./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-programs/partial_mod_count_2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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-programs/partial_mod_count_2.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 5d98532a5d518c1ba99a39e0965faf5a69d8ad5bf82f7713684141895d3e8815 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 11:21:29,394 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 11:21:29,412 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 11:21:29,451 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 11:21:29,453 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 11:21:29,454 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 11:21:29,455 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 11:21:29,457 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 11:21:29,458 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 11:21:29,459 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 11:21:29,460 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 11:21:29,460 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 11:21:29,462 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 11:21:29,464 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 11:21:29,466 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 11:21:29,468 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 11:21:29,471 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 11:21:29,476 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 11:21:29,477 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 11:21:29,479 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 11:21:29,483 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 11:21:29,484 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 11:21:29,485 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 11:21:29,486 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 11:21:29,488 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 11:21:29,492 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 11:21:29,492 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 11:21:29,493 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 11:21:29,493 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 11:21:29,494 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 11:21:29,496 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 11:21:29,496 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 11:21:29,497 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 11:21:29,498 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 11:21:29,499 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 11:21:29,499 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 11:21:29,500 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 11:21:29,501 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 11:21:29,501 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 11:21:29,502 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 11:21:29,502 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 11:21:29,503 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 11:21:29,525 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 11:21:29,525 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 11:21:29,525 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 11:21:29,525 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 11:21:29,526 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 11:21:29,526 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 11:21:29,527 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 11:21:29,527 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 11:21:29,527 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 11:21:29,527 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 11:21:29,528 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 11:21:29,528 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 11:21:29,528 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 11:21:29,528 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 11:21:29,528 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 11:21:29,528 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 11:21:29,529 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 11:21:29,529 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 11:21:29,529 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 11:21:29,529 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 11:21:29,529 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 11:21:29,529 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 11:21:29,530 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 11:21:29,530 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 11:21:29,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 11:21:29,530 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 11:21:29,530 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 11:21:29,531 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 11:21:29,531 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 11:21:29,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 11:21:29,531 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 11:21:29,531 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 11:21:29,532 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 11:21:29,532 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 11:21:29,532 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5d98532a5d518c1ba99a39e0965faf5a69d8ad5bf82f7713684141895d3e8815 [2021-12-14 11:21:29,718 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 11:21:29,739 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 11:21:29,742 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 11:21:29,743 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 11:21:29,744 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 11:21:29,745 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/partial_mod_count_2.c [2021-12-14 11:21:29,821 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e060f411b/904a97c136824f14a04a25472dc329cc/FLAGc4434377e [2021-12-14 11:21:30,190 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 11:21:30,190 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_2.c [2021-12-14 11:21:30,195 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e060f411b/904a97c136824f14a04a25472dc329cc/FLAGc4434377e [2021-12-14 11:21:30,652 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e060f411b/904a97c136824f14a04a25472dc329cc [2021-12-14 11:21:30,655 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 11:21:30,656 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 11:21:30,657 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 11:21:30,657 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 11:21:30,662 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 11:21:30,662 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:21:30" (1/1) ... [2021-12-14 11:21:30,663 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42be5962 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:21:30, skipping insertion in model container [2021-12-14 11:21:30,663 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:21:30" (1/1) ... [2021-12-14 11:21:30,669 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 11:21:30,682 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 11:21:30,821 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-programs/partial_mod_count_2.c[323,336] [2021-12-14 11:21:30,843 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 11:21:30,850 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 11:21:30,860 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-programs/partial_mod_count_2.c[323,336] [2021-12-14 11:21:30,870 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 11:21:30,881 INFO L208 MainTranslator]: Completed translation [2021-12-14 11:21:30,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:21:30 WrapperNode [2021-12-14 11:21:30,881 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 11:21:30,882 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 11:21:30,882 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 11:21:30,882 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 11:21:30,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:21:30" (1/1) ... [2021-12-14 11:21:30,891 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:21:30" (1/1) ... [2021-12-14 11:21:30,906 INFO L137 Inliner]: procedures = 13, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 53 [2021-12-14 11:21:30,907 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 11:21:30,908 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 11:21:30,908 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 11:21:30,908 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 11:21:30,914 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:21:30" (1/1) ... [2021-12-14 11:21:30,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:21:30" (1/1) ... [2021-12-14 11:21:30,915 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:21:30" (1/1) ... [2021-12-14 11:21:30,916 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:21:30" (1/1) ... [2021-12-14 11:21:30,919 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:21:30" (1/1) ... [2021-12-14 11:21:30,922 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:21:30" (1/1) ... [2021-12-14 11:21:30,922 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:21:30" (1/1) ... [2021-12-14 11:21:30,924 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 11:21:30,925 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 11:21:30,925 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 11:21:30,925 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 