./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum_const4.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_const4.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 e61c61c9ffe0a2031cf5a0964b1882adcc5bdae1b7345aeaf1c374f155ad9e78 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 21:40:47,178 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 21:40:47,180 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 21:40:47,253 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 21:40:47,253 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 21:40:47,256 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 21:40:47,257 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 21:40:47,260 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 21:40:47,262 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 21:40:47,265 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 21:40:47,266 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 21:40:47,268 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 21:40:47,268 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 21:40:47,270 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 21:40:47,272 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 21:40:47,275 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 21:40:47,276 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 21:40:47,277 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 21:40:47,279 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 21:40:47,284 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 21:40:47,285 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 21:40:47,286 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 21:40:47,287 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 21:40:47,288 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 21:40:47,294 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 21:40:47,294 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 21:40:47,294 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 21:40:47,295 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 21:40:47,296 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 21:40:47,296 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 21:40:47,297 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 21:40:47,297 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 21:40:47,299 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 21:40:47,300 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 21:40:47,301 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 21:40:47,301 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 21:40:47,301 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 21:40:47,302 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 21:40:47,302 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 21:40:47,303 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 21:40:47,303 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 21:40:47,305 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 21:40:47,335 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 21:40:47,336 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 21:40:47,336 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 21:40:47,336 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 21:40:47,337 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 21:40:47,337 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 21:40:47,338 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 21:40:47,339 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 21:40:47,339 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 21:40:47,339 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 21:40:47,340 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 21:40:47,340 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 21:40:47,340 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 21:40:47,340 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 21:40:47,340 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 21:40:47,341 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 21:40:47,341 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 21:40:47,341 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 21:40:47,341 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 21:40:47,341 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 21:40:47,342 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 21:40:47,342 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 21:40:47,342 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 21:40:47,342 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 21:40:47,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 21:40:47,343 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 21:40:47,343 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 21:40:47,343 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 21:40:47,343 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 21:40:47,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 21:40:47,344 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 21:40:47,344 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 21:40:47,344 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 21:40:47,344 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 21:40:47,345 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e61c61c9ffe0a2031cf5a0964b1882adcc5bdae1b7345aeaf1c374f155ad9e78 [2021-12-15 21:40:47,554 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 21:40:47,573 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 21:40:47,575 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 21:40:47,576 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 21:40:47,577 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 21:40:47,578 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_const4.c [2021-12-15 21:40:47,630 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7f18b0ba/9bacbbae62284333a8a5185585cfa195/FLAG133b15e34 [2021-12-15 21:40:48,006 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 21:40:48,009 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const4.c [2021-12-15 21:40:48,019 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7f18b0ba/9bacbbae62284333a8a5185585cfa195/FLAG133b15e34 [2021-12-15 21:40:48,409 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7f18b0ba/9bacbbae62284333a8a5185585cfa195 [2021-12-15 21:40:48,412 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 21:40:48,413 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 21:40:48,415 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 21:40:48,415 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 21:40:48,418 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 21:40:48,419 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:40:48" (1/1) ... [2021-12-15 21:40:48,420 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b1a1ed5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:48, skipping insertion in model container [2021-12-15 21:40:48,421 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:40:48" (1/1) ... [2021-12-15 21:40:48,426 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 21:40:48,440 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 21:40:48,611 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_const4.c[406,419] [2021-12-15 21:40:48,650 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 21:40:48,656 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 21:40:48,668 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_const4.c[406,419] [2021-12-15 21:40:48,688 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 21:40:48,704 INFO L208 MainTranslator]: Completed translation [2021-12-15 21:40:48,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:48 WrapperNode [2021-12-15 21:40:48,705 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 21:40:48,706 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 21:40:48,706 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 21:40:48,706 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 21:40:48,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:48" (1/1) ... [2021-12-15 21:40:48,727 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:48" (1/1) ... [2021-12-15 21:40:48,750 INFO L137 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 126 [2021-12-15 21:40:48,751 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 21:40:48,752 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 21:40:48,752 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 21:40:48,752 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 21:40:48,759 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:48" (1/1) ... [2021-12-15 21:40:48,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:48" (1/1) ... [2021-12-15 21:40:48,763 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:48" (1/1) ... [2021-12-15 