./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec 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/nla-digbench-scaling/prod4br-ll_unwindbound1.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 2078f73240fa6cada48e366db3f43ef0ebe005c4 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 07:35:31,797 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 07:35:31,799 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 07:35:31,829 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 07:35:31,829 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 07:35:31,830 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 07:35:31,831 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 07:35:31,832 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 07:35:31,833 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 07:35:31,834 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 07:35:31,834 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 07:35:31,835 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 07:35:31,835 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 07:35:31,836 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 07:35:31,837 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 07:35:31,837 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 07:35:31,838 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 07:35:31,839 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 07:35:31,840 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 07:35:31,841 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 07:35:31,842 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 07:35:31,857 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 07:35:31,858 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 07:35:31,858 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 07:35:31,860 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 07:35:31,860 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 07:35:31,860 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 07:35:31,861 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 07:35:31,861 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 07:35:31,862 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 07:35:31,862 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 07:35:31,862 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 07:35:31,863 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 07:35:31,863 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 07:35:31,864 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 07:35:31,864 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 07:35:31,864 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 07:35:31,865 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 07:35:31,865 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 07:35:31,865 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 07:35:31,866 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 07:35:31,866 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 07:35:31,881 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 07:35:31,881 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 07:35:31,881 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 07:35:31,881 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 07:35:31,882 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 07:35:31,882 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 07:35:31,882 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 07:35:31,883 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 07:35:31,883 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 07:35:31,883 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 07:35:31,883 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 07:35:31,883 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 07:35:31,883 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 07:35:31,883 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 07:35:31,883 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 07:35:31,883 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 07:35:31,883 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 07:35:31,883 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 07:35:31,883 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 07:35:31,883 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 07:35:31,884 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 07:35:31,884 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 07:35:31,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 07:35:31,884 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 07:35:31,884 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 07:35:31,884 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 07:35:31,884 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 07:35:31,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 07:35:31,884 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 07:35:31,884 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 07:35:31,884 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2078f73240fa6cada48e366db3f43ef0ebe005c4 [2021-08-26 07:35:32,084 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 07:35:32,100 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 07:35:32,102 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 07:35:32,103 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 07:35:32,103 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 07:35:32,104 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound1.c [2021-08-26 07:35:32,146 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1f38156a/1c8843e48d6f4e36b3e91ee8689dfb65/FLAGb4e0b9b6c [2021-08-26 07:35:32,500 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 07:35:32,501 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound1.c [2021-08-26 07:35:32,505 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1f38156a/1c8843e48d6f4e36b3e91ee8689dfb65/FLAGb4e0b9b6c [2021-08-26 07:35:32,919 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1f38156a/1c8843e48d6f4e36b3e91ee8689dfb65 [2021-08-26 07:35:32,927 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 07:35:32,929 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 07:35:32,938 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 07:35:32,938 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 07:35:32,941 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 07:35:32,942 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 07:35:32" (1/1) ... [2021-08-26 07:35:32,949 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f5250d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:35:32, skipping insertion in model container [2021-08-26 07:35:32,954 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 07:35:32" (1/1) ... [2021-08-26 07:35:32,959 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 07:35:32,967 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 07:35:33,148 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound1.c[524,537] [2021-08-26 07:35:33,171 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 07:35:33,187 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 07:35:33,202 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound1.c[524,537] [2021-08-26 07:35:33,232 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 07:35:33,243 INFO L208 MainTranslator]: Completed translation [2021-08-26 07:35:33,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:35:33 WrapperNode [2021-08-26 07:35:33,244 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 07:35:33,244 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 07:35:33,245 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 07:35:33,245 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 07:35:33,248 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:35:33" (1/1) ... [2021-08-26 07:35:33,252 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:35:33" (1/1) ... [2021-08-26 07:35:33,271 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 07:35:33,272 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 07:35:33,272 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 07:35:33,272 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 07:35:33,277 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:35:33" (1/1) ... [2021-08-26 07:35:33,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:35:33" (1/1) ... [2021-08-26 07:35:33,286 