11:21:30,926 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:21:30" (1/1) ... [2021-12-14 11:21:30,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 11:21:30,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:21:30,964 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) [2021-12-14 11:21:30,988 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 [2021-12-14 11:21:31,005 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 11:21:31,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 11:21:31,005 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 11:21:31,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 11:21:31,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 11:21:31,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 11:21:31,006 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 11:21:31,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 11:21:31,061 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 11:21:31,063 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 11:21:31,165 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 11:21:31,170 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 11:21:31,170 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-14 11:21:31,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:21:31 BoogieIcfgContainer [2021-12-14 11:21:31,171 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 11:21:31,173 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 11:21:31,173 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 11:21:31,175 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 11:21:31,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:21:30" (1/3) ... [2021-12-14 11:21:31,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@155c19e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:21:31, skipping insertion in model container [2021-12-14 11:21:31,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:21:30" (2/3) ... [2021-12-14 11:21:31,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@155c19e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:21:31, skipping insertion in model container [2021-12-14 11:21:31,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:21:31" (3/3) ... [2021-12-14 11:21:31,178 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_2.c [2021-12-14 11:21:31,182 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 11:21:31,182 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 11:21:31,219 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 11:21:31,227 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 [2021-12-14 11:21:31,227 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 11:21:31,237 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:21:31,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-14 11:21:31,245 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:21:31,246 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:21:31,246 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:21:31,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:21:31,250 INFO L85 PathProgramCache]: Analyzing trace with hash -694175938, now seen corresponding path program 1 times [2021-12-14 11:21:31,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:21:31,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180573951] [2021-12-14 11:21:31,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:21:31,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:21:31,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:21:31,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:21:31,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:21:31,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180573951] [2021-12-14 11:21:31,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180573951] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:21:31,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:21:31,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 11:21:31,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606814236] [2021-12-14 11:21:31,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:21:31,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-14 11:21:31,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:21:31,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-14 11:21:31,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 11:21:31,464 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:21:31,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:21:31,473 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2021-12-14 11:21:31,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 11:21:31,475 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-12-14 11:21:31,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:21:31,480 INFO L225 Difference]: With dead ends: 31 [2021-12-14 11:21:31,480 INFO L226 Difference]: Without dead ends: 14 [2021-12-14 11:21:31,482 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 [2021-12-14 11:21:31,485 INFO L933 BasicCegarLoop]: 21 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, 21 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 [2021-12-14 11:21:31,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:21:31,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-12-14 11:21:31,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-12-14 11:21:31,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:21:31,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-12-14 11:21:31,509 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 9 [2021-12-14 11:21:31,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:21:31,510 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-12-14 11:21:31,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:21:31,510 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-12-14 11:21:31,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-14 11:21:31,511 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:21:31,511 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:21:31,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 11:21:31,512 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:21:31,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:21:31,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1866781837, now seen corresponding path program 1 times [2021-12-14 11:21:31,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:21:31,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064212645] [2021-12-14 11:21:31,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:21:31,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:21:31,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:21:31,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:21:31,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:21:31,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064212645] [2021-12-14 11:21:31,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064212645] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:21:31,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:21:31,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 11:21:31,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744561980] [2021-12-14 11:21:31,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:21:31,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 11:21:31,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:21:31,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 11:21:31,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 11:21:31,567 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:21:31,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:21:31,604 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2021-12-14 11:21:31,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 11:21:31,605 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-12-14 11:21:31,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:21:31,606 INFO L225 Difference]: With dead ends: 37 [2021-12-14 11:21:31,606 INFO L226 Difference]: Without dead ends: 25 [2021-12-14 11:21:31,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 11:21:31,608 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 36 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:21:31,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 14 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:21:31,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-14 11:21:31,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 16. [2021-12-14 11:21:31,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:21:31,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-12-14 11:21:31,613 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2021-12-14 11:21:31,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:21:31,613 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-12-14 11:21:31,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:21:31,614 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-12-14 11:21:31,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-14 11:21:31,614 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:21:31,615 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:21:31,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 11:21:31,615 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:21:31,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:21:31,616 INFO L85 PathProgramCache]: Analyzing trace with hash 97563565, now seen corresponding path program 1 times [2021-12-14 11:21:31,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:21:31,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205428041] [2021-12-14 