21:40:48,764 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:48" (1/1) ... [2021-12-15 21:40:48,780 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:48" (1/1) ... [2021-12-15 21:40:48,785 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:48" (1/1) ... [2021-12-15 21:40:48,790 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:48" (1/1) ... [2021-12-15 21:40:48,792 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 21:40:48,794 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 21:40:48,794 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 21:40:48,794 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 21:40:48,795 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:48" (1/1) ... [2021-12-15 21:40:48,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 21:40:48,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:40:48,824 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 21:40:48,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 21:40:48,864 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 21:40:48,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 21:40:48,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 21:40:48,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-15 21:40:48,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 21:40:48,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 21:40:48,865 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 21:40:48,953 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 21:40:48,954 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 21:40:49,131 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 21:40:49,136 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 21:40:49,136 INFO L301 CfgBuilder]: Removed 9 assume(true) statements. [2021-12-15 21:40:49,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:40:49 BoogieIcfgContainer [2021-12-15 21:40:49,138 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 21:40:49,139 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 21:40:49,139 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 21:40:49,142 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 21:40:49,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:40:48" (1/3) ... [2021-12-15 21:40:49,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ea056ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:40:49, skipping insertion in model container [2021-12-15 21:40:49,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:48" (2/3) ... [2021-12-15 21:40:49,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ea056ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:40:49, skipping insertion in model container [2021-12-15 21:40:49,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:40:49" (3/3) ... [2021-12-15 21:40:49,145 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const4.c [2021-12-15 21:40:49,148 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 21:40:49,149 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 21:40:49,193 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 21:40:49,202 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 21:40:49,202 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 21:40:49,214 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 37 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:49,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-15 21:40:49,221 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:40:49,222 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] [2021-12-15 21:40:49,223 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:40:49,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:40:49,227 INFO L85 PathProgramCache]: Analyzing trace with hash -2094998668, now seen corresponding path program 1 times [2021-12-15 21:40:49,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:40:49,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395555931] [2021-12-15 21:40:49,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:40:49,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:40:49,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:40:49,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:40:49,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:40:49,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395555931] [2021-12-15 21:40:49,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395555931] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:40:49,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:40:49,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 21:40:49,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604315880] [2021-12-15 21:40:49,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:40:49,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 21:40:49,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:40:49,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 21:40:49,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 21:40:49,415 INFO L87 Difference]: Start difference. First operand has 38 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 37 states have internal predecessors, (57), 0 states have call successors, (0), 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 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:49,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:40:49,437 INFO L93 Difference]: Finished difference Result 71 states and 106 transitions. [2021-12-15 21:40:49,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 21:40:49,440 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-15 21:40:49,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:40:49,446 INFO L225 Difference]: With dead ends: 71 [2021-12-15 21:40:49,446 INFO L226 Difference]: Without dead ends: 33 [2021-12-15 21:40:49,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 21:40:49,452 INFO L933 BasicCegarLoop]: 47 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, 47 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:40:49,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:40:49,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-15 21:40:49,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-12-15 21:40:49,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:49,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2021-12-15 21:40:49,483 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 23 [2021-12-15 21:40:49,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:40:49,483 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2021-12-15 21:40:49,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:49,483 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2021-12-15 21:40:49,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-15 21:40:49,484 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:40:49,485 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] [2021-12-15 21:40:49,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 21:40:49,486 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:40:49,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:40:49,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1680934388, now seen corresponding path program 1 times [2021-12-15 21:40:49,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:40:49,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382945923] [2021-12-15 21:40:49,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:40:49,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:40:49,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:40:49,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:40:49,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:40:49,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382945923] [2021-12-15 21:40:49,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382945923] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:40:49,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:40:49,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 21:40:49,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652915506] [2021-12-15 21:40:49,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:40:49,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 21:40:49,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:40:49,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 21:40:49,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 21:40:49,579 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:49,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:40:49,648 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2021-12-15 21:40:49,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 21:40:49,649 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-15 21:40:49,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:40:49,651 INFO L225 Difference]: With dead ends: 63 [2021-12-15 21:40:49,651 INFO L226 Difference]: Without dead ends: 35 [2021-12-15 