./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum_const_m2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-crafted/zero_sum_const_m2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 06c952a07d861e134050c8036ebe12899287d1c68b93fe51209b5cc562011a68 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 08:42:02,030 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 08:42:02,033 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 08:42:02,081 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 08:42:02,082 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 08:42:02,085 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 08:42:02,086 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 08:42:02,089 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 08:42:02,091 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 08:42:02,095 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 08:42:02,096 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 08:42:02,098 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 08:42:02,098 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 08:42:02,100 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 08:42:02,103 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 08:42:02,106 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 08:42:02,108 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 08:42:02,108 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 08:42:02,111 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 08:42:02,118 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 08:42:02,120 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 08:42:02,121 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 08:42:02,123 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 08:42:02,124 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 08:42:02,130 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 08:42:02,130 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 08:42:02,130 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 08:42:02,132 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 08:42:02,132 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 08:42:02,133 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 08:42:02,134 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 08:42:02,135 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 08:42:02,136 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 08:42:02,137 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 08:42:02,138 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 08:42:02,138 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 08:42:02,139 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 08:42:02,139 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 08:42:02,140 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 08:42:02,140 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 08:42:02,141 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 08:42:02,143 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 08:42:02,169 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 08:42:02,169 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 08:42:02,170 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 08:42:02,170 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 08:42:02,171 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 08:42:02,171 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 08:42:02,172 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 08:42:02,172 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 08:42:02,172 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 08:42:02,172 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 08:42:02,173 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 08:42:02,173 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 08:42:02,173 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 08:42:02,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 08:42:02,174 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 08:42:02,174 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 08:42:02,174 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 08:42:02,175 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 08:42:02,175 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 08:42:02,175 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 08:42:02,175 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 08:42:02,175 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 08:42:02,176 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 08:42:02,176 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 08:42:02,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:42:02,176 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 08:42:02,176 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 08:42:02,177 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 08:42:02,177 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 08:42:02,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 08:42:02,177 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 08:42:02,177 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 08:42:02,178 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 08:42:02,178 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 08:42:02,178 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 06c952a07d861e134050c8036ebe12899287d1c68b93fe51209b5cc562011a68 [2021-12-15 08:42:02,433 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 08:42:02,464 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 08:42:02,466 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 08:42:02,468 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 08:42:02,469 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 08:42:02,470 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_const_m2.c [2021-12-15 08:42:02,556 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b29a29b50/2256000d00594a79ae21baacc37c79ad/FLAGd08ac8e83 [2021-12-15 08:42:03,008 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 08:42:03,008 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const_m2.c [2021-12-15 08:42:03,013 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b29a29b50/2256000d00594a79ae21baacc37c79ad/FLAGd08ac8e83 [2021-12-15 08:42:03,498 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b29a29b50/2256000d00594a79ae21baacc37c79ad [2021-12-15 08:42:03,500 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 08:42:03,501 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 08:42:03,505 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 08:42:03,505 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 08:42:03,508 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 08:42:03,509 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:42:03" (1/1) ... [2021-12-15 08:42:03,510 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1347fcb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:42:03, skipping insertion in model container [2021-12-15 08:42:03,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:42:03" (1/1) ... [2021-12-15 08:42:03,516 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 08:42:03,531 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 08:42:03,663 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const_m2.c[408,421] [2021-12-15 08:42:03,685 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:42:03,693 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 08:42:03,709 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const_m2.c[408,421] [2021-12-15 08:42:03,728 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:42:03,740 INFO L208 MainTranslator]: Completed translation [2021-12-15 08:42:03,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:42:03 WrapperNode [2021-12-15 08:42:03,741 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 08:42:03,742 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 08:42:03,742 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 08:42:03,742 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 08:42:03,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:42:03" (1/1) ... [2021-12-15 08:42:03,755 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:42:03" (1/1) ... [2021-12-15 08:42:03,782 INFO L137 Inliner]: procedures = 16, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 82 [2021-12-15 08:42:03,782 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 08:42:03,783 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 08:42:03,783 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 08:42:03,783 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 08:42:03,789 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:42:03" (1/1) ... [2021-12-15 08:42:03,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:42:03" (1/1) ... [2021-12-15 08:42:03,799 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:42:03" (1/1) ... [2021-12-15 08:42:03,799 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:42:03" (1/1) ... [2021-12-15 08:42:03,803 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:42:03" (1/1) ... [2021-12-15 08:42:03,810 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:42:03" (1/1) ... [2021-12-15 