 Invalid, 0 Unknown, 49 Unchecked, 2.0s Time] [2021-12-16 22:51:05,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-12-16 22:51:05,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 177. [2021-12-16 22:51:05,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.0170454545454546) internal successors, (179), 176 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:51:05,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 179 transitions. [2021-12-16 22:51:05,208 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 179 transitions. Word has length 168 [2021-12-16 22:51:05,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:51:05,208 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 179 transitions. [2021-12-16 22:51:05,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.4545454545454546) internal successors, (266), 77 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:51:05,209 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 179 transitions. [2021-12-16 22:51:05,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-12-16 22:51:05,209 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:51:05,209 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:51:05,226 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-12-16 22:51:05,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-12-16 22:51:05,414 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:51:05,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:51:05,415 INFO L85 PathProgramCache]: Analyzing trace with hash -933712500, now seen corresponding path program 59 times [2021-12-16 22:51:05,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:51:05,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335824295] [2021-12-16 22:51:05,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:51:05,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:51:05,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:51:06,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1893 backedges. 0 proven. 1893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:51:06,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:51:06,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335824295] [2021-12-16 22:51:06,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335824295] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:51:06,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28865119] [2021-12-16 22:51:06,430 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 22:51:06,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:51:06,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:51:06,431 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:51:06,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-12-16 22:51:12,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2021-12-16 22:51:12,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:51:13,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 107 conjunts are in the unsatisfiable core [2021-12-16 22:51:13,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:51:13,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:51:13,235 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-16 22:51:13,236 INFO L388 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-16 22:51:13,286 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-16 22:51:13,286 INFO L388 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-16 22:51:14,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1893 backedges. 2 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:51:14,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:51:14,868 INFO L388 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 16 treesize of output 14 [2021-12-16 22:51:14,870 INFO L388 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 28 treesize of output 24 [2021-12-16 22:51:15,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1893 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 22:51:15,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28865119] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:51:15,066 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:51:15,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 53] total 78 [2021-12-16 22:51:15,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678720971] [2021-12-16 22:51:15,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:51:15,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-12-16 22:51:15,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:51:15,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-12-16 22:51:15,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=5751, Unknown=0, NotChecked=0, Total=6006 [2021-12-16 22:51:15,068 INFO L87 Difference]: Start difference. First operand 177 states and 179 transitions. Second operand has 78 states, 78 states have (on average 3.4743589743589745) internal successors, (271), 78 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:51:18,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:51:18,305 INFO L93 Difference]: Finished difference Result 277 states and 279 transitions. [2021-12-16 22:51:18,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-12-16 22:51:18,305 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 3.4743589743589745) internal successors, (271), 78 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 171 [2021-12-16 22:51:18,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:51:18,306 INFO L225 Difference]: With dead ends: 277 [2021-12-16 22:51:18,306 INFO L226 Difference]: Without dead ends: 275 [2021-12-16 22:51:18,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 308 SyntacticMatches, 10 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3276 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=578, Invalid=15934, Unknown=0, NotChecked=0, Total=16512 [2021-12-16 22:51:18,307 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 136 mSDsluCounter, 2951 mSDsCounter, 0 mSdLazyCounter, 7072 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 3008 SdHoareTripleChecker+Invalid, 7248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 7072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:51:18,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 3008 Invalid, 7248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 7072 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-16 22:51:18,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-12-16 22:51:18,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 173. [2021-12-16 22:51:18,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.0116279069767442) internal successors, (174), 172 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:51:18,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2021-12-16 22:51:18,360 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 171 [2021-12-16 22:51:18,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:51:18,360 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2021-12-16 22:51:18,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 3.4743589743589745) internal successors, (271), 78 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:51:18,360 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2021-12-16 22:51:18,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-12-16 22:51:18,361 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:51:18,361 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:51:18,370 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-12-16 22:51:18,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:51:18,561 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:51:18,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:51:18,562 INFO L85 PathProgramCache]: Analyzing trace with hash -801023187, now seen corresponding path program 60 times [2021-12-16 22:51:18,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:51:18,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257575107] [2021-12-16 22:51:18,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:51:18,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:51:18,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:51:19,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1910 backedges. 