21:40:49,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 21:40:49,656 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:40:49,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 42 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:40:49,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-15 21:40:49,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-12-15 21:40:49,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:49,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2021-12-15 21:40:49,669 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 23 [2021-12-15 21:40:49,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:40:49,670 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2021-12-15 21:40:49,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:49,672 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2021-12-15 21:40:49,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-15 21:40:49,675 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:40:49,676 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:40:49,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 21:40:49,676 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:40:49,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:40:49,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1381660206, now seen corresponding path program 1 times [2021-12-15 21:40:49,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:40:49,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234392825] [2021-12-15 21:40:49,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:40:49,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:40:49,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:40:49,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 21:40:49,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:40:49,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234392825] [2021-12-15 21:40:49,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234392825] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:40:49,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:40:49,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 21:40:49,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672225416] [2021-12-15 21:40:49,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:40:49,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 21:40:49,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:40:49,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 21:40:49,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 21:40:49,770 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:49,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:40:49,862 INFO L93 Difference]: Finished difference Result 76 states and 98 transitions. [2021-12-15 21:40:49,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 21:40:49,863 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-15 21:40:49,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:40:49,864 INFO L225 Difference]: With dead ends: 76 [2021-12-15 21:40:49,864 INFO L226 Difference]: Without dead ends: 51 [2021-12-15 21:40:49,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 21:40:49,865 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 52 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:40:49,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 17 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:40:49,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-15 21:40:49,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 42. [2021-12-15 21:40:49,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:49,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-12-15 21:40:49,871 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 25 [2021-12-15 21:40:49,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:40:49,872 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-12-15 21:40:49,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:49,872 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-12-15 21:40:49,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-15 21:40:49,873 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:40:49,873 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] [2021-12-15 21:40:49,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 21:40:49,874 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:40:49,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:40:49,874 INFO L85 PathProgramCache]: Analyzing trace with hash -158323138, now seen corresponding path program 1 times [2021-12-15 21:40:49,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:40:49,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753489185] [2021-12-15 21:40:49,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:40:49,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:40:49,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:40:49,968 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-15 21:40:49,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:40:49,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753489185] [2021-12-15 21:40:49,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753489185] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:40:49,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792665100] [2021-12-15 21:40:49,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:40:49,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:40:49,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:40:49,979 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:40:49,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 21:40:50,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:40:50,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 21:40:50,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:40:50,232 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-15 21:40:50,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:40:50,328 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-15 21:40:50,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792665100] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:40:50,329 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:40:50,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-15 21:40:50,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738738242] [2021-12-15 21:40:50,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:40:50,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 21:40:50,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:40:50,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 21:40:50,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-12-15 21:40:50,331 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:50,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:40:50,426 INFO L93 Difference]: Finished difference Result 81 states and 97 transitions. [2021-12-15 21:40:50,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 21:40:50,426 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-15 21:40:50,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:40:50,429 INFO L225 Difference]: With dead ends: 81 [2021-12-15 21:40:50,429 INFO L226 Difference]: Without dead ends: 45 [2021-12-15 21:40:50,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-12-15 21:40:50,439 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:40:50,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 40 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:40:50,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-15 21:40:50,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2021-12-15 21:40:50,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:50,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2021-12-15 21:40:50,447 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 41 [2021-12-15 21:40:50,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:40:50,448 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2021-12-15 21:40:50,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:50,448 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2021-12-15 21:40:50,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-15 21:40:50,449 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:40:50,449 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] [2021-12-15 21:40:50,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 21:40:50,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:40:50,650 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:40:50,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:40:50,651 INFO L85 PathProgramCache]: Analyzing trace with hash 408266208, now seen corresponding path program 2 times [2021-12-15 21:40:50,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:40:50,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887073021] [2021-12-15 