./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum_m5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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_m5.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 afdb8b285c2183da613babde617c7580c3aee6b3bc694b080468400e828cda16 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-27 21:38:12,090 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-27 21:38:12,092 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-27 21:38:12,110 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-27 21:38:12,110 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-27 21:38:12,117 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-27 21:38:12,119 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-27 21:38:12,121 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-27 21:38:12,122 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-27 21:38:12,123 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-27 21:38:12,124 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-27 21:38:12,125 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-27 21:38:12,130 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-27 21:38:12,132 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-27 21:38:12,133 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-27 21:38:12,134 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-27 21:38:12,136 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-27 21:38:12,139 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-27 21:38:12,140 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-27 21:38:12,143 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-27 21:38:12,146 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-27 21:38:12,149 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-27 21:38:12,150 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-27 21:38:12,151 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-27 21:38:12,153 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-27 21:38:12,155 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-27 21:38:12,155 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-27 21:38:12,156 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-27 21:38:12,157 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-27 21:38:12,157 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-27 21:38:12,158 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-27 21:38:12,158 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-27 21:38:12,159 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-27 21:38:12,160 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-27 21:38:12,160 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-27 21:38:12,161 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-27 21:38:12,162 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-27 21:38:12,162 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-27 21:38:12,162 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-27 21:38:12,163 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-27 21:38:12,164 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-27 21:38:12,164 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-27 21:38:12,191 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-27 21:38:12,191 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-27 21:38:12,192 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-27 21:38:12,192 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-27 21:38:12,193 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-27 21:38:12,193 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-27 21:38:12,194 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-27 21:38:12,195 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-27 21:38:12,195 INFO L138 SettingsManager]: * Use SBE=true [2021-12-27 21:38:12,195 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-27 21:38:12,196 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-27 21:38:12,196 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-27 21:38:12,196 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-27 21:38:12,196 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-27 21:38:12,196 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-27 21:38:12,197 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-27 21:38:12,197 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-27 21:38:12,197 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-27 21:38:12,197 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-27 21:38:12,197 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-27 21:38:12,197 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-27 21:38:12,198 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-27 21:38:12,198 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-27 21:38:12,198 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-27 21:38:12,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 21:38:12,198 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-27 21:38:12,199 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-27 21:38:12,199 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-27 21:38:12,199 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-27 21:38:12,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-27 21:38:12,199 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-27 21:38:12,199 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-27 21:38:12,200 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-27 21:38:12,200 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> afdb8b285c2183da613babde617c7580c3aee6b3bc694b080468400e828cda16 [2021-12-27 21:38:12,464 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-27 21:38:12,488 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-27 21:38:12,490 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-27 21:38:12,490 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-27 21:38:12,492 INFO L275 PluginConnector]: CDTParser initialized [2021-12-27 21:38:12,493 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_m5.c [2021-12-27 21:38:12,540 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e10e7d5a4/b40f11b2b3aa4ac5aa249223296ba665/FLAGb0122ed0d [2021-12-27 21:38:12,875 INFO L306 CDTParser]: Found 1 translation units. [2021-12-27 21:38:12,876 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_m5.c [2021-12-27 21:38:12,882 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e10e7d5a4/b40f11b2b3aa4ac5aa249223296ba665/FLAGb0122ed0d [2021-12-27 21:38:13,316 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e10e7d5a4/b40f11b2b3aa4ac5aa249223296ba665 [2021-12-27 21:38:13,318 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-27 21:38:13,320 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-27 21:38:13,322 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-27 21:38:13,322 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-27 21:38:13,324 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-27 21:38:13,325 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 09:38:13" (1/1) ... [2021-12-27 21:38:13,326 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f107673 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:38:13, skipping insertion in model container [2021-12-27 21:38:13,326 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 09:38:13" (1/1) ... [2021-12-27 21:38:13,334 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-27 21:38:13,348 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-27 21:38:13,437 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_m5.c[402,415] [2021-12-27 21:38:13,450 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 21:38:13,455 INFO L203 MainTranslator]: Completed pre-run [2021-12-27 21:38:13,462 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_m5.c[402,415] [2021-12-27 21:38:13,480 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 21:38:13,501 INFO L208 MainTranslator]: Completed translation [2021-12-27 21:38:13,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:38:13 WrapperNode [2021-12-27 21:38:13,502 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-27 21:38:13,503 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-27 21:38:13,503 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-27 21:38:13,504 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-27 21:38:13,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:38:13" (1/1) ... [2021-12-27 21:38:13,549 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:38:13" (1/1) ... [2021-12-27 21:38:13,576 INFO L137 Inliner]: procedures = 15, calls = 21, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 149 [2021-12-27 21:38:13,577 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-27 21:38:13,578 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-27 21:38:13,578 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-27 21:38:13,578 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-27 21:38:13,585 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:38:13" (1/1) ... [2021-12-27 21:38:13,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:38:13" (1/1) ... [2021-12-27 21:38:13,596 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:38:13" (1/1) ... [2021-12-27 21:38:13,596 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:38:13" (1/1) ... [2021-12-27 21:38:13,606 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:38:13" (1/1) ... [2021-12-27 21:38:13,611 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:38:13" (1/1) ... [2021-12-27 21:38:13,619 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:38:13" (1/1) ... [2021-12-27 21:38:13,622 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-27 21:38:13,628 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-27 21:38:13,628 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-27 21:38:13,628 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-27 21:38:13,629 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:38:13" (1/1) ... [2021-12-27 21:38:13,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 21:38:13,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:38:13,653 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) [2021-12-27 21:38:13,672 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 [2021-12-27 21:38:13,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-27 21:38:13,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-27 21:38:13,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-27 21:38:13,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-27 21:38:13,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-27 21:38:13,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-27 21:38:13,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-27 21:38:13,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-27 21:38:13,763 INFO L234 CfgBuilder]: Building ICFG [2021-12-27 21:38:13,764 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-27 21:38:13,923 INFO L275 CfgBuilder]: Performing block encoding [2021-12-27 21:38:13,928 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-27 21:38:13,947 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-12-27 21:38:13,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 09:38:13 BoogieIcfgContainer [2021-12-27 21:38:13,949 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-27 21:38:13,950 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-27 21:38:13,950 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-27 21:38:13,952 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-27 21:38:13,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 09:38:13" (1/3) ... [2021-12-27 21:38:13,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a0de57f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 09:38:13, skipping insertion in model container [2021-12-27 21:38:13,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:38:13" (2/3) ... [2021-12-27 21:38:13,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a0de57f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 09:38:13, skipping insertion in model container [2021-12-27 21:38:13,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 09:38:13" (3/3) ... [2021-12-27 21:38:13,958 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_m5.c [2021-12-27 21:38:13,962 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-27 21:38:13,962 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-27 21:38:13,995 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-27 21:38:14,000 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 [2021-12-27 21:38:14,001 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-27 21:38:14,014 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 43 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:38:14,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-27 21:38:14,019 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:38:14,020 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, 1, 1] [2021-12-27 21:38:14,020 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:38:14,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:38:14,025 INFO L85 PathProgramCache]: Analyzing trace with hash 226651140, now seen corresponding path program 1 times [2021-12-27 21:38:14,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:38:14,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45236660] [2021-12-27 21:38:14,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:38:14,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:38:14,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:38:14,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:38:14,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:38:14,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45236660] [2021-12-27 21:38:14,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45236660] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:38:14,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:38:14,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-27 21:38:14,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88209049] [2021-12-27 21:38:14,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:38:14,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-27 21:38:14,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:38:14,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-27 21:38:14,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-27 21:38:14,201 INFO L87 Difference]: Start difference. First operand has 44 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 43 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:38:14,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:38:14,230 INFO L93 Difference]: Finished difference Result 83 states and 126 transitions. [2021-12-27 21:38:14,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-27 21:38:14,232 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 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 [2021-12-27 21:38:14,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:38:14,239 INFO L225 Difference]: With dead ends: 83 [2021-12-27 21:38:14,239 INFO L226 Difference]: Without dead ends: 39 [2021-12-27 21:38:14,246 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 [2021-12-27 21:38:14,253 INFO L933 BasicCegarLoop]: 55 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, 55 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 [2021-12-27 21:38:14,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:38:14,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-27 21:38:14,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-12-27 21:38:14,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 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) [2021-12-27 21:38:14,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2021-12-27 21:38:14,300 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 27 [2021-12-27 21:38:14,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:38:14,301 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2021-12-27 21:38:14,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:38:14,301 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2021-12-27 21:38:14,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-27 21:38:14,303 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:38:14,304 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, 1, 1] [2021-12-27 21:38:14,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-27 21:38:14,305 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:38:14,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:38:14,315 INFO L85 PathProgramCache]: Analyzing trace with hash -833651044, now seen corresponding path program 1 times [2021-12-27 21:38:14,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:38:14,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422027994] [2021-12-27 21:38:14,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:38:14,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:38:14,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:38:14,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:38:14,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:38:14,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422027994] [2021-12-27 