08:42:03,811 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:42:03" (1/1) ... [2021-12-15 08:42:03,816 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 08:42:03,817 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 08:42:03,818 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 08:42:03,818 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 08:42:03,819 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:42:03" (1/1) ... [2021-12-15 08:42:03,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:42:03,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:42:03,845 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) [2021-12-15 08:42:03,847 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 [2021-12-15 08:42:03,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 08:42:03,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 08:42:03,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 08:42:03,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-15 08:42:03,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 08:42:03,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 08:42:03,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 08:42:03,932 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 08:42:03,934 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 08:42:04,083 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 08:42:04,089 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 08:42:04,089 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-15 08:42:04,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:42:04 BoogieIcfgContainer [2021-12-15 08:42:04,091 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 08:42:04,093 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 08:42:04,093 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 08:42:04,096 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 08:42:04,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 08:42:03" (1/3) ... [2021-12-15 08:42:04,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1de8fbcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:42:04, skipping insertion in model container [2021-12-15 08:42:04,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:42:03" (2/3) ... [2021-12-15 08:42:04,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1de8fbcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:42:04, skipping insertion in model container [2021-12-15 08:42:04,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:42:04" (3/3) ... [2021-12-15 08:42:04,099 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m2.c [2021-12-15 08:42:04,106 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 08:42:04,106 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 08:42:04,199 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 08:42:04,205 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 [2021-12-15 08:42:04,205 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 08:42:04,234 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:42:04,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-15 08:42:04,238 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:42:04,239 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:42:04,239 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:42:04,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:42:04,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1122046426, now seen corresponding path program 1 times [2021-12-15 08:42:04,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:42:04,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216065472] [2021-12-15 08:42:04,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:42:04,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:42:04,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:42:04,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:42:04,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:42:04,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216065472] [2021-12-15 08:42:04,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216065472] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:42:04,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:42:04,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 08:42:04,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925916372] [2021-12-15 08:42:04,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:42:04,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 08:42:04,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:42:04,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 08:42:04,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 08:42:04,414 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:42:04,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:42:04,435 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2021-12-15 08:42:04,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 08:42:04,437 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-15 08:42:04,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:42:04,445 INFO L225 Difference]: With dead ends: 47 [2021-12-15 08:42:04,445 INFO L226 Difference]: Without dead ends: 21 [2021-12-15 08:42:04,448 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 [2021-12-15 08:42:04,456 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:42:04,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:42:04,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-12-15 08:42:04,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-12-15 08:42:04,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:42:04,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-12-15 08:42:04,487 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 15 [2021-12-15 08:42:04,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:42:04,487 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-12-15 08:42:04,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:42:04,487 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-12-15 08:42:04,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-15 08:42:04,488 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:42:04,488 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:42:04,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 08:42:04,488 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:42:04,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:42:04,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1896542740, now seen corresponding path program 1 times [2021-12-15 08:42:04,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:42:04,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687433861] [2021-12-15 08:42:04,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:42:04,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:42:04,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:42:04,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:42:04,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:42:04,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687433861] [2021-12-15 08:42:04,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687433861] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:42:04,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:42:04,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 08:42:04,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005709751] [2021-12-15 08:42:04,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:42:04,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 08:42:04,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:42:04,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 08:42:04,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 08:42:04,571 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:42:04,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:42:04,606 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2021-12-15 08:42:04,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 08:42:04,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-15 08:42:04,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:42:04,608 INFO L225 Difference]: With dead ends: 39 [2021-12-15 08:42:04,608 INFO L226 Difference]: Without dead ends: 23 [2021-12-15 08:42:04,608 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 [2021-12-15 08:42:04,610 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:42:04,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 26 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:42:04,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-15 08:42:04,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-12-15 08:42:04,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:42:04,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-12-15 08:42:04,615 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2021-12-15 08:42:04,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:42:04,615 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-12-15 08:42:04,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:42:04,616 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-12-15 08:42:04,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-15 08:42:04,616 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:42:04,617 