0 proven. 1910 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:51:19,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:51:19,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257575107] [2021-12-16 22:51:19,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257575107] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:51:19,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101940715] [2021-12-16 22:51:19,576 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 22:51:19,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:51:19,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:51:19,577 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:51:19,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-12-16 22:51:31,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-12-16 22:51:31,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:51:31,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-16 22:51:31,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:51:32,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:51:34,585 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-16 22:51:34,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2021-12-16 22:51:34,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1910 backedges. 1035 proven. 875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:51:34,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:51:37,833 INFO L388 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 18 treesize of output 16 [2021-12-16 22:51:37,835 INFO L388 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 34 treesize of output 28 [2021-12-16 22:51:37,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1910 backedges. 1012 proven. 898 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:51:37,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101940715] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:51:37,932 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:51:37,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 54, 54] total 132 [2021-12-16 22:51:37,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204190232] [2021-12-16 22:51:37,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:51:37,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2021-12-16 22:51:37,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:51:37,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2021-12-16 22:51:37,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1857, Invalid=15434, Unknown=1, NotChecked=0, Total=17292 [2021-12-16 22:51:37,934 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand has 132 states, 132 states have (on average 3.3181818181818183) internal successors, (438), 132 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:51:41,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:51:41,944 INFO L93 Difference]: Finished difference Result 276 states and 278 transitions. [2021-12-16 22:51:41,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-12-16 22:51:41,944 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 3.3181818181818183) internal successors, (438), 132 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 172 [2021-12-16 22:51:41,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:51:41,945 INFO L225 Difference]: With dead ends: 276 [2021-12-16 22:51:41,945 INFO L226 Difference]: Without dead ends: 176 [2021-12-16 22:51:41,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 311 SyntacticMatches, 1 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7287 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=3614, Invalid=38205, Unknown=1, NotChecked=0, Total=41820 [2021-12-16 22:51:41,947 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 106 mSDsluCounter, 1871 mSDsCounter, 0 mSdLazyCounter, 2139 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 1923 SdHoareTripleChecker+Invalid, 2460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 2139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 268 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 22:51:41,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 1923 Invalid, 2460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 2139 Invalid, 0 Unknown, 268 Unchecked, 0.6s Time] [2021-12-16 22:51:41,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-12-16 22:51:41,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2021-12-16 22:51:41,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.0114285714285713) internal successors, (177), 175 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:51:41,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 177 transitions. [2021-12-16 22:51:41,994 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 177 transitions. Word has length 172 [2021-12-16 22:51:41,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:51:41,994 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 177 transitions. [2021-12-16 22:51:41,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 3.3181818181818183) internal successors, (438), 132 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:51:41,995 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 177 transitions. [2021-12-16 22:51:41,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-12-16 22:51:41,995 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:51:41,995 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:51:42,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-12-16 22:51:42,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-12-16 22:51:42,206 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:51:42,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:51:42,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1926378754, now seen corresponding path program 61 times [2021-12-16 22:51:42,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:51:42,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350660084] [2021-12-16 22:51:42,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:51:42,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:51:42,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:51:43,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1983 backedges. 0 proven. 1983 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:51:43,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:51:43,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350660084] [2021-12-16 22:51:43,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350660084] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:51:43,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857651955] [2021-12-16 22:51:43,281 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 22:51:43,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:51:43,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:51:43,282 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:51:43,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-12-16 22:51:43,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:51:43,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 108 conjunts are in the unsatisfiable core [2021-12-16 22:51:43,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:51:43,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:51:43,771 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-16 22:51:43,771 INFO L388 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 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-16 22:51:45,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1983 backedges. 