./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_valuebound5.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_valuebound5.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 316221dba218ae429564ea6aa4d6c3cc1066683e ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 07:46:28,817 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 07:46:28,818 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 07:46:28,842 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 07:46:28,843 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 07:46:28,844 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 07:46:28,845 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 07:46:28,847 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 07:46:28,856 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 07:46:28,862 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 07:46:28,863 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 07:46:28,864 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 07:46:28,866 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 07:46:28,868 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 07:46:28,869 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 07:46:28,871 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 07:46:28,872 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 07:46:28,873 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 07:46:28,877 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 07:46:28,879 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 07:46:28,883 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 07:46:28,885 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 07:46:28,886 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 07:46:28,888 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 07:46:28,891 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 07:46:28,895 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 07:46:28,895 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 07:46:28,896 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 07:46:28,897 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 07:46:28,898 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 07:46:28,898 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 07:46:28,899 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 07:46:28,900 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 07:46:28,901 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 07:46:28,902 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 07:46:28,903 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 07:46:28,903 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 07:46:28,903 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 07:46:28,904 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 07:46:28,905 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 07:46:28,906 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 07:46:28,907 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 07:46:28,941 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 07:46:28,942 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 07:46:28,943 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 07:46:28,943 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 07:46:28,945 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 07:46:28,945 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 07:46:28,945 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 07:46:28,945 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 07:46:28,945 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 07:46:28,946 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 07:46:28,946 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 07:46:28,947 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 07:46:28,947 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 07:46:28,947 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 07:46:28,947 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 07:46:28,948 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 07:46:28,948 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 07:46:28,948 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 07:46:28,948 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 07:46:28,948 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 07:46:28,948 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 07:46:28,949 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 07:46:28,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 07:46:28,949 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 07:46:28,949 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 07:46:28,949 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 07:46:28,950 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 07:46:28,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 07:46:28,950 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 07:46:28,950 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 07:46:28,950 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 316221dba218ae429564ea6aa4d6c3cc1066683e [2021-08-26 07:46:29,290 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 07:46:29,323 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 07:46:29,326 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 07:46:29,327 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 07:46:29,328 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 07:46:29,329 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_valuebound5.c [2021-08-26 07:46:29,390 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0f2a1067/d307a933dd554bd6bd522ad26e9cd3aa/FLAGacf4fe09e [2021-08-26 07:46:29,797 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 07:46:29,798 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_valuebound5.c [2021-08-26 07:46:29,804 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0f2a1067/d307a933dd554bd6bd522ad26e9cd3aa/FLAGacf4fe09e [2021-08-26 07:46:30,194 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0f2a1067/d307a933dd554bd6bd522ad26e9cd3aa [2021-08-26 07:46:30,199 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 07:46:30,200 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 07:46:30,202 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 07:46:30,202 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 07:46:30,205 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 07:46:30,206 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 07:46:30" (1/1) ... [2021-08-26 07:46:30,207 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5319597f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:46:30, skipping insertion in model container [2021-08-26 07:46:30,207 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 07:46:30" (1/1) ... [2021-08-26 07:46:30,213 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 07:46:30,229 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 07:46:30,331 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_valuebound5.c[524,537] [2021-08-26 07:46:30,346 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 07:46:30,355 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 07:46:30,407 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_valuebound5.c[524,537] [2021-08-26 07:46:30,418 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 07:46:30,431 INFO L208 MainTranslator]: Completed translation [2021-08-26 07:46:30,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:46:30 WrapperNode [2021-08-26 07:46:30,433 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 07:46:30,435 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 07:46:30,435 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 07:46:30,435 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 07:46:30,441 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:46:30" (1/1) ... [2021-08-26 07:46:30,447 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:46:30" (1/1) ... [2021-08-26 07:46:30,468 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 07:46:30,471 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 07:46:30,471 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 07:46:30,472 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 07:46:30,478 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:46:30" (1/1) ... [2021-08-26 07:46:30,478 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:46:30" (1/1) ... [2021-08-26 07:46:30,482 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:46:30" (1/1) ... [2021-08-26 07:46:30,482 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:46:30" (1/1) ... [2021-08-26 07:46:30,497 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:46:30" (1/1) ... [2021-08-26 07:46:30,503 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:46:30" (1/1) ... [2021-08-26 07:46:30,509 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:46:30" (1/1) ... [2021-08-26 07:46:30,515 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 07:46:30,516 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 07:46:30,517 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 07:46:30,517 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 07:46:30,517 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:46:30" (1/1) ... [2021-08-26 07:46:30,523 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 07:46:30,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:46:30,540 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 07:46:30,564 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 07:46:30,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 07:46:30,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 07:46:30,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 07:46:30,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 07:46:30,901 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 07:46:30,901 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-08-26 07:46:30,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 07:46:30 BoogieIcfgContainer [2021-08-26 07:46:30,903 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 07:46:30,904 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 07:46:30,904 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 07:46:30,907 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 07:46:30,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 07:46:30" (1/3) ... [2021-08-26 07:46:30,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67452c49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 07:46:30, skipping insertion in model container [2021-08-26 07:46:30,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:46:30" (2/3) ... [2021-08-26 07:46:30,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67452c49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 07:46:30, skipping insertion in model container [2021-08-26 07:46:30,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 07:46:30" (3/3) ... [2021-08-26 07:46:30,924 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_valuebound5.c [2021-08-26 07:46:30,928 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 07:46:30,928 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-08-26 07:46:30,965 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 07:46:30,970 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 07:46:30,971 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-26 07:46:30,982 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 24 states have (on average 1.625) internal successors, (39), 27 states have internal predecessors, (39), 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 07:46:30,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-26 07:46:30,986 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:46:30,987 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:46:30,987 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:46:30,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:46:30,992 INFO L82 PathProgramCache]: Analyzing trace with hash 330581779, now seen corresponding path program 1 times [2021-08-26 07:46:30,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:46:31,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366324638] [2021-08-26 07:46:31,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:46:31,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:46:31,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:46:31,160 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 07:46:31,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:46:31,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366324638] [2021-08-26 07:46:31,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366324638] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:46:31,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:46:31,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 07:46:31,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076033334] [2021-08-26 07:46:31,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 07:46:31,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:46:31,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 07:46:31,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 07:46:31,202 INFO L87 Difference]: Start difference. First operand has 28 states, 24 states have (on average 1.625) internal successors, (39), 27 states have internal predecessors, (39), 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 5.5) internal successors, (11), 2 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 07:46:31,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:46:31,218 INFO L93 Difference]: Finished difference Result 53 states and 74 transitions. [2021-08-26 07:46:31,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 07:46:31,219 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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 07:46:31,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:46:31,228 INFO L225 Difference]: With dead ends: 53 [2021-08-26 07:46:31,228 INFO L226 Difference]: Without dead ends: 24 [2021-08-26 07:46:31,231 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 07:46:31,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-08-26 07:46:31,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-08-26 07:46:31,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:46:31,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-08-26 07:46:31,263 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 11 [2021-08-26 07:46:31,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:46:31,264 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-08-26 07:46:31,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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 07:46:31,265 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-08-26 07:46:31,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-26 07:46:31,266 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:46:31,266 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:46:31,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 07:46:31,267 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 07:46:31,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:46:31,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1507472743, now seen corresponding path program 1 times [2021-08-26 07:46:31,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:46:31,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190034734] [2021-08-26 07:46:31,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:46:31,271 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:46:31,304 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:46:31,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2019126771] [2021-08-26 07:46:31,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:46:31,307 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:46:31,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:46:31,313 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 07:46:31,351 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 07:46:31,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:46:31,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-26 07:46:31,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:46:31,610 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 07:46:31,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:46:31,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190034734] [2021-08-26 07:46:31,611 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:46:31,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019126771] [2021-08-26 07:46:31,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019126771] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:46:31,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:46:31,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 07:46:31,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843888546] [2021-08-26 07:46:31,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 07:46:31,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:46:31,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 