./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum_const_m5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-crafted/zero_sum_const_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 1ea5dd3dcdb2ca45816b1054e161d4e883537a3d70de7c4c731596cc44c337d4 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 00:00:01,208 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 00:00:01,209 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 00:00:01,232 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 00:00:01,232 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 00:00:01,233 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 00:00:01,234 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 00:00:01,235 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 00:00:01,241 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 00:00:01,242 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 00:00:01,243 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 00:00:01,246 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 00:00:01,247 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 00:00:01,255 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 00:00:01,258 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 00:00:01,259 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 00:00:01,260 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 00:00:01,261 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 00:00:01,266 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 00:00:01,270 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 00:00:01,271 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 00:00:01,272 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 00:00:01,274 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 00:00:01,275 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 00:00:01,280 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 00:00:01,283 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 00:00:01,283 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 00:00:01,284 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 00:00:01,285 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 00:00:01,285 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 00:00:01,285 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 00:00:01,286 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 00:00:01,287 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 00:00:01,288 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 00:00:01,289 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 00:00:01,289 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 00:00:01,290 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 00:00:01,290 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 00:00:01,290 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 00:00:01,291 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 00:00:01,291 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 00:00:01,292 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 00:00:01,307 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 00:00:01,308 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 00:00:01,308 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 00:00:01,308 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 00:00:01,309 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 00:00:01,309 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 00:00:01,310 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 00:00:01,310 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 00:00:01,310 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 00:00:01,310 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 00:00:01,311 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 00:00:01,311 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 00:00:01,311 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 00:00:01,311 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 00:00:01,312 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 00:00:01,312 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 00:00:01,312 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 00:00:01,312 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 00:00:01,312 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 00:00:01,312 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 00:00:01,312 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 00:00:01,313 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 00:00:01,313 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 00:00:01,313 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 00:00:01,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 00:00:01,313 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 00:00:01,313 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 00:00:01,315 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 00:00:01,315 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 00:00:01,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 00:00:01,315 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 00:00:01,315 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 00:00:01,315 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 00:00:01,316 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 00:00:01,316 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ea5dd3dcdb2ca45816b1054e161d4e883537a3d70de7c4c731596cc44c337d4 [2021-12-17 00:00:01,604 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 00:00:01,622 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 00:00:01,624 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 00:00:01,625 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 00:00:01,625 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 00:00:01,626 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_const_m5.c [2021-12-17 00:00:01,674 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f027a531a/d728809b599c470ab6941d5f0abad6b9/FLAG893a84326 [2021-12-17 00:00:02,058 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 00:00:02,059 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const_m5.c [2021-12-17 00:00:02,063 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f027a531a/d728809b599c470ab6941d5f0abad6b9/FLAG893a84326 [2021-12-17 00:00:02,087 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f027a531a/d728809b599c470ab6941d5f0abad6b9 [2021-12-17 00:00:02,089 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 00:00:02,090 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 00:00:02,091 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 00:00:02,091 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 00:00:02,093 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 00:00:02,094 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 12:00:02" (1/1) ... [2021-12-17 00:00:02,095 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f53e91d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:00:02, skipping insertion in model container [2021-12-17 00:00:02,095 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 12:00:02" (1/1) ... [2021-12-17 00:00:02,100 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 00:00:02,112 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 00:00:02,234 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_m5.c[408,421] [2021-12-17 00:00:02,271 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 00:00:02,281 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 00:00:02,290 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_m5.c[408,421] [2021-12-17 00:00:02,303 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 00:00:02,312 INFO L208 MainTranslator]: Completed translation [2021-12-17 00:00:02,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:00:02 WrapperNode [2021-12-17 00:00:02,314 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 00:00:02,315 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 00:00:02,315 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 00:00:02,315 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 00:00:02,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:00:02" (1/1) ... [2021-12-17 00:00:02,333 