0 proven. 1983 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:51:45,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:51:45,411 INFO L388 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 16 treesize of output 14 [2021-12-16 22:51:45,413 INFO L388 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 28 treesize of output 24 [2021-12-16 22:51:45,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1983 backedges. 0 proven. 1983 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:51:45,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857651955] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:51:45,630 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:51:45,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53, 54] total 80 [2021-12-16 22:51:45,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765791821] [2021-12-16 22:51:45,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:51:45,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-12-16 22:51:45,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:51:45,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-12-16 22:51:45,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=6061, Unknown=0, NotChecked=0, Total=6320 [2021-12-16 22:51:45,631 INFO L87 Difference]: Start difference. First operand 176 states and 177 transitions. Second operand has 80 states, 80 states have (on average 3.4625) internal successors, (277), 80 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:51:49,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:51:49,779 INFO L93 Difference]: Finished difference Result 293 states and 295 transitions. [2021-12-16 22:51:49,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-12-16 22:51:49,779 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.4625) internal successors, (277), 80 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-12-16 22:51:49,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:51:49,780 INFO L225 Difference]: With dead ends: 293 [2021-12-16 22:51:49,780 INFO L226 Difference]: Without dead ends: 291 [2021-12-16 22:51:49,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 314 SyntacticMatches, 10 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 5345 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=699, Invalid=23171, Unknown=0, NotChecked=0, Total=23870 [2021-12-16 22:51:49,781 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 260 mSDsluCounter, 3195 mSDsCounter, 0 mSdLazyCounter, 7821 mSolverCounterSat, 314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 3253 SdHoareTripleChecker+Invalid, 8144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 7821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-16 22:51:49,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 3253 Invalid, 8144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [314 Valid, 7821 Invalid, 0 Unknown, 9 Unchecked, 2.4s Time] [2021-12-16 22:51:49,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-12-16 22:51:49,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 184. [2021-12-16 22:51:49,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.0163934426229508) internal successors, (186), 183 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:51:49,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 186 transitions. [2021-12-16 22:51:49,832 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 186 transitions. Word has length 175 [2021-12-16 22:51:49,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:51:49,832 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 186 transitions. [2021-12-16 22:51:49,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.4625) internal successors, (277), 80 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:51:49,833 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 186 transitions. [2021-12-16 22:51:49,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-16 22:51:49,833 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:51:49,833 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:51:49,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-12-16 22:51:50,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-12-16 22:51:50,051 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:51:50,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:51:50,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1766297357, now seen corresponding path program 62 times [2021-12-16 22:51:50,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:51:50,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300377766] [2021-12-16 22:51:50,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:51:50,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:51:50,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:51:51,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:51:51,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:51:51,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300377766] [2021-12-16 22:51:51,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300377766] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:51:51,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814626068] [2021-12-16 22:51:51,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:51:51,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:51:51,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:51:51,190 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:51:51,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-12-16 22:51:51,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:51:51,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:51:51,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 113 conjunts are in the unsatisfiable core [2021-12-16 22:51:51,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:51:51,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:51:51,700 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-16 22:51:51,700 INFO L388 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-16 22:51:51,826 INFO L354 Elim1Store]: treesize reduction 80, result has 20.8 percent of original size [2021-12-16 22:51:51,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 38 [2021-12-16 22:51:53,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 2 proven. 2057 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:51:53,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:51:54,819 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_3488| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_3488| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (and (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_3488| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 92)) 0) (< 22 |v_ULTIMATE.start_main_~i~0#1_3488|)))) is different from false [2021-12-16 22:51:54,824 INFO L388 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 27 treesize of output 25 [2021-12-16 22:51:54,826 INFO L388 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 53 treesize of output 49 [2021-12-16 22:51:55,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 0 proven. 2034 refuted. 0 times theorem prover too weak. 0 trivial. 