07:46:31,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 07:46:31,622 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 07:46:31,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:46:31,714 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2021-08-26 07:46:31,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 07:46:31,715 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 07:46:31,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:46:31,717 INFO L225 Difference]: With dead ends: 41 [2021-08-26 07:46:31,718 INFO L226 Difference]: Without dead ends: 39 [2021-08-26 07:46:31,719 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 07:46:31,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-26 07:46:31,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2021-08-26 07:46:31,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 25 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 07:46:31,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-08-26 07:46:31,728 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 11 [2021-08-26 07:46:31,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:46:31,729 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-08-26 07:46:31,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 07:46:31,730 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-08-26 07:46:31,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-26 07:46:31,730 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:46:31,730 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:46:31,765 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 07:46:31,953 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 07:46:31,953 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 07:46:31,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:46:31,954 INFO L82 PathProgramCache]: Analyzing trace with hash -937517175, now seen corresponding path program 1 times [2021-08-26 07:46:31,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:46:31,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788467670] [2021-08-26 07:46:31,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:46:31,954 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:46:31,971 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:46:31,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [366909146] [2021-08-26 07:46:31,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:46:31,974 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:46:31,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:46:31,975 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 07:46:32,006 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 07:46:32,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:46:32,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-26 07:46:32,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:46:32,869 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 07:46:32,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:46:32,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788467670] [2021-08-26 07:46:32,870 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:46:32,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366909146] [2021-08-26 07:46:32,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366909146] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:46:32,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:46:32,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-08-26 07:46:32,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752802253] [2021-08-26 07:46:32,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-26 07:46:32,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:46:32,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-26 07:46:32,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-08-26 07:46:32,873 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 13 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 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 07:46:37,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:46:37,083 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2021-08-26 07:46:37,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-26 07:46:37,084 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 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 14 [2021-08-26 07:46:37,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:46:37,085 INFO L225 Difference]: With dead ends: 39 [2021-08-26 07:46:37,085 INFO L226 Difference]: Without dead ends: 37 [2021-08-26 07:46:37,086 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1623.7ms TimeCoverageRelationStatistics Valid=160, Invalid=302, Unknown=0, NotChecked=0, Total=462 [2021-08-26 07:46:37,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-08-26 07:46:37,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2021-08-26 07:46:37,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 28 states have internal predecessors, (33), 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 07:46:37,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-08-26 07:46:37,090 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 14 [2021-08-26 07:46:37,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:46:37,090 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-08-26 07:46:37,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 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 07:46:37,091 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-08-26 07:46:37,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-26 07:46:37,091 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:46:37,092 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:46:37,119 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 07:46:37,316 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 07:46:37,317 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:46:37,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:46:37,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1003041614, now seen corresponding path program 1 times [2021-08-26 07:46:37,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:46:37,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999065822] [2021-08-26 07:46:37,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:46:37,318 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:46:37,331 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:46:37,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1012293369] [2021-08-26 07:46:37,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:46:37,337 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:46:37,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:46:37,338 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 07:46:37,351 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 07:46:37,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:46:37,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-26 07:46:37,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:46:38,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:46:38,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:46:38,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999065822] [2021-08-26 07:46:38,823 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:46:38,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012293369] [2021-08-26 07:46:38,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012293369] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:46:38,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:46:38,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-08-26 07:46:38,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722170867] [2021-08-26 07:46:38,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-26 07:46:38,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:46:38,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-26 07:46:38,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-26 07:46:38,824 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 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 07:46:39,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:46:39,461 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2021-08-26 07:46:39,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-26 07:46:39,463 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 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 15 [2021-08-26 07:46:39,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:46:39,464 INFO L225 Difference]: With dead ends: 53 [2021-08-26 07:46:39,464 INFO L226 Difference]: Without dead ends: 51 [2021-08-26 07:46:39,465 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 412.0ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-08-26 07:46:39,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-08-26 07:46:39,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2021-08-26 07:46:39,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 31 states have internal predecessors, (37), 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 07:46:39,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-08-26 07:46:39,470 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 15 [2021-08-26 07:46:39,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:46:39,470 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-08-26 07:46:39,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 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 07:46:39,471 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-08-26 07:46:39,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-26 07:46:39,471 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:46:39,472 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:46:39,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-26 07:46:39,695 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 07:46:39,696 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 07:46:39,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:46:39,697 INFO L82 PathProgramCache]: Analyzing trace with hash 989284300, now seen corresponding path program 1 times [2021-08-26 07:46:39,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:46:39,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958134893] [2021-08-26 07:46:39,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:46:39,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:46:39,709 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:46:39,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1346079450] [2021-08-26 07:46:39,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:46:39,710 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:46:39,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:46:39,711 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 07:46:39,728 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 07:46:39,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:46:39,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-26 07:46:39,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:46:39,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:46:39,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:46:39,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958134893] [2021-08-26 07:46:39,961 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:46:39,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346079450] [2021-08-26 07:46:39,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346079450] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:46:39,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:46:39,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-26 07:46:39,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755651428] [2021-08-26 07:46:39,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 07:46:39,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:46:39,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 07:46:39,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-26 07:46:39,963 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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 07:46:40,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:46:40,103 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2021-08-26 07:46:40,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 07:46:40,109 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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 16 [2021-08-26 07:46:40,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:46:40,110 INFO L225 Difference]: With dead ends: 48 [2021-08-26 07:46:40,110 INFO L226 Difference]: Without dead ends: 42 [2021-08-26 07:46:40,110 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 100.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-26 07:46:40,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-08-26 07:46:40,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2021-08-26 07:46:40,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 36 states have internal predecessors, (45), 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 07:46:40,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2021-08-26 07:46:40,126 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 16 [2021-08-26 07:46:40,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:46:40,127 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2021-08-26 07:46:40,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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 07:46:40,127 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2021-08-26 07:46:40,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-26 07:46:40,128 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:46:40,128 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:46:40,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-26 07:46:40,352 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 07:46:40,353 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 07:46:40,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:46:40,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1032048289, now seen corresponding path program 1 times [2021-08-26 07:46:40,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:46:40,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702599656] [2021-08-26 07:46:40,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:46:40,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:46:40,366 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:46:40,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2145474574] [2021-08-26 07:46:40,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:46:40,367 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:46:40,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:46:40,371 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 07:46:40,375 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 07:46:40,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:46:40,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-26 07:46:40,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:46:40,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:46:40,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:46:40,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702599656] [2021-08-26 07:46:40,729 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:46:40,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145474574] [2021-08-26 07:46:40,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145474574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:46:40,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:46:40,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-08-26 07:46:40,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026107392] [2021-08-26 07:46:40,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 07:46:40,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:46:40,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 07:46:40,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-26 07:46:40,731 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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 07:46:40,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:46:40,890 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2021-08-26 07:46:40,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 07:46:40,891 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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 16 [2021-08-26 07:46:40,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:46:40,891 INFO L225 Difference]: With dead ends: 53 [2021-08-26 07:46:40,892 INFO L226 Difference]: Without dead ends: 51 [2021-08-26 07:46:40,892 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-26 07:46:40,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-08-26 07:46:40,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2021-08-26 07:46:40,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 37 states have internal predecessors, (47), 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 07:46:40,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2021-08-26 07:46:40,897 