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:35:33" (1/1) ... [2021-08-26 07:35:33,286 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:35:33" (1/1) ... [2021-08-26 07:35:33,292 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:35:33" (1/1) ... [2021-08-26 07:35:33,294 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:35:33" (1/1) ... [2021-08-26 07:35:33,295 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:35:33" (1/1) ... [2021-08-26 07:35:33,296 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 07:35:33,296 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 07:35:33,296 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 07:35:33,296 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 07:35:33,297 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:35:33" (1/1) ... [2021-08-26 07:35:33,307 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 07:35:33,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:35:33,335 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) [2021-08-26 07:35:33,352 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 [2021-08-26 07:35:33,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 07:35:33,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 07:35:33,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 07:35:33,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 07:35:33,592 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 07:35:33,593 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-08-26 07:35:33,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 07:35:33 BoogieIcfgContainer [2021-08-26 07:35:33,594 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 07:35:33,595 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 07:35:33,595 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 07:35:33,597 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 07:35:33,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 07:35:32" (1/3) ... [2021-08-26 07:35:33,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@670e7bde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 07:35:33, skipping insertion in model container [2021-08-26 07:35:33,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:35:33" (2/3) ... [2021-08-26 07:35:33,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@670e7bde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 07:35:33, skipping insertion in model container [2021-08-26 07:35:33,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 07:35:33" (3/3) ... [2021-08-26 07:35:33,598 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound1.c [2021-08-26 07:35:33,601 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 07:35:33,601 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-08-26 07:35:33,628 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 07:35:33,633 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-08-26 07:35:33,633 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-26 07:35:33,643 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 21 states have (on average 1.619047619047619) internal successors, (34), 24 states have internal predecessors, (34), 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) [2021-08-26 07:35:33,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-26 07:35:33,646 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:35:33,647 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:35:33,647 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:35:33,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:35:33,650 INFO L82 PathProgramCache]: Analyzing trace with hash 120613195, now seen corresponding path program 1 times [2021-08-26 07:35:33,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:35:33,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183518871] [2021-08-26 07:35:33,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:35:33,658 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:35:33,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:35:33,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:35:33,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:35:33,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183518871] [2021-08-26 07:35:33,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183518871] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:35:33,753 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:35:33,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 07:35:33,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048936209] [2021-08-26 07:35:33,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 07:35:33,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:35:33,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 07:35:33,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 07:35:33,767 INFO L87 Difference]: Start difference. First operand has 25 states, 21 states have (on average 1.619047619047619) internal successors, (34), 24 states have internal predecessors, (34), 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 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-08-26 07:35:33,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:35:33,779 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2021-08-26 07:35:33,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 07:35:33,780 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2021-08-26 07:35:33,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:35:33,785 INFO L225 Difference]: With dead ends: 47 [2021-08-26 07:35:33,785 INFO L226 Difference]: Without dead ends: 21 [2021-08-26 07:35:33,787 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 07:35:33,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-08-26 07:35:33,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-08-26 07:35:33,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:35:33,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-08-26 07:35:33,804 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 8 [2021-08-26 07:35:33,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:35:33,804 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-08-26 07:35:33,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-08-26 07:35:33,805 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-08-26 07:35:33,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-26 07:35:33,805 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:35:33,805 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:35:33,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 07:35:33,806 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:35:33,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:35:33,807 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2021-08-26 07:35:33,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:35:33,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273694056] [2021-08-26 07:35:33,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:35:33,808 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:35:33,824 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:35:33,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [415889525] [2021-08-26 07:35:33,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:35:33,825 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:35:33,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:35:33,843 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) [2021-08-26 07:35:33,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-26 07:35:33,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:35:33,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-26 07:35:33,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:35:34,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:35:34,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:35:34,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273694056] [2021-08-26 07:35:34,143 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:35:34,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415889525] [2021-08-26 07:35:34,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415889525] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:35:34,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:35:34,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 07:35:34,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919304638] [2021-08-26 07:35:34,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 07:35:34,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:35:34,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 