11:21:31,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:21:31,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:21:31,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:21:31,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:21:31,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:21:31,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205428041] [2021-12-14 11:21:31,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205428041] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:21:31,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815971858] [2021-12-14 11:21:31,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:21:31,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:21:31,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:21:31,730 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) [2021-12-14 11:21:31,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 11:21:31,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:21:31,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 11:21:31,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:21:31,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:21:31,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:21:31,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:21:31,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815971858] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:21:31,980 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:21:31,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2021-12-14 11:21:31,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370894567] [2021-12-14 11:21:31,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:21:31,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 11:21:31,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:21:31,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 11:21:31,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-12-14 11:21:31,987 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 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) [2021-12-14 11:21:32,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:21:32,129 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2021-12-14 11:21:32,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 11:21:32,130 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 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 12 [2021-12-14 11:21:32,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:21:32,131 INFO L225 Difference]: With dead ends: 61 [2021-12-14 11:21:32,132 INFO L226 Difference]: Without dead ends: 49 [2021-12-14 11:21:32,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-12-14 11:21:32,133 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 104 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:21:32,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 32 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 11:21:32,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-14 11:21:32,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 24. [2021-12-14 11:21:32,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:21:32,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-12-14 11:21:32,145 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 12 [2021-12-14 11:21:32,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:21:32,145 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-12-14 11:21:32,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 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) [2021-12-14 11:21:32,146 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-12-14 11:21:32,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-14 11:21:32,146 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:21:32,146 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:21:32,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-14 11:21:32,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:21:32,348 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:21:32,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:21:32,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1361285581, now seen corresponding path program 1 times [2021-12-14 11:21:32,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:21:32,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91027492] [2021-12-14 11:21:32,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:21:32,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:21:32,374 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 11:21:32,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1217397909] [2021-12-14 11:21:32,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:21:32,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:21:32,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:21:32,376 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) [2021-12-14 11:21:32,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 11:21:32,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:21:32,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 11:21:32,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:21:32,563 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:21:32,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:21:32,667 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:21:32,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:21:32,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91027492] [2021-12-14 11:21:32,670 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 11:21:32,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217397909] [2021-12-14 11:21:32,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217397909] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:21:32,672 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 11:21:32,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-12-14 11:21:32,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839744421] [2021-12-14 11:21:32,674 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 11:21:32,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 11:21:32,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:21:32,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 11:21:32,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2021-12-14 11:21:32,676 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:21:32,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:21:32,891 INFO L93 Difference]: Finished difference Result 131 states and 157 transitions. [2021-12-14 11:21:32,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 11:21:32,892 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 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 21 [2021-12-14 11:21:32,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:21:32,896 INFO L225 Difference]: With dead ends: 131 [2021-12-14 11:21:32,896 INFO L226 Difference]: Without dead ends: 117 [2021-12-14 11:21:32,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2021-12-14 11:21:32,899 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 324 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:21:32,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 62 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 11:21:32,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-14 11:21:32,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 42. [2021-12-14 11:21:32,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:21:32,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2021-12-14 11:21:32,919 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 21 [2021-12-14 11:21:32,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:21:32,920 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2021-12-14 11:21:32,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:21:32,920 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2021-12-14 11:21:32,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-14 11:21:32,921 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:21:32,921 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:21:32,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 11:21:33,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-14 11:21:33,144 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:21:33,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:21:33,144 INFO L85 PathProgramCache]: Analyzing trace with hash 194524081, now seen corresponding path program 2 times [2021-12-14 11:21:33,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:21:33,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998486319] [2021-12-14 11:21:33,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:21:33,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:21:33,170 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 11:21:33,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1608799015] [2021-12-14 11:21:33,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 11:21:33,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:21:33,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:21:33,173 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) [2021-12-14 11:21:33,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 11:21:33,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-14 11:21:33,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:21:33,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 11:21:33,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:21:33,484 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-14 11:21:33,484 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 11:21:33,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:21:33,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998486319] [2021-12-14 11:21:33,485 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 11:21:33,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608799015] [2021-12-14 