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:42:04,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 08:42:04,617 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:42:04,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:42:04,618 INFO L85 PathProgramCache]: Analyzing trace with hash -66597874, now seen corresponding path program 1 times [2021-12-15 08:42:04,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:42:04,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489810281] [2021-12-15 08:42:04,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:42:04,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:42:04,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:42:04,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 08:42:04,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:42:04,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489810281] [2021-12-15 08:42:04,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489810281] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:42:04,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:42:04,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:42:04,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643856332] [2021-12-15 08:42:04,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:42:04,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:42:04,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:42:04,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:42:04,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:42:04,755 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:42:04,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:42:04,829 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2021-12-15 08:42:04,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:42:04,830 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-15 08:42:04,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:42:04,831 INFO L225 Difference]: With dead ends: 44 [2021-12-15 08:42:04,832 INFO L226 Difference]: Without dead ends: 31 [2021-12-15 08:42:04,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:42:04,834 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:42:04,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 13 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:42:04,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-15 08:42:04,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2021-12-15 08:42:04,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:42:04,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-12-15 08:42:04,845 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2021-12-15 08:42:04,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:42:04,846 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-12-15 08:42:04,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:42:04,846 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-12-15 08:42:04,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-15 08:42:04,847 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:42:04,848 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:42:04,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 08:42:04,849 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:42:04,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:42:04,850 INFO L85 PathProgramCache]: Analyzing trace with hash -2060422634, now seen corresponding path program 1 times [2021-12-15 08:42:04,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:42:04,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022513497] [2021-12-15 08:42:04,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:42:04,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:42:04,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:42:04,905 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 08:42:04,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:42:04,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022513497] [2021-12-15 08:42:04,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022513497] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:42:04,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238525281] [2021-12-15 08:42:04,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:42:04,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:42:04,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:42:04,915 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) [2021-12-15 08:42:04,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 08:42:04,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:42:04,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 08:42:04,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:42:05,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 08:42:05,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:42:05,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 08:42:05,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238525281] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:42:05,146 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:42:05,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-15 08:42:05,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280943846] [2021-12-15 08:42:05,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:42:05,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 08:42:05,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:42:05,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 08:42:05,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-12-15 08:42:05,149 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:42:05,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:42:05,198 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2021-12-15 08:42:05,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 08:42:05,199 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-15 08:42:05,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:42:05,200 INFO L225 Difference]: With dead ends: 49 [2021-12-15 08:42:05,200 INFO L226 Difference]: Without dead ends: 29 [2021-12-15 08:42:05,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-12-15 08:42:05,201 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:42:05,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 28 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:42:05,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-15 08:42:05,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-12-15 08:42:05,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:42:05,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-12-15 08:42:05,207 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2021-12-15 08:42:05,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:42:05,207 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-12-15 08:42:05,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:42:05,208 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-12-15 08:42:05,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-15 08:42:05,208 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:42:05,209 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:42:05,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 08:42:05,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:42:05,432 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:42:05,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:42:05,432 INFO L85 PathProgramCache]: Analyzing trace with hash -959615560, now seen corresponding path program 2 times [2021-12-15 08:42:05,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:42:05,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508846871] [2021-12-15 08:42:05,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:42:05,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:42:05,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:42:05,491 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 08:42:05,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:42:05,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508846871] [2021-12-15 08:42:05,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508846871] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:42:05,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646360898] [2021-12-15 08:42:05,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 08:42:05,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:42:05,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:42:05,494 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) [2021-12-15 08:42:05,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 08:42:05,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 08:42:05,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:42:05,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 08:42:05,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:42:05,659 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 08:42:05,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:42:05,731 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 08:42:05,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646360898] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:42:05,732 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:42:05,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-12-15 