07:35:34,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 07:35:34,146 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-08-26 07:35:34,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:35:34,229 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2021-08-26 07:35:34,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 07:35:34,230 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 8 [2021-08-26 07:35:34,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:35:34,230 INFO L225 Difference]: With dead ends: 42 [2021-08-26 07:35:34,230 INFO L226 Difference]: Without dead ends: 40 [2021-08-26 07:35:34,231 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 07:35:34,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-26 07:35:34,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 24. [2021-08-26 07:35:34,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 21 states have (on average 1.380952380952381) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:35:34,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-08-26 07:35:34,235 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 8 [2021-08-26 07:35:34,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:35:34,235 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-08-26 07:35:34,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-08-26 07:35:34,236 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-08-26 07:35:34,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-26 07:35:34,236 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:35:34,236 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:35:34,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-26 07:35:34,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:35:34,456 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:35:34,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:35:34,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1182850160, now seen corresponding path program 1 times [2021-08-26 07:35:34,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:35:34,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996778409] [2021-08-26 07:35:34,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:35:34,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:35:34,466 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:35:34,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1464144817] [2021-08-26 07:35:34,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:35:34,467 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:35:34,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:35:34,468 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) [2021-08-26 07:35:34,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-26 07:35:34,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:35:34,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-26 07:35:34,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:35:34,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:35:34,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:35:34,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996778409] [2021-08-26 07:35:34,548 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:35:34,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464144817] [2021-08-26 07:35:34,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464144817] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:35:34,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:35:34,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 07:35:34,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654585388] [2021-08-26 07:35:34,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 07:35:34,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:35:34,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 07:35:34,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 07:35:34,550 INFO L87 Difference]: Start difference. First operand 24 states and 29 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) [2021-08-26 07:35:34,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:35:34,558 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-08-26 07:35:34,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 07:35:34,559 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 [2021-08-26 07:35:34,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:35:34,559 INFO L225 Difference]: With dead ends: 32 [2021-08-26 07:35:34,559 INFO L226 Difference]: Without dead ends: 24 [2021-08-26 07:35:34,560 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 07:35:34,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-08-26 07:35:34,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-08-26 07:35:34,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 21 states have (on average 1.3333333333333333) 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) [2021-08-26 07:35:34,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-08-26 07:35:34,562 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 9 [2021-08-26 07:35:34,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:35:34,562 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-08-26 07:35:34,562 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) [2021-08-26 07:35:34,562 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-08-26 07:35:34,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-26 07:35:34,563 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:35:34,563 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:35:34,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-26 07:35:34,779 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,SelfDestructingSolverStorable2 [2021-08-26 07:35:34,779 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:35:34,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:35:34,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1415754199, now seen corresponding path program 1 times [2021-08-26 07:35:34,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:35:34,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432776156] [2021-08-26 07:35:34,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:35:34,780 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:35:34,802 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:35:34,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1643645604] [2021-08-26 07:35:34,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:35:34,802 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:35:34,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:35:34,803 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) [2021-08-26 07:35:34,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-26 07:35:34,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:35:34,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-26 07:35:34,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:35:35,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:35:35,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:35:35,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432776156] [2021-08-26 07:35:35,152 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:35:35,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643645604] [2021-08-26 07:35:35,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643645604] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:35:35,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:35:35,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-26 07:35:35,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436969280] [2021-08-26 07:35:35,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-26 07:35:35,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:35:35,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-26 07:35:35,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-26 07:35:35,154 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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) [2021-08-26 07:35:35,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:35:35,814 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2021-08-26 07:35:35,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-26 07:35:35,815 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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 11 [2021-08-26 07:35:35,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:35:35,815 INFO L225 Difference]: With dead ends: 52 [2021-08-26 07:35:35,815 INFO L226 Difference]: Without dead ends: 50 [2021-08-26 07:35:35,816 