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 16 [2021-08-26 07:46:40,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:46:40,897 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2021-08-26 07:46:40,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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 07:46:40,897 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2021-08-26 07:46:40,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-26 07:46:40,898 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:46:40,898 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:46:40,920 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 07:46:41,112 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 07:46:41,113 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:46:41,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:46:41,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1931404169, now seen corresponding path program 1 times [2021-08-26 07:46:41,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:46:41,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098244581] [2021-08-26 07:46:41,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:46:41,114 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:46:41,128 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:46:41,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1264767761] [2021-08-26 07:46:41,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:46:41,129 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:46:41,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:46:41,130 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 07:46:41,132 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 07:46:41,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:46:41,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-26 07:46:41,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:46:41,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:46:41,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:46:41,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098244581] [2021-08-26 07:46:41,473 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:46:41,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264767761] [2021-08-26 07:46:41,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264767761] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:46:41,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:46:41,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-08-26 07:46:41,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800630740] [2021-08-26 07:46:41,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 07:46:41,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:46:41,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 07:46:41,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 07:46:41,475 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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) [2021-08-26 07:46:41,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:46:41,736 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2021-08-26 07:46:41,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 07:46:41,738 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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) Word has length 17 [2021-08-26 07:46:41,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:46:41,739 INFO L225 Difference]: With dead ends: 70 [2021-08-26 07:46:41,739 INFO L226 Difference]: Without dead ends: 54 [2021-08-26 07:46:41,739 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 43.0ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-26 07:46:41,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-26 07:46:41,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 44. [2021-08-26 07:46:41,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 43 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:46:41,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2021-08-26 07:46:41,745 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 17 [2021-08-26 07:46:41,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:46:41,745 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2021-08-26 07:46:41,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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) [2021-08-26 07:46:41,745 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2021-08-26 07:46:41,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-26 07:46:41,746 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:46:41,746 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:46:41,784 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 07:46:41,970 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 07:46:41,970 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:46:41,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:46:41,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1931463751, now seen corresponding path program 1 times [2021-08-26 07:46:41,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:46:41,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335804205] [2021-08-26 07:46:41,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:46:41,971 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:46:41,982 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:46:41,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2107045963] [2021-08-26 07:46:41,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:46:41,983 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:46:41,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:46:41,988 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) [2021-08-26 07:46:41,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-26 07:46:42,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:46:42,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-26 07:46:42,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:46:42,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:46:42,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:46:42,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335804205] [2021-08-26 07:46:42,359 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:46:42,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107045963] [2021-08-26 07:46:42,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107045963] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:46:42,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:46:42,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-08-26 07:46:42,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437596559] [2021-08-26 07:46:42,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 07:46:42,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:46:42,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 07:46:42,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-26 07:46:42,362 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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) [2021-08-26 07:46:42,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:46:42,584 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2021-08-26 07:46:42,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 07:46:42,585 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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) Word has length 17 [2021-08-26 07:46:42,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:46:42,585 INFO L225 Difference]: With dead ends: 61 [2021-08-26 07:46:42,585 INFO L226 Difference]: Without dead ends: 59 [2021-08-26 07:46:42,586 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 43.6ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-26 07:46:42,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-26 07:46:42,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 46. [2021-08-26 07:46:42,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 45 states have internal predecessors, (58), 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 07:46:42,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2021-08-26 07:46:42,593 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 17 [2021-08-26 07:46:42,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:46:42,593 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2021-08-26 07:46:42,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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) [2021-08-26 07:46:42,593 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2021-08-26 07:46:42,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-26 07:46:42,594 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:46:42,594 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:46:42,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-26 07:46:42,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:46:42,801 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:46:42,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:46:42,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1530166964, now seen corresponding path program 1 times [2021-08-26 07:46:42,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:46:42,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490877777] [2021-08-26 07:46:42,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:46:42,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:46:42,809 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:46:42,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [338009795] [2021-08-26 07:46:42,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:46:42,810 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:46:42,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:46:42,811 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:46:42,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-26 07:46:42,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:46:42,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-26 07:46:42,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:46:43,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:46:43,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:46:43,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490877777] [2021-08-26 07:46:43,185 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:46:43,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338009795] [2021-08-26 07:46:43,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338009795] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:46:43,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:46:43,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-26 07:46:43,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440444644] [2021-08-26 07:46:43,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 07:46:43,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:46:43,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 07:46:43,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-26 07:46:43,187 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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 07:46:43,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:46:43,274 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2021-08-26 07:46:43,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 07:46:43,275 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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 18 [2021-08-26 07:46:43,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:46:43,275 INFO L225 Difference]: With dead ends: 66 [2021-08-26 07:46:43,276 INFO L226 Difference]: Without dead ends: 56 [2021-08-26 07:46:43,276 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 72.8ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-26 07:46:43,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-08-26 07:46:43,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2021-08-26 07:46:43,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 51 states have (on average 1.3333333333333333) internal successors, (68), 53 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:46:43,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2021-08-26 07:46:43,282 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 18 [2021-08-26 07:46:43,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:46:43,283 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2021-08-26 07:46:43,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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 07:46:43,283 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2021-08-26 07:46:43,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-26 07:46:43,284 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:46:43,284 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:46:43,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-26 07:46:43,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-08-26 07:46:43,497 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:46:43,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:46:43,497 INFO L82 PathProgramCache]: Analyzing trace with hash 191838595, now seen corresponding path program 2 times [2021-08-26 07:46:43,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:46:43,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081945048] [2021-08-26 07:46:43,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:46:43,498 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:46:43,507 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:46:43,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1281282093] [2021-08-26 07:46:43,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 07:46:43,508 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:46:43,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:46:43,509 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:46:43,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-26 07:46:43,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 07:46:43,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 07:46:43,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-26 07:46:43,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:46:50,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:46:50,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:46:50,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081945048] [2021-08-26 07:46:50,239 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:46:50,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281282093] [2021-08-26 07:46:50,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281282093] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:46:50,239 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:46:50,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-08-26 07:46:50,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296757718] [2021-08-26 07:46:50,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-26 07:46:50,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:46:50,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-26 07:46:50,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-26 07:46:50,241 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 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) [2021-08-26 07:46:51,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:46:51,070 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2021-08-26 07:46:51,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-26 07:46:51,071 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 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) Word has length 19 [2021-08-26 07:46:51,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:46:51,071 INFO L225 Difference]: With dead ends: 69 [2021-08-26 07:46:51,071 INFO L226 Difference]: Without dead ends: 67 [2021-08-26 07:46:51,072 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 506.8ms TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-08-26 07:46:51,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-08-26 07:46:51,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 58. [2021-08-26 07:46:51,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 55 states have (on average 1.3272727272727274) internal successors, (73), 57 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:46:51,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2021-08-26 07:46:51,077 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 19 [2021-08-26 07:46:51,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:46:51,077 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2021-08-26 07:46:51,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 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) [2021-08-26 07:46:51,078 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2021-08-26 07:46:51,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-26 07:46:51,078 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:46:51,079 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:46:51,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-26 07:46:51,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-26 07:46:51,289 