08:42:05,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436404061] [2021-12-15 08:42:05,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:42:05,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 08:42:05,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:42:05,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 08:42:05,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-12-15 08:42:05,734 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:42:05,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:42:05,840 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-12-15 08:42:05,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 08:42:05,840 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-15 08:42:05,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:42:05,841 INFO L225 Difference]: With dead ends: 57 [2021-12-15 08:42:05,841 INFO L226 Difference]: Without dead ends: 41 [2021-12-15 08:42:05,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2021-12-15 08:42:05,842 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:42:05,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 22 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:42:05,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-15 08:42:05,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2021-12-15 08:42:05,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:42:05,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-12-15 08:42:05,848 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 27 [2021-12-15 08:42:05,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:42:05,848 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-12-15 08:42:05,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:42:05,849 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-12-15 08:42:05,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-15 08:42:05,850 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:42:05,850 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:42:05,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 08:42:06,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:42:06,068 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:42:06,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:42:06,068 INFO L85 PathProgramCache]: Analyzing trace with hash -2048824896, now seen corresponding path program 3 times [2021-12-15 08:42:06,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:42:06,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106918898] [2021-12-15 08:42:06,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:42:06,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:42:06,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:42:07,110 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:42:07,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:42:07,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106918898] [2021-12-15 08:42:07,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106918898] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:42:07,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812063271] [2021-12-15 08:42:07,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 08:42:07,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:42:07,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:42:07,112 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) [2021-12-15 08:42:07,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 08:42:07,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-15 08:42:07,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:42:07,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-15 08:42:07,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:42:08,814 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 08:42:08,815 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 17 treesize of output 18 [2021-12-15 08:42:09,090 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:42:09,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:42:13,035 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 08:42:13,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 103 [2021-12-15 08:42:15,255 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:42:15,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812063271] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:42:15,255 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:42:15,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 27, 26] total 69 [2021-12-15 08:42:15,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650939856] [2021-12-15 08:42:15,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:42:15,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-12-15 08:42:15,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:42:15,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-12-15 08:42:15,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=4322, Unknown=0, NotChecked=0, Total=4692 [2021-12-15 08:42:15,260 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 69 states, 69 states have (on average 1.4057971014492754) internal successors, (97), 69 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:42:18,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:42:18,471 INFO L93 Difference]: Finished difference Result 89 states and 101 transitions. [2021-12-15 08:42:18,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-15 08:42:18,472 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.4057971014492754) internal successors, (97), 69 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-15 08:42:18,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:42:18,474 INFO L225 Difference]: With dead ends: 89 [2021-12-15 08:42:18,474 INFO L226 Difference]: Without dead ends: 83 [2021-12-15 08:42:18,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 22 SyntacticMatches, 10 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2945 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=868, Invalid=11122, Unknown=0, NotChecked=0, Total=11990 [2021-12-15 08:42:18,479 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 53 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 426 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 08:42:18,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 100 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 383 Invalid, 0 Unknown, 426 Unchecked, 0.2s Time] [2021-12-15 08:42:18,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-15 08:42:18,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 53. [2021-12-15 08:42:18,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 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) [2021-12-15 08:42:18,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2021-12-15 08:42:18,487 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 35 [2021-12-15 08:42:18,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:42:18,488 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2021-12-15 08:42:18,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.4057971014492754) internal successors, (97), 69 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:42:18,488 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2021-12-15 08:42:18,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-15 08:42:18,489 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:42:18,489 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:42:18,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-15 08:42:18,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:42:18,708 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:42:18,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:42:18,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1772469278, now seen corresponding path program 4 times [2021-12-15 08:42:18,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:42:18,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800508262] [2021-12-15 08:42:18,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:42:18,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:42:18,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:42:18,799 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 08:42:18,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:42:18,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800508262] [2021-12-15 08:42:18,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800508262] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:42:18,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960923783] [2021-12-15 08:42:18,800 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 08:42:18,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:42:18,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:42:18,801 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) [2021-12-15 08:42:18,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 08:42:18,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 08:42:18,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:42:18,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 08:42:18,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:42:18,950 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 08:42:18,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:42:19,012 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 