21:40:50,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:40:50,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:40:50,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:40:50,707 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 21:40:50,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:40:50,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887073021] [2021-12-15 21:40:50,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887073021] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:40:50,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167140523] [2021-12-15 21:40:50,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 21:40:50,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:40:50,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:40:50,710 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:40:50,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 21:40:50,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 21:40:50,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:40:50,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 21:40:50,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:40:50,891 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 21:40:50,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:40:50,990 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 21:40:50,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167140523] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:40:50,991 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:40:50,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-12-15 21:40:50,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524295460] [2021-12-15 21:40:50,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:40:50,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 21:40:50,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:40:50,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 21:40:50,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-12-15 21:40:50,998 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:51,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:40:51,116 INFO L93 Difference]: Finished difference Result 101 states and 123 transitions. [2021-12-15 21:40:51,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 21:40:51,116 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-15 21:40:51,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:40:51,117 INFO L225 Difference]: With dead ends: 101 [2021-12-15 21:40:51,117 INFO L226 Difference]: Without dead ends: 69 [2021-12-15 21:40:51,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2021-12-15 21:40:51,118 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 49 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:40:51,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 20 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:40:51,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-15 21:40:51,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2021-12-15 21:40:51,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.152542372881356) internal successors, (68), 59 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:51,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2021-12-15 21:40:51,124 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 43 [2021-12-15 21:40:51,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:40:51,125 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2021-12-15 21:40:51,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:51,125 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2021-12-15 21:40:51,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-15 21:40:51,126 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:40:51,126 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 21:40:51,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 21:40:51,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:40:51,347 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:40:51,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:40:51,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1004340752, now seen corresponding path program 3 times [2021-12-15 21:40:51,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:40:51,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065045215] [2021-12-15 21:40:51,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:40:51,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:40:51,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:40:52,674 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:40:52,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:40:52,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065045215] [2021-12-15 21:40:52,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065045215] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:40:52,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812369761] [2021-12-15 21:40:52,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 21:40:52,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:40:52,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:40:52,680 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:40:52,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 21:40:52,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-15 21:40:52,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:40:52,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 85 conjunts are in the unsatisfiable core [2021-12-15 21:40:52,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:40:54,494 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 21:40:54,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2021-12-15 21:40:54,721 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:40:54,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:41:06,169 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 21:41:06,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 103 [2021-12-15 21:41:07,767 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:41:07,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812369761] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:41:07,767 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:41:07,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 24, 28] total 63 [2021-12-15 21:41:07,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244168974] [2021-12-15 21:41:07,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:41:07,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-15 21:41:07,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:41:07,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-15 21:41:07,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=3495, Unknown=1, NotChecked=0, Total=3906 [2021-12-15 21:41:07,771 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 63 states, 63 states have (on average 2.6825396825396823) internal successors, (169), 63 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:41:11,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:41:11,085 INFO L93 Difference]: Finished difference Result 208 states and 241 transitions. [2021-12-15 21:41:11,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-15 21:41:11,086 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.6825396825396823) internal successors, (169), 63 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-12-15 21:41:11,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:41:11,089 INFO L225 Difference]: With dead ends: 208 [2021-12-15 21:41:11,089 INFO L226 Difference]: Without dead ends: 204 [2021-12-15 21:41:11,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 70 SyntacticMatches, 46 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4297 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=1114, Invalid=10227, Unknown=1, NotChecked=0, Total=11342 [2021-12-15 21:41:11,093 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 58 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 1410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 931 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 21:41:11,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 133 Invalid, 1410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 411 Invalid, 0 Unknown, 931 Unchecked, 0.3s Time] [2021-12-15 21:41:11,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-12-15 21:41:11,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 101. [2021-12-15 21:41:11,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.16) internal successors, (116), 100 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:41:11,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 116 transitions. [2021-12-15 21:41:11,105 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 116 transitions. Word has length 59 [2021-12-15 21:41:11,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:41:11,106 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 116 transitions. [2021-12-15 21:41:11,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.6825396825396823) internal