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:46:51,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:46:51,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1915371903, now seen corresponding path program 1 times [2021-08-26 07:46:51,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:46:51,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397355477] [2021-08-26 07:46:51,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:46:51,290 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:46:51,301 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:46:51,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [558293157] [2021-08-26 07:46:51,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:46:51,301 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:46:51,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:46:51,302 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:46:51,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-26 07:46:51,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:46:51,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-26 07:46:51,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:46:51,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:46:51,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:46:51,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397355477] [2021-08-26 07:46:51,773 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:46:51,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558293157] [2021-08-26 07:46:51,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558293157] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:46:51,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:46:51,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-26 07:46:51,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014975430] [2021-08-26 07:46:51,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 07:46:51,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:46:51,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 07:46:51,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-26 07:46:51,775 INFO L87 Difference]: Start difference. First operand 58 states and 73 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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) [2021-08-26 07:46:56,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:46:56,614 INFO L93 Difference]: Finished difference Result 77 states and 95 transitions. [2021-08-26 07:46:56,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 07:46:56,614 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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) Word has length 19 [2021-08-26 07:46:56,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:46:56,615 INFO L225 Difference]: With dead ends: 77 [2021-08-26 07:46:56,615 INFO L226 Difference]: Without dead ends: 73 [2021-08-26 07:46:56,615 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 170.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-26 07:46:56,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-08-26 07:46:56,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 56. [2021-08-26 07:46:56,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 53 states have (on average 1.3396226415094339) internal successors, (71), 55 states have internal predecessors, (71), 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 07:46:56,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 71 transitions. [2021-08-26 07:46:56,622 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 71 transitions. Word has length 19 [2021-08-26 07:46:56,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:46:56,622 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 71 transitions. [2021-08-26 07:46:56,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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) [2021-08-26 07:46:56,622 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 71 transitions. [2021-08-26 07:46:56,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-26 07:46:56,623 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:46:56,623 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:46:56,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-26 07:46:56,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-26 07:46:56,845 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:46:56,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:46:56,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1654558476, now seen corresponding path program 1 times [2021-08-26 07:46:56,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:46:56,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410875162] [2021-08-26 07:46:56,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:46:56,846 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:46:56,867 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:46:56,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1504153757] [2021-08-26 07:46:56,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:46:56,872 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:46:56,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:46:56,885 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:46:56,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-26 07:46:57,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:46:57,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-26 07:46:57,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:47:03,519 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:47:03,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:47:03,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410875162] [2021-08-26 07:47:03,520 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:47:03,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504153757] [2021-08-26 07:47:03,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504153757] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:47:03,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:47:03,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-08-26 07:47:03,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621706204] [2021-08-26 07:47:03,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-26 07:47:03,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:47:03,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-26 07:47:03,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-26 07:47:03,522 INFO L87 Difference]: Start difference. First operand 56 states and 71 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 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 07:47:09,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:47:09,370 INFO L93 Difference]: Finished difference Result 92 states and 119 transitions. [2021-08-26 07:47:09,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-26 07:47:09,370 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 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 20 [2021-08-26 07:47:09,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:47:09,371 INFO L225 Difference]: With dead ends: 92 [2021-08-26 07:47:09,371 INFO L226 Difference]: Without dead ends: 60 [2021-08-26 07:47:09,371 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 7652.4ms TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2021-08-26 07:47:09,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-26 07:47:09,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2021-08-26 07:47:09,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 53 states have (on average 1.3396226415094339) internal successors, (71), 55 states have internal predecessors, (71), 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 07:47:09,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 71 transitions. [2021-08-26 07:47:09,380 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 71 transitions. Word has length 20 [2021-08-26 07:47:09,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:47:09,380 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 71 transitions. [2021-08-26 07:47:09,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 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 07:47:09,380 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 71 transitions. [2021-08-26 07:47:09,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-26 07:47:09,381 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:47:09,381 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:47:09,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-26 07:47:09,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-26 07:47:09,589 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:47:09,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:47:09,589 INFO L82 PathProgramCache]: Analyzing trace with hash 754316118, now seen corresponding path program 2 times [2021-08-26 07:47:09,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:47:09,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715073707] [2021-08-26 07:47:09,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:47:09,590 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:47:09,596 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:47:09,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1001645681] [2021-08-26 07:47:09,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 07:47:09,596 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:47:09,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:47:09,617 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:47:09,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-26 07:47:09,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 07:47:09,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 07:47:09,960 WARN L261 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-26 07:47:09,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:47:11,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:47:11,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:47:11,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715073707] [2021-08-26 07:47:11,207 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:47:11,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001645681] [2021-08-26 07:47:11,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001645681] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:47:11,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:47:11,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-08-26 07:47:11,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567848723] [2021-08-26 07:47:11,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-26 07:47:11,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:47:11,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-26 07:47:11,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-08-26 07:47:11,209 INFO L87 Difference]: Start difference. First operand 56 states and 71 transitions. Second operand has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 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 07:47:12,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:47:12,392 INFO L93 Difference]: Finished difference Result 97 states and 126 transitions. [2021-08-26 07:47:12,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-26 07:47:12,394 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 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 20 [2021-08-26 07:47:12,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:47:12,395 INFO L225 Difference]: With dead ends: 97 [2021-08-26 07:47:12,395 INFO L226 Difference]: Without dead ends: 68 [2021-08-26 07:47:12,395 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1367.4ms TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2021-08-26 07:47:12,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-08-26 07:47:12,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2021-08-26 07:47:12,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 57 states have (on average 1.3157894736842106) internal successors, (75), 59 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) [2021-08-26 07:47:12,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 75 transitions. [2021-08-26 07:47:12,402 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 75 transitions. Word has length 20 [2021-08-26 07:47:12,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:47:12,402 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 75 transitions. [2021-08-26 07:47:12,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 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 07:47:12,403 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 75 transitions. [2021-08-26 07:47:12,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-26 07:47:12,403 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:47:12,403 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:47:12,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-26 07:47:12,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-26 07:47:12,624 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:47:12,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:47:12,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1210343271, now seen corresponding path program 1 times [2021-08-26 07:47:12,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:47:12,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483672858] [2021-08-26 07:47:12,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:47:12,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:47:12,638 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:47:12,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [362238338] [2021-08-26 07:47:12,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:47:12,638 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:47:12,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:47:12,639 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:47:12,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-26 07:47:13,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:47:13,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-26 07:47:13,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:47:13,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:47:13,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:47:13,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483672858] [2021-08-26 07:47:13,210 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:47:13,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362238338] [2021-08-26 07:47:13,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362238338] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:47:13,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:47:13,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-26 07:47:13,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791577307] [2021-08-26 07:47:13,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 07:47:13,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:47:13,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 07:47:13,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-26 07:47:13,212 INFO L87 Difference]: Start difference. First operand 60 states and 75 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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 07:47:17,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:47:17,985 INFO L93 Difference]: Finished difference Result 88 states and 109 transitions. [2021-08-26 07:47:17,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 07:47:17,985 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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 20 [2021-08-26 07:47:17,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:47:17,986 INFO L225 Difference]: With dead ends: 88 [2021-08-26 07:47:17,986 INFO L226 Difference]: Without dead ends: 86 [2021-08-26 07:47:17,986 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 206.