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 515.8ms TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-08-26 07:35:35,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-08-26 07:35:35,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 32. [2021-08-26 07:35:35,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 31 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:35:35,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-08-26 07:35:35,819 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 11 [2021-08-26 07:35:35,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:35:35,820 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-08-26 07:35:35,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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) [2021-08-26 07:35:35,820 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-08-26 07:35:35,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-26 07:35:35,820 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:35:35,820 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:35:35,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-08-26 07:35:36,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:35:36,029 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:35:36,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:35:36,029 INFO L82 PathProgramCache]: Analyzing trace with hash 965004492, now seen corresponding path program 1 times [2021-08-26 07:35:36,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:35:36,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095982352] [2021-08-26 07:35:36,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:35:36,030 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:35:36,041 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:35:36,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1284706180] [2021-08-26 07:35:36,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:35:36,042 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:35:36,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:35:36,051 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) [2021-08-26 07:35:36,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-26 07:35:36,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:35:36,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-26 07:35:36,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:35:36,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:35:36,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:35:36,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095982352] [2021-08-26 07:35:36,200 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:35:36,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284706180] [2021-08-26 07:35:36,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284706180] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:35:36,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:35:36,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-26 07:35:36,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89119788] [2021-08-26 07:35:36,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 07:35:36,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:35:36,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 07:35:36,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-26 07:35:36,202 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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) [2021-08-26 07:35:36,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:35:36,307 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2021-08-26 07:35:36,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 07:35:36,307 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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 13 [2021-08-26 07:35:36,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:35:36,308 INFO L225 Difference]: With dead ends: 57 [2021-08-26 07:35:36,308 INFO L226 Difference]: Without dead ends: 51 [2021-08-26 07:35:36,309 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 87.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-26 07:35:36,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-08-26 07:35:36,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2021-08-26 07:35:36,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 35 states have (on average 1.457142857142857) internal successors, (51), 37 states have internal predecessors, (51), 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) [2021-08-26 07:35:36,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 51 transitions. [2021-08-26 07:35:36,313 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 51 transitions. Word has length 13 [2021-08-26 07:35:36,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:35:36,313 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 51 transitions. [2021-08-26 07:35:36,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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) [2021-08-26 07:35:36,313 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 51 transitions. [2021-08-26 07:35:36,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-26 07:35:36,314 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:35:36,314 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:35:36,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-08-26 07:35:36,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:35:36,532 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:35:36,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:35:36,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1005087291, now seen corresponding path program 1 times [2021-08-26 07:35:36,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:35:36,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916716343] [2021-08-26 07:35:36,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:35:36,532 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:35:36,540 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:35:36,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [465410199] [2021-08-26 07:35:36,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:35:36,540 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:35:36,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:35:36,541 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) [2021-08-26 07:35:36,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-26 07:35:36,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:35:36,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-26 07:35:36,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:35:36,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:35:36,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:35:36,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916716343] [2021-08-26 07:35:36,644 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:35:36,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465410199] [2021-08-26 07:35:36,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465410199] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:35:36,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:35:36,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-08-26 07:35:36,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122750272] [2021-08-26 07:35:36,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 07:35:36,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:35:36,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 07:35:36,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-26 07:35:36,646 INFO L87 Difference]: Start difference. First operand 38 states and 51 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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) [2021-08-26 07:35:36,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:35:36,660 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2021-08-26 07:35:36,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 07:35:36,660 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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 13 [2021-08-26 07:35:36,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:35:36,660 INFO L225 Difference]: With dead ends: 56 [2021-08-26 07:35:36,661 INFO L226 Difference]: Without dead ends: 25 [2021-08-26 07:35:36,661 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-26 07:35:36,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-08-26 07:35:36,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2021-08-26 