successors, (169), 63 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:41:11,106 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 116 transitions. [2021-12-15 21:41:11,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-15 21:41:11,107 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:41:11,108 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-12-15 21:41:11,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 21:41:11,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:41:11,324 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:41:11,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:41:11,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1580077422, now seen corresponding path program 4 times [2021-12-15 21:41:11,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:41:11,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752059076] [2021-12-15 21:41:11,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:41:11,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:41:11,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:41:11,429 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-15 21:41:11,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:41:11,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752059076] [2021-12-15 21:41:11,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752059076] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:41:11,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913476712] [2021-12-15 21:41:11,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 21:41:11,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:41:11,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:41:11,432 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:41:11,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 21:41:11,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 21:41:11,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:41:11,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 21:41:11,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:41:11,620 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-15 21:41:11,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:41:11,718 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-15 21:41:11,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913476712] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:41:11,718 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:41:11,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-15 21:41:11,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948478469] [2021-12-15 21:41:11,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:41:11,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-15 21:41:11,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:41:11,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-15 21:41:11,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-15 21:41:11,720 INFO L87 Difference]: Start difference. First operand 101 states and 116 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:41:11,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:41:11,987 INFO L93 Difference]: Finished difference Result 233 states and 268 transitions. [2021-12-15 21:41:11,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-15 21:41:11,988 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-15 21:41:11,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:41:11,989 INFO L225 Difference]: With dead ends: 233 [2021-12-15 21:41:11,989 INFO L226 Difference]: Without dead ends: 136 [2021-12-15 21:41:11,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-12-15 21:41:11,990 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 192 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:41:11,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 38 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 21:41:11,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-12-15 21:41:12,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 112. [2021-12-15 21:41:12,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.135135135135135) internal successors, (126), 111 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:41:12,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 126 transitions. [2021-12-15 21:41:12,004 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 126 transitions. Word has length 61 [2021-12-15 21:41:12,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:41:12,004 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 126 transitions. [2021-12-15 21:41:12,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:41:12,004 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 126 transitions. [2021-12-15 21:41:12,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-15 21:41:12,005 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:41:12,006 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-12-15 21:41:12,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 21:41:12,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:41:12,219 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:41:12,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:41:12,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1506179060, now seen corresponding path program 5 times [2021-12-15 21:41:12,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:41:12,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032361954] [2021-12-15 21:41:12,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:41:12,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:41:12,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:41:12,289 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-15 21:41:12,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:41:12,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032361954] [2021-12-15 21:41:12,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032361954] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:41:12,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441057162] [2021-12-15 21:41:12,290 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 21:41:12,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:41:12,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:41:12,291 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:41:12,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 21:41:12,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-15 21:41:12,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:41:12,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 21:41:12,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:41:12,500 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-15 21:41:12,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:41:12,601 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-15 21:41:12,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441057162] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:41:12,602 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:41:12,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-15 21:41:12,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221145222] [2021-12-15 21:41:12,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:41:12,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-15 21:41:12,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:41:12,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-15 21:41:12,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-15 21:41:12,603 INFO L87 Difference]: Start difference. First operand 112 states and 126 transitions. Second operand has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:41:12,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:41:12,852 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2021-12-15 21:41:12,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 21:41:12,852 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-15 21:41:12,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:41:12,853 INFO L225 Difference]: With dead ends: 126 [2021-12-15 21:41:12,853 INFO L226 Difference]: Without dead ends: 86 [2021-12-15 21:41:12,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-12-15 21:41:12,854 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 106 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:41:12,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 33 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 21:41:12,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-15 21:41:12,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2021-12-15 21:41:12,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.1168831168831168) internal successors, (86), 77 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:41:12,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2021-12-15 21:41:12,860 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 63 [2021-12-15 21:41:12,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:41:12,861 