21:38:14,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422027994] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:38:14,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:38:14,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:38:14,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261022436] [2021-12-27 21:38:14,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:38:14,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:38:14,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:38:14,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:38:14,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:38:14,361 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:38:14,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:38:14,394 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2021-12-27 21:38:14,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:38:14,394 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 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 [2021-12-27 21:38:14,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:38:14,395 INFO L225 Difference]: With dead ends: 75 [2021-12-27 21:38:14,395 INFO L226 Difference]: Without dead ends: 41 [2021-12-27 21:38:14,395 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 [2021-12-27 21:38:14,396 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:38:14,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 70 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:38:14,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-27 21:38:14,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2021-12-27 21:38:14,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 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) [2021-12-27 21:38:14,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2021-12-27 21:38:14,401 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 27 [2021-12-27 21:38:14,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:38:14,401 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2021-12-27 21:38:14,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:38:14,402 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2021-12-27 21:38:14,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-27 21:38:14,402 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:38:14,402 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, 1, 1, 1, 1] [2021-12-27 21:38:14,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-27 21:38:14,403 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:38:14,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:38:14,403 INFO L85 PathProgramCache]: Analyzing trace with hash 479992254, now seen corresponding path program 1 times [2021-12-27 21:38:14,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:38:14,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290361569] [2021-12-27 21:38:14,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:38:14,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:38:14,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:38:14,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-27 21:38:14,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:38:14,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290361569] [2021-12-27 21:38:14,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290361569] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:38:14,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:38:14,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-27 21:38:14,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248794755] [2021-12-27 21:38:14,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:38:14,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-27 21:38:14,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:38:14,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-27 21:38:14,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-27 21:38:14,444 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:38:14,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:38:14,521 INFO L93 Difference]: Finished difference Result 91 states and 119 transitions. [2021-12-27 21:38:14,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-27 21:38:14,522 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-27 21:38:14,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:38:14,537 INFO L225 Difference]: With dead ends: 91 [2021-12-27 21:38:14,537 INFO L226 Difference]: Without dead ends: 60 [2021-12-27 21:38:14,537 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 [2021-12-27 21:38:14,542 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 63 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:38:14,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 21 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 21:38:14,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-27 21:38:14,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2021-12-27 21:38:14,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 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) [2021-12-27 21:38:14,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2021-12-27 21:38:14,557 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 29 [2021-12-27 21:38:14,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:38:14,557 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2021-12-27 21:38:14,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:38:14,557 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2021-12-27 21:38:14,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-27 21:38:14,559 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:38:14,559 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:38:14,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-27 21:38:14,559 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:38:14,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:38:14,560 INFO L85 PathProgramCache]: Analyzing trace with hash -509099182, now seen corresponding path program 1 times [2021-12-27 21:38:14,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:38:14,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014813962] [2021-12-27 21:38:14,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:38:14,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:38:14,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:38:14,622 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-27 21:38:14,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:38:14,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014813962] [2021-12-27 21:38:14,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014813962] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:38:14,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933367473] [2021-12-27 21:38:14,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:38:14,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:38:14,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:38:14,624 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) [2021-12-27 21:38:14,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-27 21:38:14,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:38:14,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-27 21:38:14,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:38:14,842 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-27 21:38:14,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:38:14,952 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-27 21:38:14,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933367473] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:38:14,953 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:38:14,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-27 21:38:14,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394763606] [2021-12-27 21:38:14,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:38:14,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-27 21:38:14,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:38:14,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-27 21:38:14,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-12-27 21:38:14,957 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:38:15,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:38:15,022 INFO L93 Difference]: Finished difference Result 97 states and 117 transitions. [2021-12-27 21:38:15,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-27 21:38:15,022 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-12-27 21:38:15,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:38:15,023 INFO L225 Difference]: With dead ends: 97 [2021-12-27 21:38:15,023 INFO L226 Difference]: Without dead ends: 53 [2021-12-27 21:38:15,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-12-27 