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-26 07:47:17,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-08-26 07:47:17,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 60. [2021-08-26 07:47:17,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 57 states have (on average 1.3157894736842106) internal successors, (75), 59 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) [2021-08-26 07:47:17,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 75 transitions. [2021-08-26 07:47:17,992 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 75 transitions. Word has length 20 [2021-08-26 07:47:17,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:47:17,993 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 75 transitions. [2021-08-26 07:47:17,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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 07:47:17,993 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 75 transitions. [2021-08-26 07:47:17,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-26 07:47:17,993 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:47:17,993 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:47:18,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-08-26 07:47:18,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-26 07:47:18,197 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:47:18,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:47:18,197 INFO L82 PathProgramCache]: Analyzing trace with hash 564664091, now seen corresponding path program 1 times [2021-08-26 07:47:18,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:47:18,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501147503] [2021-08-26 07:47:18,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:47:18,198 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:47:18,203 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:47:18,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [729369396] [2021-08-26 07:47:18,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:47:18,206 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:47:18,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:47:18,207 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:47:18,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-26 07:47:18,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:47:18,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-26 07:47:18,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:47:19,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:47:19,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:47:19,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501147503] [2021-08-26 07:47:19,457 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:47:19,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729369396] [2021-08-26 07:47:19,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729369396] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:47:19,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:47:19,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-08-26 07:47:19,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231141958] [2021-08-26 07:47:19,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-26 07:47:19,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:47:19,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-26 07:47:19,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-26 07:47:19,459 INFO L87 Difference]: Start difference. First operand 60 states and 75 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 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 07:47:28,147 WARN L207 SmtUtils]: Spent 7.92 s on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2021-08-26 07:47:46,491 WARN L207 SmtUtils]: Spent 18.28 s on a formula simplification. DAG size of input: 67 DAG size of output: 41 [2021-08-26 07:47:59,449 WARN L207 SmtUtils]: Spent 12.86 s on a formula simplification. DAG size of input: 67 DAG size of output: 41 [2021-08-26 07:48:20,841 WARN L207 SmtUtils]: Spent 18.34 s on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2021-08-26 07:48:21,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:48:21,416 INFO L93 Difference]: Finished difference Result 79 states and 97 transitions. [2021-08-26 07:48:21,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-26 07:48:21,417 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 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 20 [2021-08-26 07:48:21,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:48:21,417 INFO L225 Difference]: With dead ends: 79 [2021-08-26 07:48:21,417 INFO L226 Difference]: Without dead ends: 69 [2021-08-26 07:48:21,418 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 58787.4ms TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2021-08-26 07:48:21,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-08-26 07:48:21,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2021-08-26 07:48:21,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 57 states have (on average 1.2982456140350878) internal successors, (74), 59 states have internal predecessors, (74), 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 07:48:21,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2021-08-26 07:48:21,426 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 20 [2021-08-26 07:48:21,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:48:21,426 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2021-08-26 07:48:21,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 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 07:48:21,427 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2021-08-26 07:48:21,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-26 07:48:21,431 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:48:21,431 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:48:21,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-26 07:48:21,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:48:21,646 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:48:21,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:48:21,646 INFO L82 PathProgramCache]: Analyzing trace with hash -245616514, now seen corresponding path program 1 times [2021-08-26 07:48:21,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:48:21,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436743415] [2021-08-26 07:48:21,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:48:21,647 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:48:21,655 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:48:21,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1801797608] [2021-08-26 07:48:21,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:48:21,656 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:48:21,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:48:21,663 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:48:21,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-26 07:48:22,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:48:22,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-26 07:48:22,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:48:23,132 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:48:23,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:48:23,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436743415] [2021-08-26 07:48:23,133 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:48:23,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801797608] [2021-08-26 07:48:23,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801797608] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:48:23,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:48:23,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-08-26 07:48:23,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379908770] [2021-08-26 07:48:23,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-26 07:48:23,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:48:23,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-26 07:48:23,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-26 07:48:23,135 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 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 07:48:24,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:48:24,061 INFO L93 Difference]: Finished difference Result 80 states and 98 transitions. [2021-08-26 07:48:24,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-26 07:48:24,062 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 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 [2021-08-26 07:48:24,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:48:24,062 INFO L225 Difference]: With dead ends: 80 [2021-08-26 07:48:24,063 INFO L226 Difference]: Without dead ends: 78 [2021-08-26 07:48:24,063 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 492.6ms TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-08-26 07:48:24,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-08-26 07:48:24,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 64. [2021-08-26 07:48:24,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 61 states have (on average 1.2950819672131149) internal successors, (79), 63 states have internal predecessors, (79), 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 07:48:24,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2021-08-26 07:48:24,068 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 21 [2021-08-26 07:48:24,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:48:24,069 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2021-08-26 07:48:24,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 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 07:48:24,069 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2021-08-26 07:48:24,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-26 07:48:24,069 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:48:24,069 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:48:24,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-26 07:48:24,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-26 07:48:24,270 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:48:24,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:48:24,270 INFO L82 PathProgramCache]: Analyzing trace with hash -245556932, now seen corresponding path program 1 times [2021-08-26 07:48:24,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:48:24,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054767312] [2021-08-26 07:48:24,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:48:24,270 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:48:24,277 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:48:24,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [234236082] [2021-08-26 07:48:24,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:48:24,278 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:48:24,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:48:24,279 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:48:24,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-26 07:48:24,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:48:24,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-26 07:48:24,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:48:27,749 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:48:27,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:48:27,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054767312] [2021-08-26 07:48:27,749 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:48:27,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234236082] [2021-08-26 07:48:27,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234236082] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:48:27,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:48:27,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-08-26 07:48:27,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106516952] [2021-08-26 07:48:27,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-26 07:48:27,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:48:27,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-26 07:48:27,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-26 07:48:27,751 INFO L87 Difference]: Start difference. First operand 64 states and 79 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 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 07:48:33,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:48:33,823 INFO L93 Difference]: Finished difference Result 84 states and 102 transitions. [2021-08-26 07:48:33,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-26 07:48:33,823 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 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 [2021-08-26 07:48:33,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:48:33,823 INFO L225 Difference]: With dead ends: 84 [2021-08-26 07:48:33,823 INFO L226 Difference]: Without dead ends: 82 [2021-08-26 07:48:33,824 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 5163.8ms TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2021-08-26 07:48:33,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-08-26 07:48:33,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 66. [2021-08-26 07:48:33,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 63 states have (on average 1.2857142857142858) internal successors, (81), 65 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:48:33,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2021-08-26 07:48:33,829 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 21 [2021-08-26 07:48:33,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:48:33,829 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2021-08-26 07:48:33,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 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 07:48:33,830 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2021-08-26 07:48:33,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-26 07:48:33,830 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:48:33,830 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:48:33,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-26 07:48:34,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-26 07:48:34,031 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:48:34,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:48:34,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1135367230, now seen corresponding path program 2 times [2021-08-26 07:48:34,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:48:34,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350339069] [2021-08-26 07:48:34,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:48:34,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:48:34,042 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:48:34,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1527545565] [2021-08-26 07:48:34,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 07:48:34,042 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:48:34,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:48:34,043 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:48:34,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-26 07:48:34,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 07:48:34,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 07:48:34,560 WARN L261 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 54 conjunts are in the unsatisfiable core [2021-08-26 07:48:34,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:48:35,420 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:48:35,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:48:35,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350339069] [2021-08-26 07:48:35,421 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:48:35,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527545565] [2021-08-26 07:48:35,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527545565] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:48:35,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:48:35,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-08-26 07:48:35,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756270278] [2021-08-26 07:48:35,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-26 07:48:35,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:48:35,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-26 07:48:35,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-08-26 07:48:35,423 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 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 07:48:36,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:48:36,134 INFO L93 Difference]: Finished difference Result 78 states and 97 transitions. [2021-08-26 07:48:36,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-26 07:48:36,134 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 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 [2021-08-26 07:48:36,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:48:36,134 INFO L225 Difference]: With dead ends: 78 [2021-08-26 07:48:36,135 INFO L226 Difference]: Without dead ends: 76 [2021-08-26 07:48:36,135 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 693.3ms TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2021-08-26 07:48:36,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-08-26 07:48:36,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 66. [2021-08-26 07:48:36,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 63 states have (on average 1.2857142857142858) internal successors, (81), 65 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:48:36,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2021-08-26 07:48:36,142 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 21 [2021-08-26 07:48:36,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:48:36,143 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2021-08-26 07:48:36,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 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 07:48:36,143 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2021-08-26 07:48:36,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-26 07:48:36,143 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:48:36,143 