25 not checked. [2021-12-16 22:51:55,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814626068] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:51:55,048 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:51:55,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 56, 56] total 87 [2021-12-16 22:51:55,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089209728] [2021-12-16 22:51:55,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:51:55,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-12-16 22:51:55,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:51:55,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-12-16 22:51:55,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=6987, Unknown=1, NotChecked=168, Total=7482 [2021-12-16 22:51:55,049 INFO L87 Difference]: Start difference. First operand 184 states and 186 transitions. Second operand has 87 states, 87 states have (on average 3.3333333333333335) internal successors, (290), 87 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:51:56,407 WARN L838 $PredicateComparison]: unable to prove that (and (<= 23 |c_ULTIMATE.start_main_~i~0#1|) (<= |c_ULTIMATE.start_main_~i~0#1| 23) (forall ((|v_ULTIMATE.start_main_~i~0#1_3488| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_3488| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (and (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_3488| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 92)) 0) (< 22 |v_ULTIMATE.start_main_~i~0#1_3488|)))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)) 0)) is different from false [2021-12-16 22:51:56,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:51:56,588 INFO L93 Difference]: Finished difference Result 283 states and 285 transitions. [2021-12-16 22:51:56,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-16 22:51:56,588 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 3.3333333333333335) internal successors, (290), 87 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 178 [2021-12-16 22:51:56,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:51:56,589 INFO L225 Difference]: With dead ends: 283 [2021-12-16 22:51:56,589 INFO L226 Difference]: Without dead ends: 281 [2021-12-16 22:51:56,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 317 SyntacticMatches, 8 SemanticMatches, 86 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=328, Invalid=6988, Unknown=2, NotChecked=338, Total=7656 [2021-12-16 22:51:56,589 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 187 mSDsluCounter, 2666 mSDsCounter, 0 mSdLazyCounter, 3571 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 2721 SdHoareTripleChecker+Invalid, 3976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 3571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 402 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:51:56,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 2721 Invalid, 3976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 3571 Invalid, 0 Unknown, 402 Unchecked, 1.0s Time] [2021-12-16 22:51:56,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-12-16 22:51:56,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 180. [2021-12-16 22:51:56,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.011173184357542) internal successors, (181), 179 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:51:56,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 181 transitions. [2021-12-16 22:51:56,648 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 181 transitions. Word has length 178 [2021-12-16 22:51:56,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:51:56,648 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 181 transitions. [2021-12-16 22:51:56,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 3.3333333333333335) internal successors, (290), 87 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:51:56,648 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 181 transitions. [2021-12-16 22:51:56,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-16 22:51:56,648 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:51:56,649 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:51:56,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-12-16 22:51:56,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-12-16 22:51:56,859 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:51:56,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:51:56,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1381035656, now seen corresponding path program 63 times [2021-12-16 22:51:56,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:51:56,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137098550] [2021-12-16 22:51:56,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:51:56,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:51:56,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:51:57,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2077 backedges. 0 proven. 2077 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:51:57,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:51:57,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137098550] [2021-12-16 22:51:57,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137098550] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:51:57,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130655637] [2021-12-16 22:51:57,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:51:57,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:51:57,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:51:57,956 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:51:57,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-12-16 22:52:08,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2021-12-16 22:52:08,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:52:08,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-16 22:52:08,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:52:09,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:52:12,195 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-16 22:52:12,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2021-12-16 22:52:12,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2077 backedges. 1128 proven. 949 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:52:12,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:52:15,409 INFO L388 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 18 treesize of output 16 [2021-12-16 22:52:15,411 INFO L388 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 34 treesize of output 28 [2021-12-16 22:52:15,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2077 backedges. 1104 proven. 973 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:52:15,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130655637] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:52:15,514 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:52:15,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 56, 56] total 137 [2021-12-16 22:52:15,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059513550] [2021-12-16 22:52:15,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:52:15,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2021-12-16 22:52:15,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:52:15,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2021-12-16 22:52:15,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1995, Invalid=16637, Unknown=0, NotChecked=0, Total=18632 [2021-12-16 22:52:15,516 INFO L87 Difference]: Start difference. First operand 180 states and 181 transitions. Second operand has 137 states, 137 states have (on average 3.3284671532846715) internal successors, (456), 137 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:52:21,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:52:21,164 INFO L93 Difference]: Finished difference Result 287 states and 289 transitions. [2021-12-16 22:52:21,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-12-16 22:52:21,164 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 3.3284671532846715) internal successors, (456), 137 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 179 [2021-12-16 22:52:21,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:52:21,165 INFO L225 Difference]: With dead ends: 287 [2021-12-16 22:52:21,165 INFO L226 Difference]: Without dead ends: 183 [2021-12-16 22:52:21,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 302 SyntacticMatches, 1 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10298 