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:00:02" (1/1) ... [2021-12-17 00:00:02,357 INFO L137 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 148 [2021-12-17 00:00:02,358 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 00:00:02,358 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 00:00:02,359 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 00:00:02,359 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 00:00:02,364 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:00:02" (1/1) ... [2021-12-17 00:00:02,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:00:02" (1/1) ... [2021-12-17 00:00:02,370 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:00:02" (1/1) ... [2021-12-17 00:00:02,370 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:00:02" (1/1) ... [2021-12-17 00:00:02,373 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:00:02" (1/1) ... [2021-12-17 00:00:02,377 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:00:02" (1/1) ... [2021-12-17 00:00:02,378 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:00:02" (1/1) ... [2021-12-17 00:00:02,379 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 00:00:02,380 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 00:00:02,380 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 00:00:02,380 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 00:00:02,396 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:00:02" (1/1) ... [2021-12-17 00:00:02,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 00:00:02,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:00:02,423 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) [2021-12-17 00:00:02,425 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 [2021-12-17 00:00:02,449 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 00:00:02,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 00:00:02,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 00:00:02,449 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-17 00:00:02,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 00:00:02,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 00:00:02,450 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 00:00:02,534 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 00:00:02,535 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 00:00:02,751 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 00:00:02,756 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 00:00:02,756 INFO L301 CfgBuilder]: Removed 11 assume(true) statements. [2021-12-17 00:00:02,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:00:02 BoogieIcfgContainer [2021-12-17 00:00:02,758 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 00:00:02,759 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 00:00:02,759 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 00:00:02,761 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 00:00:02,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 12:00:02" (1/3) ... [2021-12-17 00:00:02,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14b6526f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 12:00:02, skipping insertion in model container [2021-12-17 00:00:02,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:00:02" (2/3) ... [2021-12-17 00:00:02,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14b6526f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 12:00:02, skipping insertion in model container [2021-12-17 00:00:02,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:00:02" (3/3) ... [2021-12-17 00:00:02,763 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m5.c [2021-12-17 00:00:02,766 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 00:00:02,767 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 00:00:02,807 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 00:00:02,814 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 [2021-12-17 00:00:02,815 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 00:00:02,827 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) [2021-12-17 00:00:02,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-17 00:00:02,836 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:00:02,836 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] [2021-12-17 00:00:02,837 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:00:02,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:00:02,841 INFO L85 PathProgramCache]: Analyzing trace with hash 226651140, now seen corresponding path program 1 times [2021-12-17 00:00:02,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:00:02,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040604544] [2021-12-17 00:00:02,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:00:02,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:00:02,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:00:02,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:00:02,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:00:02,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040604544] [2021-12-17 00:00:02,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040604544] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:00:02,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:00:02,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 00:00:02,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434434941] [2021-12-17 00:00:02,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:00:02,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 00:00:02,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:00:02,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 00:00:02,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 00:00:02,990 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) [2021-12-17 00:00:03,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:00:03,034 INFO L93 Difference]: Finished difference Result 83 states and 126 transitions. [2021-12-17 00:00:03,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 00:00:03,036 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 [2021-12-17 00:00:03,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:00:03,041 INFO L225 Difference]: With dead ends: 83 [2021-12-17 00:00:03,042 INFO L226 Difference]: Without dead ends: 39 [2021-12-17 00:00:03,044 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 [2021-12-17 00:00:03,049 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 [2021-12-17 00:00:03,050 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] [2021-12-17 00:00:03,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-17 00:00:03,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-12-17 00:00:03,072 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) [2021-12-17 00:00:03,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2021-12-17 00:00:03,074 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 27 [2021-12-17 00:00:03,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:00:03,074 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2021-12-17 00:00:03,075 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) [2021-12-17 00:00:03,075 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2021-12-17 00:00:03,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-17 00:00:03,075 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:00:03,076 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] [2021-12-17 00:00:03,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 00:00:03,076 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:00:03,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:00:03,077 INFO L85 PathProgramCache]: Analyzing trace with hash -833651044, now seen corresponding path program 1 times [2021-12-17 00:00:03,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:00:03,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439618808] [2021-12-17 00:00:03,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:00:03,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:00:03,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:00:03,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:00:03,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:00:03,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439618808] [2021-12-17 