08:42:19,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960923783] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:42:19,012 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:42:19,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-15 08:42:19,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706659593] [2021-12-15 08:42:19,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:42:19,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-15 08:42:19,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:42:19,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-15 08:42:19,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-15 08:42:19,014 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:42:19,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:42:19,153 INFO L93 Difference]: Finished difference Result 121 states and 136 transitions. [2021-12-15 08:42:19,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-15 08:42:19,156 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-15 08:42:19,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:42:19,156 INFO L225 Difference]: With dead ends: 121 [2021-12-15 08:42:19,156 INFO L226 Difference]: Without dead ends: 72 [2021-12-15 08:42:19,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-12-15 08:42:19,158 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 105 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:42:19,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 35 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:42:19,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-15 08:42:19,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 56. [2021-12-15 08:42:19,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 55 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) [2021-12-15 08:42:19,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2021-12-15 08:42:19,165 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 37 [2021-12-15 08:42:19,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:42:19,166 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2021-12-15 08:42:19,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:42:19,166 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2021-12-15 08:42:19,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-15 08:42:19,167 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:42:19,167 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:42:19,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-15 08:42:19,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:42:19,371 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:42:19,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:42:19,372 INFO L85 PathProgramCache]: Analyzing trace with hash -192826428, now seen corresponding path program 5 times [2021-12-15 08:42:19,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:42:19,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219793535] [2021-12-15 08:42:19,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:42:19,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:42:19,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:42:19,439 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 08:42:19,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:42:19,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219793535] [2021-12-15 08:42:19,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219793535] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:42:19,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885177459] [2021-12-15 08:42:19,440 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 08:42:19,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:42:19,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:42:19,442 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) [2021-12-15 08:42:19,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 08:42:19,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-15 08:42:19,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:42:19,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 08:42:19,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:42:19,625 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 08:42:19,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:42:19,706 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 08:42:19,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885177459] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:42:19,706 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:42:19,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-15 08:42:19,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130590233] [2021-12-15 08:42:19,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:42:19,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-15 08:42:19,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:42:19,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-15 08:42:19,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-15 08:42:19,708 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:42:19,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:42:19,883 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2021-12-15 08:42:19,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 08:42:19,884 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-15 08:42:19,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:42:19,884 INFO L225 Difference]: With dead ends: 66 [2021-12-15 08:42:19,884 INFO L226 Difference]: Without dead ends: 50 [2021-12-15 08:42:19,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-12-15 08:42:19,885 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 50 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:42:19,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 22 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:42:19,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-15 08:42:19,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2021-12-15 08:42:19,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:42:19,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-12-15 08:42:19,889 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 39 [2021-12-15 08:42:19,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:42:19,889 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-12-15 08:42:19,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:42:19,890 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-12-15 08:42:19,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-15 08:42:19,891 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:42:19,891 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:42:19,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 08:42:20,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:42:20,100 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:42:20,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:42:20,100 INFO L85 PathProgramCache]: Analyzing trace with hash -604138262, now seen corresponding path program 6 times [2021-12-15 08:42:20,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:42:20,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938738553] [2021-12-15 08:42:20,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:42:20,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:42:20,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:42:21,840 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:42:21,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:42:21,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938738553] [2021-12-15 08:42:21,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938738553] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:42:21,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891879390] [2021-12-15 08:42:21,840 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 08:42:21,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:42:21,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:42:21,841 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) [2021-12-15 08:42:21,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 08:42:21,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-15 08:42:21,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:42:21,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-15 08:42:21,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:42:23,103 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 08:42:23,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:42:24,815 INFO L354 Elim1Store]: treesize reduction 114, result has 46.0 percent of original size [2021-12-15 08:42:24,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 108 [2021-12-15 08:42:25,092 INFO L354 Elim1Store]: treesize reduction 198, result has 6.2 percent of original size [2021-12-15 08:42:25,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 23 [2021-12-15 08:42:25,181 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 08:42:25,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891879390] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:42:25,182 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:42:25,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 27, 26] total 82 [2021-12-15 08:42:25,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772619867] [2021-12-15 