07:35:36,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 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) [2021-08-26 07:35:36,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-08-26 07:35:36,663 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 13 [2021-08-26 07:35:36,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:35:36,663 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-08-26 07:35:36,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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) [2021-08-26 07:35:36,663 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-08-26 07:35:36,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-26 07:35:36,664 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:35:36,664 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:35:36,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-26 07:35:36,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:35:36,885 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:35:36,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:35:36,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1092907201, now seen corresponding path program 1 times [2021-08-26 07:35:36,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:35:36,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607657417] [2021-08-26 07:35:36,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:35:36,886 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:35:36,892 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:35:36,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [309149906] [2021-08-26 07:35:36,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:35:36,893 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:35:36,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:35:36,910 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) [2021-08-26 07:35:36,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-26 07:35:37,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 07:35:37,030 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-26 07:35:37,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 07:35:37,052 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-26 07:35:37,052 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-26 07:35:37,053 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 07:35:37,054 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 07:35:37,054 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 07:35:37,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-26 07:35:37,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:35:37,303 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 07:35:37,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 07:35:37 BoogieIcfgContainer [2021-08-26 07:35:37,320 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 07:35:37,321 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 07:35:37,321 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 07:35:37,321 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 07:35:37,321 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 07:35:33" (3/4) ... [2021-08-26 07:35:37,322 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-26 07:35:37,347 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 07:35:37,347 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 07:35:37,348 INFO L168 Benchmark]: Toolchain (without parser) took 4418.49 ms. Allocated memory was 62.9 MB in the beginning and 111.1 MB in the end (delta: 48.2 MB). Free memory was 44.2 MB in the beginning and 56.5 MB in the end (delta: -12.3 MB). Peak memory consumption was 36.0 MB. Max. memory is 16.1 GB. [2021-08-26 07:35:37,348 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 62.9 MB. Free memory was 45.3 MB in the beginning and 45.3 MB in the end (delta: 44.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 07:35:37,349 INFO L168 Benchmark]: CACSL2BoogieTranslator took 305.75 ms. Allocated memory is still 62.9 MB. Free memory was 44.0 MB in the beginning and 45.9 MB in the end (delta: -1.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-26 07:35:37,349 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.12 ms. Allocated memory is still 62.9 MB. Free memory was 45.7 MB in the beginning and 44.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 07:35:37,349 INFO L168 Benchmark]: Boogie Preprocessor took 23.73 ms. Allocated memory is still 62.9 MB. Free memory was 44.2 MB in the beginning and 43.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 07:35:37,350 INFO L168 Benchmark]: RCFGBuilder took 297.63 ms. Allocated memory was 62.9 MB in the beginning and 86.0 MB in the end (delta: 23.1 MB). Free memory was 42.9 MB in the beginning and 68.2 MB in the end (delta: -25.4 MB). Peak memory consumption was 18.3 MB. Max. memory is 16.1 GB. [2021-08-26 07:35:37,350 INFO L168 Benchmark]: TraceAbstraction took 3725.56 ms. Allocated memory was 86.0 MB in the beginning and 111.1 MB in the end (delta: 25.2 MB). Free memory was 67.9 MB in the beginning and 58.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 33.5 MB. Max. memory is 16.1 GB. [2021-08-26 07:35:37,350 INFO L168 Benchmark]: Witness Printer took 26.42 ms. Allocated memory is still 111.1 MB. Free memory was 58.6 MB in the beginning and 56.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 07:35:37,352 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 62.9 MB. Free memory was 45.3 MB in the beginning and 45.3 MB in the end (delta: 44.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 305.75 ms. Allocated memory is still 62.9 MB. Free memory was 44.0 MB in the beginning and 45.9 MB in the end (delta: -1.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 27.12 ms. Allocated memory is still 62.9 MB. Free memory was 45.7 MB in the beginning and 44.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.73 ms. Allocated memory is still 62.9 MB. Free memory was 44.2 MB in the beginning and 43.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 297.63 ms. Allocated memory was 62.9 MB in the beginning and 86.0 MB in the end (delta: 23.1 MB). Free memory was 42.9 MB in the beginning and 68.2 MB in the end (delta: -25.4 MB). Peak memory consumption was 18.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3725.56 ms. Allocated memory was 86.0 MB in the beginning and 111.1 MB in the end (delta: 25.2 MB). Free memory was 67.9 MB in the beginning and 58.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 33.5 MB. Max. memory is 16.1 GB. * Witness Printer took 26.42 ms. Allocated memory is still 111.1 MB. Free memory was 58.6 MB in the beginning and 56.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [counter=0] [L21] int x, y; [L22] long long a, b, p, q; [L24] x = __VERIFIER_nondet_int() [L25] y = __VERIFIER_nondet_int() [L9] COND FALSE !(!cond) VAL [counter=0] [L28] a = x [L29] b = y [L30] p = 1 [L31] q = 0 VAL [counter=0] [L33] EXPR counter++ VAL [counter=1] [L33] COND TRUE counter++<1 [L12] COND FALSE !(!(cond)) VAL [counter=1] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [counter=1] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [counter=1] [L33] EXPR counter++ VAL [counter=2] [L33] COND FALSE !(counter++<1) [L12] COND TRUE !(cond) VAL [counter=2] [L14] reach_error() VAL [counter=2] - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 25 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 3675.2ms, OverallIterations: 7, TraceHistogramMax: 2, EmptinessCheckTime: 8.7ms, AutomataDifference: 909.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 116 SDtfs, 269 SDslu, 176 SDs, 0 SdLazy, 186 SolverSat, 51 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 289.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 638.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=5, InterpolantAutomatonStates: 35, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 24.2ms AutomataMinimizationTime, 6 MinimizatonAttempts, 51 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 39.2ms SsaConstructionTime, 95.1ms SatisfiabilityAnalysisTime, 710.8ms InterpolantComputationTime, 76 NumberOfCodeBlocks, 76 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 56 ConstructedInterpolants, 1 QuantifiedInterpolants, 275 SizeOfPredicates, 25 NumberOfNonLiveVariables, 369 ConjunctsInSsa, 46 ConjunctsInUnsatCore, 6 InterpolantComputations, 5 PerfectInterpolantSequences, 2/3 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-08-26 07:35:37,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...