00:00:03,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439618808] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:00:03,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:00:03,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 00:00:03,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737423343] [2021-12-17 00:00:03,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:00:03,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 00:00:03,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:00:03,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 00:00:03,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 00:00:03,154 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) [2021-12-17 00:00:03,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:00:03,221 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2021-12-17 00:00:03,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 00:00:03,222 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 [2021-12-17 00:00:03,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:00:03,223 INFO L225 Difference]: With dead ends: 75 [2021-12-17 00:00:03,223 INFO L226 Difference]: Without dead ends: 41 [2021-12-17 00:00:03,228 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 [2021-12-17 00:00:03,229 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:00:03,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 50 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 00:00:03,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-17 00:00:03,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2021-12-17 00:00:03,238 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) [2021-12-17 00:00:03,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2021-12-17 00:00:03,240 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 27 [2021-12-17 00:00:03,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:00:03,241 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2021-12-17 00:00:03,241 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) [2021-12-17 00:00:03,242 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2021-12-17 00:00:03,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-17 00:00:03,248 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:00:03,248 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] [2021-12-17 00:00:03,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 00:00:03,249 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:00:03,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:00:03,250 INFO L85 PathProgramCache]: Analyzing trace with hash 479992254, now seen corresponding path program 1 times [2021-12-17 00:00:03,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:00:03,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202798515] [2021-12-17 00:00:03,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:00:03,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:00:03,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:00:03,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 00:00:03,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:00:03,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202798515] [2021-12-17 00:00:03,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202798515] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:00:03,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:00:03,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 00:00:03,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163007040] [2021-12-17 00:00:03,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:00:03,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 00:00:03,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:00:03,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 00:00:03,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 00:00:03,326 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) [2021-12-17 00:00:03,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:00:03,446 INFO L93 Difference]: Finished difference Result 92 states and 120 transitions. [2021-12-17 00:00:03,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 00:00:03,447 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 [2021-12-17 00:00:03,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:00:03,448 INFO L225 Difference]: With dead ends: 92 [2021-12-17 00:00:03,449 INFO L226 Difference]: Without dead ends: 61 [2021-12-17 00:00:03,449 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 [2021-12-17 00:00:03,450 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 64 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:00:03,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 19 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 00:00:03,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-17 00:00:03,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2021-12-17 00:00:03,458 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) [2021-12-17 00:00:03,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2021-12-17 00:00:03,460 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 29 [2021-12-17 00:00:03,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:00:03,460 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2021-12-17 00:00:03,460 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) [2021-12-17 00:00:03,460 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2021-12-17 00:00:03,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-17 00:00:03,462 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:00:03,462 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] [2021-12-17 00:00:03,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 00:00:03,462 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:00:03,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:00:03,463 INFO L85 PathProgramCache]: Analyzing trace with hash -509099182, now seen corresponding path program 1 times [2021-12-17 00:00:03,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:00:03,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45640476] [2021-12-17 00:00:03,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:00:03,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:00:03,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:00:03,551 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-17 00:00:03,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:00:03,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45640476] [2021-12-17 00:00:03,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45640476] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:00:03,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557218191] [2021-12-17 00:00:03,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:00:03,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:00:03,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:00:03,557 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) [2021-12-17 00:00:03,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 00:00:03,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:00:03,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 00:00:03,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:00:03,759 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-17 00:00:03,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:00:03,899 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-17 00:00:03,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557218191] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:00:03,900 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:00:03,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-17 00:00:03,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759432311] [2021-12-17 00:00:03,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:00:03,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 00:00:03,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:00:03,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 00:00:03,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-12-17 00:00:03,903 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) [2021-12-17 00:00:04,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:00:04,003 