08:42:25,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:42:25,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-12-15 08:42:25,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:42:25,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-12-15 08:42:25,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=6361, Unknown=0, NotChecked=0, Total=6642 [2021-12-15 08:42:25,185 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 82 states, 82 states have (on average 1.4146341463414633) internal successors, (116), 82 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) [2021-12-15 08:42:29,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:42:29,779 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2021-12-15 08:42:29,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-15 08:42:29,780 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.4146341463414633) internal successors, (116), 82 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) Word has length 45 [2021-12-15 08:42:29,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:42:29,780 INFO L225 Difference]: With dead ends: 80 [2021-12-15 08:42:29,781 INFO L226 Difference]: Without dead ends: 76 [2021-12-15 08:42:29,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3056 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=636, Invalid=13170, Unknown=0, NotChecked=0, Total=13806 [2021-12-15 08:42:29,784 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 19 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 2314 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 2416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-15 08:42:29,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 165 Invalid, 2416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2314 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-15 08:42:29,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-15 08:42:29,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2021-12-15 08:42:29,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.121212121212121) internal successors, (74), 66 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:42:29,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2021-12-15 08:42:29,792 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 45 [2021-12-15 08:42:29,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:42:29,792 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2021-12-15 08:42:29,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.4146341463414633) internal successors, (116), 82 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) [2021-12-15 08:42:29,792 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2021-12-15 08:42:29,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-15 08:42:29,793 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:42:29,794 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:42:29,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 08:42:30,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:42:30,007 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:42:30,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:42:30,007 INFO L85 PathProgramCache]: Analyzing trace with hash -703050612, now seen corresponding path program 7 times [2021-12-15 08:42:30,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:42:30,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635678609] [2021-12-15 08:42:30,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:42:30,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:42:30,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:42:30,103 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-15 08:42:30,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:42:30,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635678609] [2021-12-15 08:42:30,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635678609] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:42:30,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3875530] [2021-12-15 08:42:30,104 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 08:42:30,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:42:30,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:42:30,108 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) [2021-12-15 08:42:30,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 08:42:30,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:42:30,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-15 08:42:30,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:42:30,348 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-15 08:42:30,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:42:30,430 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-15 08:42:30,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3875530] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:42:30,430 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:42:30,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-15 08:42:30,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691758803] [2021-12-15 08:42:30,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:42:30,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-15 08:42:30,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:42:30,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-15 08:42:30,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-15 08:42:30,432 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:42:30,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:42:30,617 INFO L93 Difference]: Finished difference Result 149 states and 164 transitions. [2021-12-15 08:42:30,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-15 08:42:30,617 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-12-15 08:42:30,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:42:30,618 INFO L225 Difference]: With dead ends: 149 [2021-12-15 08:42:30,618 INFO L226 Difference]: Without dead ends: 86 [2021-12-15 08:42:30,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-12-15 08:42:30,619 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 137 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:42:30,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 28 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:42:30,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-15 08:42:30,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 70. [2021-12-15 08:42:30,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 69 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:42:30,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2021-12-15 08:42:30,628 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 47 [2021-12-15 08:42:30,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:42:30,629 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2021-12-15 08:42:30,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:42:30,629 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2021-12-15 08:42:30,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-15 08:42:30,630 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:42:30,630 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:42:30,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-15 08:42:30,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:42:30,840 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:42:30,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:42:30,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1992374766, now seen corresponding path program 8 times [2021-12-15 08:42:30,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:42:30,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971667702] [2021-12-15 08:42:30,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:42:30,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:42:30,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:42:30,912 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-15 08:42:30,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:42:30,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971667702] [2021-12-15 08:42:30,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971667702] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:42:30,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665745389] [2021-12-15 08:42:30,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 08:42:30,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:42:30,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:42:30,914 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) [2021-12-15 08:42:30,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 08:42:30,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 08:42:30,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:42:30,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-15 08:42:30,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:42:31,108 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-15 08:42:31,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:42:31,198 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-15 08:42:31,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665745389] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:42:31,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:42:31,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-15 