21:38:15,029 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 2 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:38:15,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 116 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:38:15,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-27 21:38:15,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2021-12-27 21:38:15,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 51 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) [2021-12-27 21:38:15,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2021-12-27 21:38:15,040 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 49 [2021-12-27 21:38:15,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:38:15,041 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2021-12-27 21:38:15,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:38:15,041 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2021-12-27 21:38:15,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-27 21:38:15,044 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:38:15,044 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:38:15,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-27 21:38:15,259 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 [2021-12-27 21:38:15,260 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:38:15,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:38:15,260 INFO L85 PathProgramCache]: Analyzing trace with hash 290748660, now seen corresponding path program 2 times [2021-12-27 21:38:15,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:38:15,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136898523] [2021-12-27 21:38:15,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:38:15,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:38:15,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:38:15,329 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-27 21:38:15,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:38:15,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136898523] [2021-12-27 21:38:15,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136898523] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:38:15,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006545476] [2021-12-27 21:38:15,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-27 21:38:15,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:38:15,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:38:15,331 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) [2021-12-27 21:38:15,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-27 21:38:15,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-27 21:38:15,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:38:15,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-27 21:38:15,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:38:15,493 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-27 21:38:15,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:38:15,588 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-27 21:38:15,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006545476] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:38:15,589 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:38:15,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-12-27 21:38:15,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132461658] [2021-12-27 21:38:15,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:38:15,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-27 21:38:15,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:38:15,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-27 21:38:15,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-12-27 21:38:15,595 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:38:15,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:38:15,724 INFO L93 Difference]: Finished difference Result 122 states and 150 transitions. [2021-12-27 21:38:15,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-27 21:38:15,725 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-12-27 21:38:15,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:38:15,728 INFO L225 Difference]: With dead ends: 122 [2021-12-27 21:38:15,728 INFO L226 Difference]: Without dead ends: 82 [2021-12-27 21:38:15,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2021-12-27 21:38:15,729 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 36 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:38:15,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 33 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 21:38:15,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-27 21:38:15,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2021-12-27 21:38:15,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 71 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:38:15,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2021-12-27 21:38:15,742 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 51 [2021-12-27 21:38:15,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:38:15,742 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2021-12-27 21:38:15,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:38:15,743 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2021-12-27 21:38:15,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-27 21:38:15,743 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:38:15,743 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:38:15,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-27 21:38:15,947 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 [2021-12-27 21:38:15,948 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:38:15,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:38:15,948 INFO L85 PathProgramCache]: Analyzing trace with hash -813057144, now seen corresponding path program 3 times [2021-12-27 21:38:15,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:38:15,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561970111] [2021-12-27 21:38:15,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:38:15,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:38:16,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:38:18,344 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:38:18,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:38:18,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561970111] [2021-12-27 21:38:18,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561970111] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:38:18,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18906748] [2021-12-27 21:38:18,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-27 21:38:18,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:38:18,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:38:18,348 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) [2021-12-27 21:38:18,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-27 21:38:18,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-27 21:38:18,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:38:18,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 100 conjunts are in the unsatisfiable core [2021-12-27 21:38:18,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:38:29,082 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:38:29,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:38:58,923 INFO L353 Elim1Store]: treesize reduction 68, result has 67.8 percent of original size [2021-12-27 21:38:58,924 INFO L387 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 106 treesize of output 165 [2021-12-27 21:39:05,753 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:39:05,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18906748] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:39:05,754 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:39:05,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 56, 53] total 141 [2021-12-27 21:39:05,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329179229] [2021-12-27 21:39:05,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:39:05,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2021-12-27 21:39:05,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:39:05,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2021-12-27 21:39:05,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=833, Invalid=18903, Unknown=4, NotChecked=0, Total=19740 [2021-12-27 21:39:05,761 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 141 states, 141 states have (on average 1.3971631205673758) internal successors, (197), 141 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)