11:21:33,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608799015] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:21:33,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:21:33,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 11:21:33,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917899985] [2021-12-14 11:21:33,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:21:33,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 11:21:33,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:21:33,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 11:21:33,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-14 11:21:33,487 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:21:33,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:21:33,550 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2021-12-14 11:21:33,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 11:21:33,550 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-14 11:21:33,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:21:33,551 INFO L225 Difference]: With dead ends: 61 [2021-12-14 11:21:33,551 INFO L226 Difference]: Without dead ends: 59 [2021-12-14 11:21:33,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-12-14 11:21:33,552 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 33 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:21:33,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 28 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:21:33,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-14 11:21:33,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2021-12-14 11:21:33,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:21:33,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2021-12-14 11:21:33,558 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 39 [2021-12-14 11:21:33,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:21:33,559 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2021-12-14 11:21:33,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:21:33,559 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2021-12-14 11:21:33,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-14 11:21:33,560 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:21:33,560 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:21:33,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 11:21:33,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:21:33,776 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:21:33,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:21:33,776 INFO L85 PathProgramCache]: Analyzing trace with hash -838184220, now seen corresponding path program 1 times [2021-12-14 11:21:33,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:21:33,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475175726] [2021-12-14 11:21:33,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:21:33,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:21:33,796 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 11:21:33,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [565242482] [2021-12-14 11:21:33,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:21:33,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:21:33,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:21:33,798 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) [2021-12-14 11:21:33,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 11:21:33,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:21:33,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-14 11:21:33,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:21:34,150 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 11:21:34,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:21:34,395 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 11:21:34,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:21:34,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475175726] [2021-12-14 11:21:34,397 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 11:21:34,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565242482] [2021-12-14 11:21:34,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565242482] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:21:34,397 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 11:21:34,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-12-14 11:21:34,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050558119] [2021-12-14 11:21:34,398 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 11:21:34,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-14 11:21:34,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:21:34,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-14 11:21:34,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2021-12-14 11:21:34,400 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:21:34,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:21:34,910 INFO L93 Difference]: Finished difference Result 547 states and 646 transitions. [2021-12-14 11:21:34,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-14 11:21:34,911 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-12-14 11:21:34,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:21:34,913 INFO L225 Difference]: With dead ends: 547 [2021-12-14 11:21:34,913 INFO L226 Difference]: Without dead ends: 512 [2021-12-14 11:21:34,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2021-12-14 11:21:34,915 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 983 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 11:21:34,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [983 Valid, 134 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 11:21:34,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-12-14 11:21:34,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 90. [2021-12-14 11:21:34,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.1797752808988764) internal successors, (105), 89 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:21:34,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 105 transitions. [2021-12-14 11:21:34,926 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 105 transitions. Word has length 45 [2021-12-14 11:21:34,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:21:34,926 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 105 transitions. [2021-12-14 11:21:34,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:21:34,927 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 105 transitions. [2021-12-14 11:21:34,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-14 11:21:34,928 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:21:34,928 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:21:34,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 11:21:35,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:21:35,143 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:21:35,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:21:35,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1895724964, now seen corresponding path program 2 times [2021-12-14 11:21:35,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:21:35,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991315905] [2021-12-14 11:21:35,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:21:35,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:21:35,174 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 11:21:35,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1554020723] [2021-12-14 11:21:35,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 11:21:35,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:21:35,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:21:35,176 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) [2021-12-14 11:21:35,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 11:21:35,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 11:21:35,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:21:35,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-14 11:21:35,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:21:35,863 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 11:21:35,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:21:36,650 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 11:21:36,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:21:36,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991315905] [2021-12-14 11:21:36,651 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 11:21:36,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554020723] [2021-12-14 11:21:36,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554020723] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:21:36,651 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 11:21:36,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2021-12-14 11:21:36,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621201823] [2021-12-14 11:21:36,652 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 11:21:36,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-14 11:21:36,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:21:36,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-14 11:21:36,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2021-12-14 11:21:36,654 INFO L87 Difference]: Start difference. First operand 90 states and 105 transitions. Second operand has 50 states, 50 states have (on average 2.94) internal successors, (147), 49 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:21:38,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:21:38,296 INFO L93 Difference]: Finished difference Result 1135 states and 1342 transitions. [2021-12-14 11:21:38,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-14 11:21:38,296 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.94) internal