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=4691, Invalid=51241, Unknown=0, NotChecked=0, Total=55932 [2021-12-16 22:52:21,167 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 92 mSDsluCounter, 2087 mSDsCounter, 0 mSdLazyCounter, 2430 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 2144 SdHoareTripleChecker+Invalid, 3217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 756 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-16 22:52:21,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 2144 Invalid, 3217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2430 Invalid, 0 Unknown, 756 Unchecked, 0.7s Time] [2021-12-16 22:52:21,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-12-16 22:52:21,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2021-12-16 22:52:21,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.010989010989011) internal successors, (184), 182 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:52:21,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 184 transitions. [2021-12-16 22:52:21,221 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 184 transitions. Word has length 179 [2021-12-16 22:52:21,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:52:21,221 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 184 transitions. [2021-12-16 22:52:21,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 3.3284671532846715) internal successors, (456), 137 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:52:21,221 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 184 transitions. [2021-12-16 22:52:21,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-12-16 22:52:21,222 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:52:21,222 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:52:21,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-12-16 22:52:21,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-12-16 22:52:21,427 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:52:21,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:52:21,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1451388419, now seen corresponding path program 64 times [2021-12-16 22:52:21,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:52:21,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063747597] [2021-12-16 22:52:21,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:52:21,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:52:21,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:52:22,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2153 backedges. 0 proven. 2153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:52:22,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:52:22,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063747597] [2021-12-16 22:52:22,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063747597] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:52:22,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430753246] [2021-12-16 22:52:22,588 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 22:52:22,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:52:22,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:52:22,589 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:52:22,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-12-16 22:52:22,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 22:52:22,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:52:22,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 112 conjunts are in the unsatisfiable core [2021-12-16 22:52:22,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:52:23,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:52:23,129 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-16 22:52:23,129 INFO L388 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 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-16 22:52:24,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2153 backedges. 0 proven. 2153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:52:24,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:52:24,887 INFO L388 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 16 treesize of output 14 [2021-12-16 22:52:24,888 INFO L388 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 28 treesize of output 24 [2021-12-16 22:52:25,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2153 backedges. 0 proven. 2153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:52:25,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430753246] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:52:25,113 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:52:25,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55, 56] total 83 [2021-12-16 22:52:25,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770037290] [2021-12-16 22:52:25,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:52:25,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-12-16 22:52:25,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:52:25,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-12-16 22:52:25,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=6537, Unknown=0, NotChecked=0, Total=6806 [2021-12-16 22:52:25,114 INFO L87 Difference]: Start difference. First operand 183 states and 184 transitions. Second operand has 83 states, 83 states have (on average 3.4698795180722892) internal successors, (288), 83 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:52:29,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:52:29,361 INFO L93 Difference]: Finished difference Result 304 states and 306 transitions. [2021-12-16 22:52:29,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-12-16 22:52:29,361 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 3.4698795180722892) internal successors, (288), 83 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2021-12-16 22:52:29,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:52:29,362 INFO L225 Difference]: With dead ends: 304 [2021-12-16 22:52:29,362 INFO L226 Difference]: Without dead ends: 302 [2021-12-16 22:52:29,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 327 SyntacticMatches, 10 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 5766 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=726, Invalid=25034, Unknown=0, NotChecked=0, Total=25760 [2021-12-16 22:52:29,363 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 272 mSDsluCounter, 3250 mSDsCounter, 0 mSdLazyCounter, 7829 mSolverCounterSat, 327 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 3310 SdHoareTripleChecker+Invalid, 8165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 327 IncrementalHoareTripleChecker+Valid, 7829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-16 22:52:29,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 3310 Invalid, 8165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [327 Valid, 7829 Invalid, 0 Unknown, 9 Unchecked, 2.3s Time] [2021-12-16 22:52:29,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-12-16 22:52:29,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 191. [2021-12-16 22:52:29,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.0157894736842106) internal successors, (193), 190 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:52:29,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2021-12-16 22:52:29,421 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 182 [2021-12-16 22:52:29,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:52:29,421 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2021-12-16 22:52:29,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.4698795180722892) internal successors, (288), 83 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:52:29,422 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2021-12-16 22:52:29,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-16 22:52:29,422 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:52:29,422 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:52:29,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-12-16 22:52:29,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:52:29,631 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:52:29,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:52:29,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1025457768, now seen corresponding path program 65 times [2021-12-16 22:52:29,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:52:29,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739233013] [2021-12-16 22:52:29,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:52:29,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:52:29,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:52:30,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2232 backedges. 