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2021-12-15 21:41:12,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:41:12,861 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2021-12-15 21:41:12,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-15 21:41:12,862 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:41:12,862 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 21:41:12,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 21:41:13,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:41:13,068 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:41:13,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:41:13,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1152417058, now seen corresponding path program 6 times [2021-12-15 21:41:13,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:41:13,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707007058] [2021-12-15 21:41:13,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:41:13,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:41:13,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:41:17,054 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:41:17,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:41:17,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707007058] [2021-12-15 21:41:17,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707007058] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:41:17,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359616908] [2021-12-15 21:41:17,055 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 21:41:17,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:41:17,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:41:17,056 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:41:17,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 21:41:17,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-15 21:41:17,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:41:17,123 WARN L261 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 111 conjunts are in the unsatisfiable core [2021-12-15 21:41:17,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:41:20,135 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:41:20,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:41:40,790 INFO L354 Elim1Store]: treesize reduction 185, result has 55.3 percent of original size [2021-12-15 21:41:40,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 152 treesize of output 263 [2021-12-15 21:41:47,683 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 4 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:41:47,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359616908] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:41:47,683 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:41:47,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 41, 39] total 125 [2021-12-15 21:41:47,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775862426] [2021-12-15 21:41:47,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:41:47,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2021-12-15 21:41:47,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:41:47,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2021-12-15 21:41:47,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=786, Invalid=14711, Unknown=3, NotChecked=0, Total=15500 [2021-12-15 21:41:47,689 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand has 125 states, 125 states have (on average 1.728) internal successors, (216), 125 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:41:54,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:41:54,048 INFO L93 Difference]: Finished difference Result 169 states and 189 transitions. [2021-12-15 21:41:54,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-15 21:41:54,049 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 1.728) internal successors, (216), 125 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-15 21:41:54,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:41:54,050 INFO L225 Difference]: With dead ends: 169 [2021-12-15 21:41:54,050 INFO L226 Difference]: Without dead ends: 165 [2021-12-15 21:41:54,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 83 SyntacticMatches, 27 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 6 DeprecatedPredicates, 8903 ImplicationChecksByTransitivity, 28.9s TimeCoverageRelationStatistics Valid=1401, Invalid=23088, Unknown=3, NotChecked=0, Total=24492 [2021-12-15 21:41:54,069 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 105 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 2761 mSolverCounterSat, 456 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 4798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 456 IncrementalHoareTripleChecker+Valid, 2761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1581 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-15 21:41:54,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 273 Invalid, 4798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [456 Valid, 2761 Invalid, 0 Unknown, 1581 Unchecked, 1.9s Time] [2021-12-15 21:41:54,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-12-15 21:41:54,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 131. [2021-12-15 21:41:54,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.123076923076923) internal successors, (146), 130 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:41:54,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 146 transitions. [2021-12-15 21:41:54,117 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 146 transitions. Word has length 77 [2021-12-15 21:41:54,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:41:54,117 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 146 transitions. [2021-12-15 21:41:54,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 1.728) internal successors, (216), 125 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:41:54,118 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 146 transitions. [2021-12-15 21:41:54,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-15 21:41:54,124 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:41:54,124 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-12-15 21:41:54,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 21:41:54,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:41:54,339 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:41:54,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:41:54,340 INFO L85 PathProgramCache]: Analyzing trace with hash -214262460, now seen corresponding path program 7 times [2021-12-15 21:41:54,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:41:54,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903727072] [2021-12-15 21:41:54,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:41:54,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:41:54,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:41:54,480 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-15 21:41:54,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:41:54,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903727072] [2021-12-15 21:41:54,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903727072] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:41:54,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124802209] [2021-12-15 21:41:54,482 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 21:41:54,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:41:54,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:41:54,496 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:41:54,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 21:41:54,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:41:54,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-15 21:41:54,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:41:54,939 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-15 21:41:54,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:41:55,089 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-15 21:41:55,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124802209] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:41:55,089 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:41:55,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-15 21:41:55,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759065182] [2021-12-15 21:41:55,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:41:55,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-15 21:41:55,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:41:55,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-15 21:41:55,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-15 21:41:55,091 INFO L87 Difference]: Start difference. First operand 131 states and 146 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)