INFO L93 Difference]: Finished difference Result 97 states and 117 transitions. [2021-12-17 00:00:04,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 00:00:04,004 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 [2021-12-17 00:00:04,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:00:04,004 INFO L225 Difference]: With dead ends: 97 [2021-12-17 00:00:04,004 INFO L226 Difference]: Without dead ends: 53 [2021-12-17 00:00:04,005 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 [2021-12-17 00:00:04,005 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:00:04,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 49 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 00:00:04,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-17 00:00:04,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2021-12-17 00:00:04,010 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) [2021-12-17 00:00:04,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2021-12-17 00:00:04,011 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 49 [2021-12-17 00:00:04,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:00:04,011 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2021-12-17 00:00:04,012 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) [2021-12-17 00:00:04,012 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2021-12-17 00:00:04,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-17 00:00:04,012 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:00:04,013 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] [2021-12-17 00:00:04,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 00:00:04,231 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 [2021-12-17 00:00:04,231 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:00:04,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:00:04,232 INFO L85 PathProgramCache]: Analyzing trace with hash 290748660, now seen corresponding path program 2 times [2021-12-17 00:00:04,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:00:04,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918708404] [2021-12-17 00:00:04,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:00:04,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:00:04,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:00:04,308 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 00:00:04,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:00:04,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918708404] [2021-12-17 00:00:04,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918708404] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:00:04,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383410354] [2021-12-17 00:00:04,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:00:04,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:00:04,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:00:04,311 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) [2021-12-17 00:00:04,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 00:00:04,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 00:00:04,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:00:04,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 00:00:04,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:00:04,490 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 00:00:04,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:00:04,579 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 00:00:04,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383410354] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:00:04,580 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:00:04,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-12-17 00:00:04,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250011918] [2021-12-17 00:00:04,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:00:04,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 00:00:04,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:00:04,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 00:00:04,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-12-17 00:00:04,582 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) [2021-12-17 00:00:04,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:00:04,720 INFO L93 Difference]: Finished difference Result 123 states and 151 transitions. [2021-12-17 00:00:04,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 00:00:04,720 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 [2021-12-17 00:00:04,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:00:04,721 INFO L225 Difference]: With dead ends: 123 [2021-12-17 00:00:04,721 INFO L226 Difference]: Without dead ends: 83 [2021-12-17 00:00:04,721 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 [2021-12-17 00:00:04,722 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 53 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:00:04,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 22 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 00:00:04,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-17 00:00:04,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2021-12-17 00:00:04,726 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) [2021-12-17 00:00:04,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2021-12-17 00:00:04,727 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 51 [2021-12-17 00:00:04,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:00:04,727 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2021-12-17 00:00:04,728 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) [2021-12-17 00:00:04,728 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2021-12-17 00:00:04,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-17 00:00:04,728 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:00:04,729 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] [2021-12-17 00:00:04,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 00:00:04,948 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 [2021-12-17 00:00:04,948 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:00:04,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:00:04,948 INFO L85 PathProgramCache]: Analyzing trace with hash -813057144, now seen corresponding path program 3 times [2021-12-17 00:00:04,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:00:04,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332953758] [2021-12-17 00:00:04,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:00:04,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:00:05,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:00:07,225 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:00:07,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:00:07,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332953758] [2021-12-17 00:00:07,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332953758] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:00:07,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861374862] [2021-12-17 00:00:07,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 00:00:07,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:00:07,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:00:07,244 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) [2021-12-17 00:00:07,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 00:00:07,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-17 00:00:07,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:00:07,382 WARN L261 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 103 conjunts are in the unsatisfiable core [2021-12-17 00:00:07,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:00:07,534 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 [2021-12-17 00:00:29,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:00:29,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:00:29,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:00:29,845 INFO L354 Elim1Store]: treesize reduction 9, result has 52.6 percent of original size [2021-12-17 00:00:29,846 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 30 treesize of output 18 [2021-12-17 00:00:30,039 