0 proven. 2232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:52:30,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:52:30,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739233013] [2021-12-16 22:52:30,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739233013] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:52:30,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374543875] [2021-12-16 22:52:30,812 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 22:52:30,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:52:30,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:52:30,813 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:52:30,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-12-16 22:52:31,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2021-12-16 22:52:31,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:52:31,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 115 conjunts are in the unsatisfiable core [2021-12-16 22:52:31,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:52:31,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:52:32,016 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-16 22:52:32,016 INFO L388 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-16 22:52:32,081 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-16 22:52:32,081 INFO L388 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-16 22:52:33,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2232 backedges. 2 proven. 2230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:52:33,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:52:33,931 INFO L388 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 16 treesize of output 14 [2021-12-16 22:52:33,933 INFO L388 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 28 treesize of output 24 [2021-12-16 22:52:34,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2232 backedges. 0 proven. 2231 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 22:52:34,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374543875] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:52:34,151 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:52:34,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 57] total 84 [2021-12-16 22:52:34,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335387607] [2021-12-16 22:52:34,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:52:34,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-12-16 22:52:34,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:52:34,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-12-16 22:52:34,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=6697, Unknown=0, NotChecked=0, Total=6972 [2021-12-16 22:52:34,152 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand has 84 states, 84 states have (on average 3.488095238095238) internal successors, (293), 84 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:52:37,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:52:37,933 INFO L93 Difference]: Finished difference Result 299 states and 301 transitions. [2021-12-16 22:52:37,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-12-16 22:52:37,934 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 3.488095238095238) internal successors, (293), 84 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-12-16 22:52:37,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:52:37,935 INFO L225 Difference]: With dead ends: 299 [2021-12-16 22:52:37,935 INFO L226 Difference]: Without dead ends: 297 [2021-12-16 22:52:37,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 333 SyntacticMatches, 11 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3782 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=622, Invalid=18560, Unknown=0, NotChecked=0, Total=19182 [2021-12-16 22:52:37,936 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 150 mSDsluCounter, 3250 mSDsCounter, 0 mSdLazyCounter, 8090 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 3311 SdHoareTripleChecker+Invalid, 8284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 8090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-16 22:52:37,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 3311 Invalid, 8284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 8090 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-16 22:52:37,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-12-16 22:52:37,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 187. [2021-12-16 22:52:37,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.010752688172043) internal successors, (188), 186 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:52:37,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2021-12-16 22:52:37,995 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 185 [2021-12-16 22:52:37,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:52:37,995 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2021-12-16 22:52:37,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 3.488095238095238) internal successors, (293), 84 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:52:37,995 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2021-12-16 22:52:37,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-12-16 22:52:37,996 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:52:37,996 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:52:38,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-12-16 22:52:38,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:52:38,199 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:52:38,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:52:38,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1554571769, now seen corresponding path program 66 times [2021-12-16 22:52:38,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:52:38,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418495254] [2021-12-16 22:52:38,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:52:38,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:52:38,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:52:39,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 0 proven. 2251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:52:39,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:52:39,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418495254] [2021-12-16 22:52:39,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418495254] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:52:39,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919118167] [2021-12-16 22:52:39,386 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 22:52:39,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:52:39,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:52:39,387 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:52:39,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process Killed by 15