08:42:31,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385263232] [2021-12-15 08:42:31,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:42:31,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-15 08:42:31,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:42:31,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-15 08:42:31,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-15 08:42:31,201 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:42:31,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:42:31,404 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2021-12-15 08:42:31,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-15 08:42:31,405 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-12-15 08:42:31,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:42:31,405 INFO L225 Difference]: With dead ends: 80 [2021-12-15 08:42:31,405 INFO L226 Difference]: Without dead ends: 60 [2021-12-15 08:42:31,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-12-15 08:42:31,406 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 101 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:42:31,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 22 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:42:31,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-15 08:42:31,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2021-12-15 08:42:31,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:42:31,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-12-15 08:42:31,411 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 49 [2021-12-15 08:42:31,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:42:31,411 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-12-15 08:42:31,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:42:31,412 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-12-15 08:42:31,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-15 08:42:31,412 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:42:31,412 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:42:31,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-15 08:42:31,612 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,SelfDestructingSolverStorable10 [2021-12-15 08:42:31,613 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:42:31,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:42:31,613 INFO L85 PathProgramCache]: Analyzing trace with hash -2047700076, now seen corresponding path program 9 times [2021-12-15 08:42:31,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:42:31,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6015018] [2021-12-15 08:42:31,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:42:31,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:42:31,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:42:33,966 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 1 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:42:33,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:42:33,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6015018] [2021-12-15 08:42:33,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6015018] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:42:33,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827342252] [2021-12-15 08:42:33,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 08:42:33,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:42:33,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:42:33,967 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) [2021-12-15 08:42:33,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-15 08:42:34,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-15 08:42:34,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:42:34,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-15 08:42:34,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:42:34,107 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 [2021-12-15 08:42:38,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:42:38,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:42:38,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:42:38,648 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 08:42:38,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 51 [2021-12-15 08:42:38,992 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 5 proven. 71 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 08:42:38,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:42:48,525 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 08:42:48,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827342252] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:42:48,526 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:42:48,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 40, 36] total 114 [2021-12-15 08:42:48,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642081352] [2021-12-15 08:42:48,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:42:48,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2021-12-15 08:42:48,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:42:48,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-12-15 08:42:48,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=653, Invalid=12228, Unknown=1, NotChecked=0, Total=12882 [2021-12-15 08:42:48,531 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 114 states, 114 states have (on average 1.3070175438596492) internal successors, (149), 114 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:42:55,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:42:55,293 INFO L93 Difference]: Finished difference Result 93 states and 100 transitions. [2021-12-15 08:42:55,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-15 08:42:55,293 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 1.3070175438596492) internal successors, (149), 114 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-15 08:42:55,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:42:55,294 INFO L225 Difference]: With dead ends: 93 [2021-12-15 08:42:55,294 INFO L226 Difference]: Without dead ends: 89 [2021-12-15 08:42:55,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 36 SyntacticMatches, 7 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6605 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=1437, Invalid=25952, Unknown=1, NotChecked=0, Total=27390 [2021-12-15 08:42:55,299 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 28 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 1989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1232 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 08:42:55,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 182 Invalid, 1989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 670 Invalid, 0 Unknown, 1232 Unchecked, 0.4s Time] [2021-12-15 08:42:55,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-15 08:42:55,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 81. [2021-12-15 08:42:55,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:42:55,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2021-12-15 08:42:55,307 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 55 [2021-12-15 08:42:55,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:42:55,308 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2021-12-15 08:42:55,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 1.3070175438596492) internal successors, (149), 114 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:42:55,308 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2021-12-15 08:42:55,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-15 08:42:55,309 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:42:55,309 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:42:55,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-15 08:42:55,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:42:55,523 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:42:55,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:42:55,524 INFO L85 PathProgramCache]: Analyzing trace with hash -691517258, now seen corresponding path program 10 times [2021-12-15 08:42:55,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:42:55,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840219459] [2021-12-15 08:42:55,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:42:55,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:42:55,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:42:55,630 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-15 08:42:55,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:42:55,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840219459] [2021-12-15 08:42:55,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840219459] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:42:55,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175771299] [2021-12-15 08:42:55,631 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 08:42:55,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:42:55,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:42:55,632 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) [2021-12-15 08:42:55,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-15 