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:48:36,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-26 07:48:36,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-26 07:48:36,361 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:48:36,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:48:36,361 INFO L82 PathProgramCache]: Analyzing trace with hash 326020604, now seen corresponding path program 2 times [2021-08-26 07:48:36,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:48:36,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83795498] [2021-08-26 07:48:36,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:48:36,361 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:48:36,372 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:48:36,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [734660355] [2021-08-26 07:48:36,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 07:48:36,373 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:48:36,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:48:36,374 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:48:36,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-26 07:48:36,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 07:48:36,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 07:48:36,994 WARN L261 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-26 07:48:36,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:48:37,942 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:48:37,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:48:37,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83795498] [2021-08-26 07:48:37,942 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:48:37,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734660355] [2021-08-26 07:48:37,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734660355] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:48:37,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:48:37,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-08-26 07:48:37,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679478205] [2021-08-26 07:48:37,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-26 07:48:37,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:48:37,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-26 07:48:37,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-08-26 07:48:37,944 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand has 16 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 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 07:48:38,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:48:38,765 INFO L93 Difference]: Finished difference Result 83 states and 104 transitions. [2021-08-26 07:48:38,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-26 07:48:38,766 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 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 [2021-08-26 07:48:38,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:48:38,766 INFO L225 Difference]: With dead ends: 83 [2021-08-26 07:48:38,766 INFO L226 Difference]: Without dead ends: 81 [2021-08-26 07:48:38,767 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 803.3ms TimeCoverageRelationStatistics Valid=187, Invalid=463, Unknown=0, NotChecked=0, Total=650 [2021-08-26 07:48:38,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-26 07:48:38,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 70. [2021-08-26 07:48:38,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 67 states have (on average 1.2835820895522387) internal successors, (86), 69 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:48:38,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 86 transitions. [2021-08-26 07:48:38,775 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 86 transitions. Word has length 21 [2021-08-26 07:48:38,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:48:38,775 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 86 transitions. [2021-08-26 07:48:38,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 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 07:48:38,776 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 86 transitions. [2021-08-26 07:48:38,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-26 07:48:38,776 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:48:38,776 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:48:38,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-26 07:48:38,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:48:38,997 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:48:38,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:48:38,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1519233459, now seen corresponding path program 1 times [2021-08-26 07:48:38,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:48:38,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132579819] [2021-08-26 07:48:38,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:48:38,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:48:39,012 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:48:39,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1200542801] [2021-08-26 07:48:39,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:48:39,013 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:48:39,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:48:39,014 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:48:39,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-26 07:48:39,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:48:39,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-26 07:48:39,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:48:39,843 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:48:39,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:48:39,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132579819] [2021-08-26 07:48:39,844 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:48:39,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200542801] [2021-08-26 07:48:39,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200542801] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:48:39,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:48:39,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-08-26 07:48:39,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026180530] [2021-08-26 07:48:39,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-26 07:48:39,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:48:39,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-26 07:48:39,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-26 07:48:39,846 INFO L87 Difference]: Start difference. First operand 70 states and 86 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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 07:48:40,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:48:40,202 INFO L93 Difference]: Finished difference Result 137 states and 168 transitions. [2021-08-26 07:48:40,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-26 07:48:40,203 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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 22 [2021-08-26 07:48:40,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:48:40,204 INFO L225 Difference]: With dead ends: 137 [2021-08-26 07:48:40,204 INFO L226 Difference]: Without dead ends: 108 [2021-08-26 07:48:40,204 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 301.1ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-08-26 07:48:40,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-08-26 07:48:40,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 77. [2021-08-26 07:48:40,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 74 states have (on average 1.3243243243243243) internal successors, (98), 76 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:48:40,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 98 transitions. [2021-08-26 07:48:40,214 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 98 transitions. Word has length 22 [2021-08-26 07:48:40,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:48:40,214 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 98 transitions. [2021-08-26 07:48:40,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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 07:48:40,215 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 98 transitions. [2021-08-26 07:48:40,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-26 07:48:40,215 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:48:40,215 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:48:40,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-26 07:48:40,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:48:40,429 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:48:40,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:48:40,429 INFO L82 PathProgramCache]: Analyzing trace with hash -275964616, now seen corresponding path program 3 times [2021-08-26 07:48:40,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:48:40,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425894207] [2021-08-26 07:48:40,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:48:40,430 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:48:40,436 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:48:40,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [699430860] [2021-08-26 07:48:40,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 07:48:40,436 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:48:40,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:48:40,438 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:48:40,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-26 07:48:41,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-26 07:48:41,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 07:48:41,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-26 07:48:41,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:48:41,358 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-26 07:48:41,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:48:41,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425894207] [2021-08-26 07:48:41,358 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:48:41,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699430860] [2021-08-26 07:48:41,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699430860] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:48:41,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:48:41,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-08-26 07:48:41,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136772559] [2021-08-26 07:48:41,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 07:48:41,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:48:41,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 07:48:41,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-26 07:48:41,360 INFO L87 Difference]: Start difference. First operand 77 states and 98 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 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) [2021-08-26 07:48:53,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:48:53,161 INFO L93 Difference]: Finished difference Result 86 states and 113 transitions. [2021-08-26 07:48:53,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 07:48:53,162 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 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) Word has length 23 [2021-08-26 07:48:53,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:48:53,162 INFO L225 Difference]: With dead ends: 86 [2021-08-26 07:48:53,162 INFO L226 Difference]: Without dead ends: 84 [2021-08-26 07:48:53,162 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 248.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-26 07:48:53,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-08-26 07:48:53,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 65. [2021-08-26 07:48:53,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 63 states have (on average 1.253968253968254) internal successors, (79), 64 states have internal predecessors, (79), 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 07:48:53,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 79 transitions. [2021-08-26 07:48:53,170 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 79 transitions. Word has length 23 [2021-08-26 07:48:53,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:48:53,170 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 79 transitions. [2021-08-26 07:48:53,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 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) [2021-08-26 07:48:53,170 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 79 transitions. [2021-08-26 07:48:53,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-26 07:48:53,171 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:48:53,171 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:48:53,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-26 07:48:53,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-08-26 07:48:53,373 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:48:53,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:48:53,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1052333562, now seen corresponding path program 1 times [2021-08-26 07:48:53,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:48:53,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832224751] [2021-08-26 07:48:53,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:48:53,378 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:48:53,385 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:48:53,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [302605398] [2021-08-26 07:48:53,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:48:53,386 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:48:53,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:48:53,389 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:48:53,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-26 07:48:53,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:48:53,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-26 07:48:53,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:48:56,359 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:48:56,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:48:56,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832224751] [2021-08-26 07:48:56,359 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:48:56,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302605398] [2021-08-26 07:48:56,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302605398] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:48:56,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:48:56,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-08-26 07:48:56,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868817937] [2021-08-26 07:48:56,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-26 07:48:56,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:48:56,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-26 07:48:56,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-08-26 07:48:56,361 INFO L87 Difference]: Start difference. First operand 65 states and 79 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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) [2021-08-26 07:48:59,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:48:59,861 INFO L93 Difference]: Finished difference Result 150 states and 185 transitions. [2021-08-26 07:48:59,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-26 07:48:59,863 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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) Word has length 24 [2021-08-26 07:48:59,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:48:59,864 INFO L225 Difference]: With dead ends: 150 [2021-08-26 07:48:59,864 INFO L226 Difference]: Without dead ends: 114 [2021-08-26 07:48:59,864 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2033.8ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-08-26 07:48:59,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-08-26 07:48:59,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 97. [2021-08-26 07:48:59,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 95 states have (on average 1.2736842105263158) internal successors, (121), 96 states have internal predecessors, (121), 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 07:48:59,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 121 transitions. [2021-08-26 07:48:59,876 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 121 transitions. Word has length 24 [2021-08-26 07:48:59,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:48:59,877 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 121 transitions. [2021-08-26 07:48:59,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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) [2021-08-26 