successors, (147), 49 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-14 11:21:38,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:21:38,300 INFO L225 Difference]: With dead ends: 1135 [2021-12-14 11:21:38,300 INFO L226 Difference]: Without dead ends: 1082 [2021-12-14 11:21:38,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2021-12-14 11:21:38,303 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 1681 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1681 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 11:21:38,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1681 Valid, 278 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 11:21:38,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2021-12-14 11:21:38,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 162. [2021-12-14 11:21:38,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.173913043478261) internal successors, (189), 161 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:21:38,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 189 transitions. [2021-12-14 11:21:38,318 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 189 transitions. Word has length 81 [2021-12-14 11:21:38,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:21:38,318 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 189 transitions. [2021-12-14 11:21:38,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.94) internal successors, (147), 49 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:21:38,319 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 189 transitions. [2021-12-14 11:21:38,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-14 11:21:38,320 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:21:38,320 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:21:38,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 11:21:38,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:21:38,536 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:21:38,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:21:38,536 INFO L85 PathProgramCache]: Analyzing trace with hash 694735140, now seen corresponding path program 3 times [2021-12-14 11:21:38,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:21:38,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098727412] [2021-12-14 11:21:38,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:21:38,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:21:38,586 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 11:21:38,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1295578159] [2021-12-14 11:21:38,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 11:21:38,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:21:38,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:21:38,588 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) [2021-12-14 11:21:38,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 11:21:38,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-14 11:21:38,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:21:38,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 11:21:38,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:21:39,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3155 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2021-12-14 11:21:39,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:21:41,488 INFO L134 CoverageAnalysis]: Checked inductivity of 3155 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2021-12-14 11:21:41,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:21:41,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098727412] [2021-12-14 11:21:41,488 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 11:21:41,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295578159] [2021-12-14 11:21:41,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295578159] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:21:41,489 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 11:21:41,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-14 11:21:41,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13049675] [2021-12-14 11:21:41,489 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 11:21:41,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-14 11:21:41,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:21:41,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-14 11:21:41,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-12-14 11:21:41,491 INFO L87 Difference]: Start difference. First operand 162 states and 189 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:21:41,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:21:41,661 INFO L93 Difference]: Finished difference Result 193 states and 228 transitions. [2021-12-14 11:21:41,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 11:21:41,662 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 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 153 [2021-12-14 11:21:41,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:21:41,663 INFO L225 Difference]: With dead ends: 193 [2021-12-14 11:21:41,663 INFO L226 Difference]: Without dead ends: 191 [2021-12-14 11:21:41,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 294 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=188, Unknown=0, NotChecked=0, Total=306 [2021-12-14 11:21:41,664 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 163 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:21:41,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 42 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 11:21:41,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-12-14 11:21:41,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 186. [2021-12-14 11:21:41,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.172972972972973) internal successors, (217), 185 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:21:41,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 217 transitions. [2021-12-14 11:21:41,684 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 217 transitions. Word has length 153 [2021-12-14 11:21:41,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:21:41,685 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 217 transitions. [2021-12-14 11:21:41,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:21:41,685 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 217 transitions. [2021-12-14 11:21:41,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-12-14 11:21:41,690 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:21:41,691 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 23, 23, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2021-12-14 11:21:41,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 11:21:41,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:21:41,906 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:21:41,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:21:41,906 INFO L85 PathProgramCache]: Analyzing trace with hash -86837392, now seen corresponding path program 4 times [2021-12-14 11:21:41,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:21:41,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138690066] [2021-12-14 11:21:41,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:21:41,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:21:42,000 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 11:21:42,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1501208761] [2021-12-14 11:21:42,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 11:21:42,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:21:42,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:21:42,002 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) [2021-12-14 11:21:42,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 11:21:42,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 11:21:42,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:21:42,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-14 11:21:42,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:21:44,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3231 backedges. 3015 proven. 216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:21:44,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:21:50,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3231 backedges. 3015 proven. 216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:21:50,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:21:50,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138690066] [2021-12-14 11:21:50,184 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 11:21:50,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501208761] [2021-12-14 11:21:50,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501208761] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:21:50,184 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 11:21:50,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 109 [2021-12-14 11:21:50,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807214629] [2021-12-14 11:21:50,185 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 11:21:50,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2021-12-14 11:21:50,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:21:50,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2021-12-14 11:21:50,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4111, Invalid=7661, Unknown=0, NotChecked=0, Total=11772 [2021-12-14 11:21:50,191 INFO L87 Difference]: Start difference. First operand 186 states and 217 transitions. Second operand has 109 states, 109 states have (on average 3.220183486238532) internal successors, (351), 109 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)