08:42:55,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 08:42:55,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:42:55,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-15 08:42:55,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:42:55,894 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-15 08:42:55,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:42:55,996 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-15 08:42:55,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175771299] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:42:55,997 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:42:55,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-12-15 08:42:55,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039266186] [2021-12-15 08:42:55,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:42:55,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-15 08:42:55,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:42:55,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-15 08:42:55,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-12-15 08:42:55,998 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:42:56,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:42:56,224 INFO L93 Difference]: Finished difference Result 177 states and 192 transitions. [2021-12-15 08:42:56,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-15 08:42:56,224 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-12-15 08:42:56,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:42:56,225 INFO L225 Difference]: With dead ends: 177 [2021-12-15 08:42:56,225 INFO L226 Difference]: Without dead ends: 100 [2021-12-15 08:42:56,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-12-15 08:42:56,226 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 213 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 08:42:56,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 33 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 08:42:56,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-15 08:42:56,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 84. [2021-12-15 08:42:56,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0843373493975903) internal successors, (90), 83 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:42:56,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2021-12-15 08:42:56,233 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 57 [2021-12-15 08:42:56,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:42:56,233 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2021-12-15 08:42:56,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:42:56,233 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2021-12-15 08:42:56,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-15 08:42:56,234 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:42:56,234 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:42:56,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-15 08:42:56,447 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,SelfDestructingSolverStorable12 [2021-12-15 08:42:56,447 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:42:56,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:42:56,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1701588072, now seen corresponding path program 11 times [2021-12-15 08:42:56,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:42:56,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328262550] [2021-12-15 08:42:56,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:42:56,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:42:56,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:42:56,559 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-15 08:42:56,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:42:56,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328262550] [2021-12-15 08:42:56,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328262550] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:42:56,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152011467] [2021-12-15 08:42:56,560 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 08:42:56,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:42:56,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:42:56,561 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) [2021-12-15 08:42:56,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-15 08:42:56,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-15 08:42:56,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:42:56,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-15 08:42:56,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:42:56,809 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-15 08:42:56,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:42:56,907 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-15 08:42:56,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152011467] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:42:56,907 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:42:56,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-12-15 08:42:56,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696289432] [2021-12-15 08:42:56,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:42:56,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-15 08:42:56,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:42:56,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-15 08:42:56,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-12-15 08:42:56,909 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:42:57,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:42:57,156 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2021-12-15 08:42:57,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-15 08:42:57,157 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 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 [2021-12-15 08:42:57,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:42:57,157 INFO L225 Difference]: With dead ends: 94 [2021-12-15 08:42:57,157 INFO L226 Difference]: Without dead ends: 70 [2021-12-15 08:42:57,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2021-12-15 08:42:57,158 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 153 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 08:42:57,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 26 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 08:42:57,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-15 08:42:57,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2021-12-15 08:42:57,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:42:57,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2021-12-15 08:42:57,163 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 59 [2021-12-15 08:42:57,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:42:57,163 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2021-12-15 08:42:57,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:42:57,164 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2021-12-15 08:42:57,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-15 08:42:57,164 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:42:57,165 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:42:57,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-15 08:42:57,367 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,SelfDestructingSolverStorable13 [2021-12-15 08:42:57,367 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:42:57,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:42:57,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1079638594, now seen corresponding path program 12 times [2021-12-15 08:42:57,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:42:57,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193767395] [2021-12-15 08:42:57,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:42:57,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:42:57,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:43:00,676 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 4 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:43:00,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:43:00,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193767395] [2021-12-15 08:43:00,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193767395] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:43:00,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496042882] [2021-12-15 08:43:00,677 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 08:43:00,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:43:00,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:43:00,678 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) [2021-12-15 08:43:00,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-15 08:43:00,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-15 08:43:00,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:43:00,739 WARN L261 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 104 conjunts are in the unsatisfiable core [2021-12-15 08:43:00,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:43:00,892 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