07:48:59,877 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 121 transitions. [2021-08-26 07:48:59,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-26 07:48:59,877 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:48:59,878 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:48:59,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-26 07:49:00,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-26 07:49:00,082 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:49:00,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:49:00,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1639827719, now seen corresponding path program 1 times [2021-08-26 07:49:00,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:49:00,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198563537] [2021-08-26 07:49:00,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:49:00,082 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:49:00,089 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:49:00,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1526701876] [2021-08-26 07:49:00,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:49:00,089 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:49:00,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:49:00,090 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:49:00,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-26 07:49:00,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:49:00,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-26 07:49:00,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:49:00,968 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-26 07:49:00,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:49:00,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198563537] [2021-08-26 07:49:00,969 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:49:00,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526701876] [2021-08-26 07:49:00,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526701876] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:49:00,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:49:00,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-26 07:49:00,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334827387] [2021-08-26 07:49:00,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 07:49:00,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:49:00,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 07:49:00,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-26 07:49:00,974 INFO L87 Difference]: Start difference. First operand 97 states and 121 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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) [2021-08-26 07:49:01,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:49:01,105 INFO L93 Difference]: Finished difference Result 106 states and 130 transitions. [2021-08-26 07:49:01,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 07:49:01,105 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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) Word has length 26 [2021-08-26 07:49:01,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:49:01,106 INFO L225 Difference]: With dead ends: 106 [2021-08-26 07:49:01,106 INFO L226 Difference]: Without dead ends: 100 [2021-08-26 07:49:01,106 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 93.0ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-26 07:49:01,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-08-26 07:49:01,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2021-08-26 07:49:01,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 92 states have (on average 1.2608695652173914) internal successors, (116), 93 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:49:01,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions. [2021-08-26 07:49:01,119 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 26 [2021-08-26 07:49:01,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:49:01,119 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions. [2021-08-26 07:49:01,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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) [2021-08-26 07:49:01,120 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2021-08-26 07:49:01,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-26 07:49:01,120 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:49:01,120 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:49:01,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-08-26 07:49:01,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:49:01,330 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:49:01,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:49:01,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1002173397, now seen corresponding path program 1 times [2021-08-26 07:49:01,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:49:01,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118133395] [2021-08-26 07:49:01,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:49:01,331 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:49:01,341 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:49:01,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1892386940] [2021-08-26 07:49:01,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:49:01,342 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:49:01,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:49:01,346 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:49:01,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-26 07:49:02,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:49:02,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-26 07:49:02,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:49:02,268 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:49:02,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:49:02,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118133395] [2021-08-26 07:49:02,268 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:49:02,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892386940] [2021-08-26 07:49:02,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892386940] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:49:02,269 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:49:02,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-08-26 07:49:02,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934354604] [2021-08-26 07:49:02,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 07:49:02,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:49:02,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 07:49:02,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-26 07:49:02,270 INFO L87 Difference]: Start difference. First operand 94 states and 116 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 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 07:49:02,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:49:02,412 INFO L93 Difference]: Finished difference Result 161 states and 195 transitions. [2021-08-26 07:49:02,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-26 07:49:02,412 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 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 26 [2021-08-26 07:49:02,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:49:02,412 INFO L225 Difference]: With dead ends: 161 [2021-08-26 07:49:02,413 INFO L226 Difference]: Without dead ends: 128 [2021-08-26 07:49:02,413 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 99.0ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-26 07:49:02,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-08-26 07:49:02,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 101. [2021-08-26 07:49:02,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 99 states have (on average 1.2727272727272727) internal successors, (126), 100 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:49:02,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 126 transitions. [2021-08-26 07:49:02,426 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 126 transitions. Word has length 26 [2021-08-26 07:49:02,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:49:02,426 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 126 transitions. [2021-08-26 07:49:02,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 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 07:49:02,426 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 126 transitions. [2021-08-26 07:49:02,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-26 07:49:02,427 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:49:02,427 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:49:02,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-26 07:49:02,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:49:02,627 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:49:02,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:49:02,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1588979411, now seen corresponding path program 2 times [2021-08-26 07:49:02,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:49:02,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444346396] [2021-08-26 07:49:02,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:49:02,628 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:49:02,635 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:49:02,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1942400838] [2021-08-26 07:49:02,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 07:49:02,636 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:49:02,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:49:02,637 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:49:02,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-26 07:49:03,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-26 07:49:03,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 07:49:03,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-26 07:49:03,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:49:03,767 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-26 07:49:03,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:49:03,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444346396] [2021-08-26 07:49:03,767 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:49:03,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942400838] [2021-08-26 07:49:03,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942400838] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:49:03,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:49:03,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-26 07:49:03,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759833965] [2021-08-26 07:49:03,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 07:49:03,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:49:03,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 07:49:03,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-26 07:49:03,769 INFO L87 Difference]: Start difference. First operand 101 states and 126 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 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 07:49:10,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:49:10,430 INFO L93 Difference]: Finished difference Result 101 states and 126 transitions. [2021-08-26 07:49:10,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-26 07:49:10,430 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 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 26 [2021-08-26 07:49:10,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:49:10,431 INFO L225 Difference]: With dead ends: 101 [2021-08-26 07:49:10,431 INFO L226 Difference]: Without dead ends: 99 [2021-08-26 07:49:10,432 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 489.3ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-08-26 07:49:10,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-08-26 07:49:10,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2021-08-26 07:49:10,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.2708333333333333) internal successors, (122), 96 states have internal predecessors, (122), 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 07:49:10,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 122 transitions. [2021-08-26 07:49:10,444 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 122 transitions. Word has length 26 [2021-08-26 07:49:10,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:49:10,444 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 122 transitions. [2021-08-26 07:49:10,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 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 07:49:10,444 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 122 transitions. [2021-08-26 07:49:10,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-26 07:49:10,445 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:49:10,445 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:49:10,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-26 07:49:10,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-08-26 07:49:10,645 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:49:10,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:49:10,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1999300720, now seen corresponding path program 1 times [2021-08-26 07:49:10,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:49:10,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662765514] [2021-08-26 07:49:10,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:49:10,646 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:49:10,653 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:49:10,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [261470768] [2021-08-26 07:49:10,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:49:10,654 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:49:10,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:49:10,655 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:49:10,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-26 07:49:11,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:49:11,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-26 07:49:11,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:49:11,832 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:49:11,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:49:11,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662765514] [2021-08-26 07:49:11,833 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:49:11,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261470768] [2021-08-26 07:49:11,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261470768] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:49:11,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:49:11,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-08-26 07:49:11,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113766041] [2021-08-26 07:49:11,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-26 07:49:11,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:49:11,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-26 07:49:11,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-08-26 07:49:11,835 INFO L87 Difference]: Start difference. First operand 97 states and 122 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 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 07:49:12,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:49:12,157 INFO L93 Difference]: Finished difference Result 152 states and 192 transitions. [2021-08-26 07:49:12,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-26 07:49:12,158 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 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) Word has length 28 [2021-08-26 07:49:12,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:49:12,158 INFO L225 Difference]: With dead ends: 152 [2021-08-26 07:49:12,158 INFO L226 Difference]: Without dead ends: 84 [2021-08-26 07:49:12,159 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 304.0ms TimeCoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-08-26 07:49:12,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-08-26 07:49:12,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2021-08-26 07:49:12,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2) internal successors, (66), 55 states have internal predecessors, (66), 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 07:49:12,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2021-08-26 07:49:12,169 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 28 [2021-08-26 07:49:12,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:49:12,169 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2021-08-26 07:49:12,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 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 07:49:12,169 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2021-08-26 