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:00:30,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:01:39,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 118 [2021-12-17 00:01:39,514 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 00:01:39,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1286 treesize of output 1025 [2021-12-17 00:04:57,168 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:04:57,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861374862] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:04:57,169 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:04:57,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 59, 57] total 153 [2021-12-17 00:04:57,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028161511] [2021-12-17 00:04:57,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:04:57,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2021-12-17 00:04:57,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:04:57,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2021-12-17 00:04:57,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1047, Invalid=22198, Unknown=11, NotChecked=0, Total=23256 [2021-12-17 00:04:57,178 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 153 states, 153 states have (on average 1.3137254901960784) internal successors, (201), 153 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:05:56,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:05:56,237 INFO L93 Difference]: Finished difference Result 260 states and 301 transitions. [2021-12-17 00:05:56,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2021-12-17 00:05:56,237 INFO L78 Accepts]: Start accepts. Automaton has has 153 states, 153 states have (on average 1.3137254901960784) internal successors, (201), 153 states have internal predecessors, (201), 0 states have call successors, (0), 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 71 [2021-12-17 00:05:56,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:05:56,240 INFO L225 Difference]: With dead ends: 260 [2021-12-17 00:05:56,240 INFO L226 Difference]: Without dead ends: 254 [2021-12-17 00:05:56,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 32 SyntacticMatches, 29 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16177 ImplicationChecksByTransitivity, 137.5s TimeCoverageRelationStatistics Valid=2505, Invalid=62254, Unknown=11, NotChecked=0, Total=64770 [2021-12-17 00:05:56,254 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 79 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 1014 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 3491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2438 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 00:05:56,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 300 Invalid, 3491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1014 Invalid, 0 Unknown, 2438 Unchecked, 0.6s Time] [2021-12-17 00:05:56,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-12-17 00:05:56,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 135. [2021-12-17 00:05:56,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.171641791044776) internal successors, (157), 134 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:05:56,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 157 transitions. [2021-12-17 00:05:56,274 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 157 transitions. Word has length 71 [2021-12-17 00:05:56,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:05:56,275 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 157 transitions. [2021-12-17 00:05:56,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 153 states, 153 states have (on average 1.3137254901960784) internal successors, (201), 153 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:05:56,275 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 157 transitions. [2021-12-17 00:05:56,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-17 00:05:56,278 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:05:56,278 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-12-17 00:05:56,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 00:05:56,479 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 [2021-12-17 00:05:56,480 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:05:56,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:05:56,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1767165226, now seen corresponding path program 4 times [2021-12-17 00:05:56,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:05:56,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282085337] [2021-12-17 00:05:56,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:05:56,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:05:56,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:05:56,586 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 00:05:56,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:05:56,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282085337] [2021-12-17 00:05:56,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282085337] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:05:56,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355444521] [2021-12-17 00:05:56,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 00:05:56,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:05:56,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:05:56,604 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) [2021-12-17 00:05:56,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 00:05:56,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 00:05:56,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:05:56,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 00:05:56,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:05:56,810 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 00:05:56,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:05:56,923 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 00:05:56,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355444521] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:05:56,923 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:05:56,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-17 00:05:56,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034578681] [2021-12-17 00:05:56,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:05:56,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 00:05:56,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:05:56,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 00:05:56,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-17 00:05:56,925 INFO L87 Difference]: Start difference. First operand 135 states and 157 transitions. Second operand has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 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) [2021-12-17 00:05:57,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:05:57,245 INFO L93 Difference]: Finished difference Result 305 states and 354 transitions. [2021-12-17 00:05:57,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 00:05:57,245 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-12-17 00:05:57,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:05:57,246 INFO L225 Difference]: With dead ends: 305 [2021-12-17 00:05:57,246 INFO L226 Difference]: Without dead ends: 184 [2021-12-17 00:05:57,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-12-17 00:05:57,247 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 171 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 00:05:57,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 52 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 00:05:57,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-12-17 00:05:57,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 156. [2021-12-17 00:05:57,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.1419354838709677) internal successors, (177), 155 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:05:57,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 177 transitions. [2021-12-17 00:05:57,257 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 177 transitions. Word has length 73 [2021-12-17 00:05:57,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:05:57,257 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 177 transitions. [2021-12-17 00:05:57,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 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) [2021-12-17 00:05:57,257 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 177 transitions. [2021-12-17 00:05:57,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-17 00:05:57,258 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:05:57,258 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-12-17 00:05:57,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-17 00:05:57,458 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 [2021-12-17 00:05:57,459 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:05:57,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:05:57,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1072452492, now seen corresponding path program 5 times [2021-12-17 00:05:57,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:05:57,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309645098] [2021-12-17 00:05:57,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:05:57,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:05:57,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:05:57,525 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-17 00:05:57,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:05:57,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309645098] [2021-12-17 00:05:57,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309645098] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:05:57,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782157844] [2021-12-17 00:05:57,526 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 00:05:57,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:05:57,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:05:57,527 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) [2021-12-17 00:05:57,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 00:05:57,611 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-17 00:05:57,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:05:57,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 00:05:57,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:05:57,764 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-17 00:05:57,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:05:57,846 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-17 00:05:57,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782157844] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:05:57,846 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:05:57,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-17 00:05:57,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369063496] [2021-12-17 00:05:57,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:05:57,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 00:05:57,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:05:57,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 00:05:57,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-17 00:05:57,847 INFO L87 Difference]: Start difference. First operand 156 states and 177 transitions. Second operand has 14 states, 14 states have (on average 7.0) internal successors, (98), 14 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:05:58,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:05:58,045 INFO L93 Difference]: Finished difference Result 172 states and 193 transitions. [2021-12-17 00:05:58,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 00:05:58,046 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.0) internal successors, (98), 14 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-17 00:05:58,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:05:58,046 INFO L225 Difference]: With dead ends: 172 [2021-12-17 00:05:58,047 INFO L226 Difference]: Without dead ends: 114 [2021-12-17 00:05:58,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-12-17 00:05:58,047 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 140 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 00:05:58,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 28 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 00:05:58,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-17 00:05:58,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 94. [2021-12-17 00:05:58,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.118279569892473) internal successors, (104), 93 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:05:58,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2021-12-17 00:05:58,054 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 75 [2021-12-17 00:05:58,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:05:58,055 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2021-12-17 00:05:58,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.0) internal successors, (98), 14 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:05:58,056 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2021-12-17 00:05:58,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-17 00:05:58,056 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:05:58,056 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:05:58,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 00:05:58,262 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 [2021-12-17 00:05:58,263 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:05:58,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:05:58,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1413596990, now seen corresponding path program 6 times [2021-12-17 00:05:58,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:05:58,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995991112] [2021-12-17 00:05:58,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:05:58,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:05:58,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:06:04,853 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:06:04,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:06:04,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995991112] [2021-12-17 00:06:04,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995991112] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:06:04,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025909053] [2021-12-17 00:06:04,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 00:06:04,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:06:04,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:06:04,863 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) [2021-12-17 00:06:04,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 00:06:04,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-17 00:06:04,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:06:04,956 WARN L261 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 137 conjunts are in the unsatisfiable core [2021-12-17 00:06:04,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:06:25,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:06:25,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:06:25,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:06:25,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:06:25,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:06:25,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:06:25,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:06:25,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:06:25,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:06:25,122 INFO L354 Elim1Store]: treesize reduction 18, result has 51.4 percent of original size [2021-12-17 00:06:25,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 66 treesize of output 35 [2021-12-17 00:06:25,552 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:06:25,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:07:50,749 INFO L354 Elim1Store]: treesize reduction 245, result has 63.8 percent of original size [2021-12-17 00:07:50,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 188 treesize of output 469 Killed by 15