07:49:12,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-26 07:49:12,170 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:49:12,170 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:49:12,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-26 07:49:12,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-26 07:49:12,385 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:49:12,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:49:12,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1485315508, now seen corresponding path program 1 times [2021-08-26 07:49:12,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:49:12,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809745347] [2021-08-26 07:49:12,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:49:12,386 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:49:12,392 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:49:12,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1300364963] [2021-08-26 07:49:12,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:49:12,393 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:49:12,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:49:12,394 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:49:12,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-26 07:49:13,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:49:13,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-26 07:49:13,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:49:13,637 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:49:13,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:49:13,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809745347] [2021-08-26 07:49:13,638 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:49:13,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300364963] [2021-08-26 07:49:13,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300364963] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:49:13,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:49:13,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-08-26 07:49:13,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98987397] [2021-08-26 07:49:13,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-26 07:49:13,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:49:13,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-26 07:49:13,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-26 07:49:13,639 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 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 07:49:13,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:49:13,820 INFO L93 Difference]: Finished difference Result 109 states and 130 transitions. [2021-08-26 07:49:13,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-26 07:49:13,821 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 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 30 [2021-08-26 07:49:13,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:49:13,821 INFO L225 Difference]: With dead ends: 109 [2021-08-26 07:49:13,821 INFO L226 Difference]: Without dead ends: 42 [2021-08-26 07:49:13,821 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 122.4ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-08-26 07:49:13,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-08-26 07:49:13,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2021-08-26 07:49:13,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 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 07:49:13,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-08-26 07:49:13,827 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2021-08-26 07:49:13,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:49:13,827 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-08-26 07:49:13,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 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 07:49:13,828 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-08-26 07:49:13,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-26 07:49:13,828 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:49:13,828 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:49:13,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-08-26 07:49:14,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-26 07:49:14,033 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:49:14,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:49:14,033 INFO L82 PathProgramCache]: Analyzing trace with hash -550563327, now seen corresponding path program 1 times [2021-08-26 07:49:14,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:49:14,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093346700] [2021-08-26 07:49:14,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:49:14,034 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:49:14,040 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:49:14,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1162748959] [2021-08-26 07:49:14,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:49:14,041 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:49:14,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:49:14,042 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:49:14,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-26 07:49:14,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:49:14,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-26 07:49:14,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:49:15,593 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:49:15,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:49:15,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093346700] [2021-08-26 07:49:15,594 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:49:15,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162748959] [2021-08-26 07:49:15,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162748959] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:49:15,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:49:15,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-08-26 07:49:15,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519946200] [2021-08-26 07:49:15,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-26 07:49:15,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:49:15,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-26 07:49:15,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-08-26 07:49:15,596 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 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 07:49:16,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:49:16,213 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2021-08-26 07:49:16,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-26 07:49:16,213 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 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 31 [2021-08-26 07:49:16,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:49:16,214 INFO L225 Difference]: With dead ends: 66 [2021-08-26 07:49:16,214 INFO L226 Difference]: Without dead ends: 33 [2021-08-26 07:49:16,214 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 589.8ms TimeCoverageRelationStatistics Valid=176, Invalid=526, Unknown=0, NotChecked=0, Total=702 [2021-08-26 07:49:16,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-08-26 07:49:16,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-08-26 07:49:16,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 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 07:49:16,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2021-08-26 07:49:16,220 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2021-08-26 07:49:16,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:49:16,220 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2021-08-26 07:49:16,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 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 07:49:16,220 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2021-08-26 07:49:16,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-26 07:49:16,221 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:49:16,221 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:49:16,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-26 07:49:16,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-26 07:49:16,422 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:49:16,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:49:16,422 INFO L82 PathProgramCache]: Analyzing trace with hash -854633573, now seen corresponding path program 2 times [2021-08-26 07:49:16,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:49:16,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760365011] [2021-08-26 07:49:16,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:49:16,423 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:49:16,429 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:49:16,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [100278438] [2021-08-26 07:49:16,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 07:49:16,430 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:49:16,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:49:16,431 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:49:16,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-26 07:49:17,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-26 07:49:17,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 07:49:17,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-26 07:49:17,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:49:17,401 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-08-26 07:49:17,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:49:17,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760365011] [2021-08-26 07:49:17,402 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:49:17,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100278438] [2021-08-26 07:49:17,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100278438] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:49:17,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:49:17,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 07:49:17,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776924653] [2021-08-26 07:49:17,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 07:49:17,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:49:17,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 07:49:17,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 07:49:17,404 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 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 07:49:17,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:49:17,432 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2021-08-26 07:49:17,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 07:49:17,433 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 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 32 [2021-08-26 07:49:17,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:49:17,433 INFO L225 Difference]: With dead ends: 33 [2021-08-26 07:49:17,433 INFO L226 Difference]: Without dead ends: 0 [2021-08-26 07:49:17,434 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 07:49:17,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-26 07:49:17,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-26 07:49:17,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 07:49:17,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-26 07:49:17,435 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2021-08-26 07:49:17,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:49:17,435 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-26 07:49:17,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 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 07:49:17,436 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-26 07:49:17,436 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-26 07:49:17,438 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 07:49:17,439 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 07:49:17,439 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 07:49:17,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-26 07:49:17,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-26 07:49:17,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-26 07:49:17,658 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 07:49:18,026 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 07:49:18,027 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 07:49:18,028 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 07:49:18,577 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 07:50:06,866 WARN L207 SmtUtils]: Spent 48.23 s on a formula simplification. DAG size of input: 238 DAG size of output: 83 [2021-08-26 07:50:21,296 WARN L207 SmtUtils]: Spent 14.43 s on a formula simplification. DAG size of input: 248 DAG size of output: 74 [2021-08-26 07:50:21,809 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-08-26 07:50:21,810 INFO L857 garLoopResultBuilder]: For program point L44(lines 44 54) no Hoare annotation was computed. [2021-08-26 07:50:21,810 INFO L857 garLoopResultBuilder]: For program point L40(lines 40 54) no Hoare annotation was computed. [2021-08-26 07:50:21,810 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-26 07:50:21,810 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-26 07:50:21,810 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-26 07:50:21,810 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-08-26 07:50:21,810 INFO L857 garLoopResultBuilder]: For program point L12(lines 12 15) no Hoare annotation was computed. [2021-08-26 07:50:21,810 INFO L853 garLoopResultBuilder]: At program point L12-2(lines 37 38) the Hoare annotation is: (let ((.cse17 (* ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~y~0))) (let ((.cse12 (= ULTIMATE.start_main_~q~0 .cse17)) (.cse11 (= (mod (+ .cse17 (* ULTIMATE.start_main_~q~0 (- 1))) (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~b~0)) 0)) (.cse16 (not (= ULTIMATE.start_main_~a~0 0))) (.cse4 (+ ULTIMATE.start_main_~a~0 1))) (let ((.cse7 (not (= (mod .cse4 2) 0))) (.cse13 (<= ULTIMATE.start_main_~a~0 5)) (.cse9 (= .cse17 (+ ULTIMATE.start_main_~q~0 (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~p~0 ULTIMATE.start_main_~b~0)))) (.cse5 (<= 1 ULTIMATE.start_main_~y~0)) (.cse1 (<= ULTIMATE.start_main_~x~0 5)) (.cse2 (<= ULTIMATE.start_main_~y~0 5)) (.cse3 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse6 (or .cse12 (and .cse11 .cse16))) (.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse10 (+ ULTIMATE.start_main_~b~0 1)) (.cse8 (<= 0 ULTIMATE.start_main_~a~0)) (.cse14 (<= 0 ULTIMATE.start_main_~x~0))) (or (and .cse0 .cse1 .cse2 .cse3 (= (div ULTIMATE.start_main_~x~0 2) .cse4) (<= (mod ULTIMATE.start_main_~x~0 2) 0) .cse5 .cse6 .cse7 .cse8) (and .cse0 .cse1 .cse9 .cse2 .cse3 .cse5 (<= 0 .cse10) .cse7 (not (= (mod .cse10 2) 0)) (or .cse11 .cse12) .cse13 .cse8 .cse14) (and .cse0 .cse9 (= ULTIMATE.start_main_~p~0 1) .cse2 .cse3 (<= 1 ULTIMATE.start_main_~b~0) (= ULTIMATE.start_main_~q~0 0) .cse13 .cse14 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0)) (and (= (mod ULTIMATE.start_main_~p~0 4) 0) (<= 0 ULTIMATE.start_main_~b~0) (<= (* 2 ULTIMATE.start_main_~a~0) 5) .cse9 .cse5 (or (and .cse0 .cse1 .cse2 .cse3 .cse6 (not (= ULTIMATE.start_main_~b~0 0)) .cse8) (and .cse0 (<= ULTIMATE.start_main_~x~0 .cse4) (exists ((ULTIMATE.start_main_~p~0 Int)) (and (let ((.cse15 (= (* ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~y~0) (+ ULTIMATE.start_main_~q~0 (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~p~0 ULTIMATE.start_main_~b~0))))) (or (and (= 0 ULTIMATE.start___VERIFIER_assert_~cond) (not .cse15)) (and .cse15 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)))) (<= 1 ULTIMATE.start_main_~p~0))) (<= ULTIMATE.start_main_~y~0 .cse10) (<= 1 ULTIMATE.start_main_~p~0) .cse12 .cse8)) .cse16 .cse14))))) [2021-08-26 07:50:21,810 INFO L857 garLoopResultBuilder]: For program point L12-3(lines 12 15) no Hoare annotation was computed. [2021-08-26 07:50:21,810 INFO L857 garLoopResultBuilder]: For program point L8(lines 8 10) no Hoare annotation was computed. [2021-08-26 07:50:21,810 INFO L857 garLoopResultBuilder]: For program point L8-1(lines 8 10) no Hoare annotation was computed. [2021-08-26 07:50:21,811 INFO L853 garLoopResultBuilder]: At program point L12-5(lines 11 17) the Hoare annotation is: (let ((.cse11 (* ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~y~0))) (let ((.cse6 (= ULTIMATE.start_main_~a~0 0)) (.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse1 (<= ULTIMATE.start_main_~x~0 5)) (.cse2 (= ULTIMATE.start_main_~b~0 0)) (.cse3 (= .cse11 (+ ULTIMATE.start_main_~q~0 (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~p~0 ULTIMATE.start_main_~b~0)))) (.cse4 (<= ULTIMATE.start_main_~y~0 5)) (.cse10 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse5 (<= 1 ULTIMATE.start_main_~y~0)) (.cse7 (<= 0 ULTIMATE.start_main_~a~0)) (.cse8 (<= 0 ULTIMATE.start_main_~x~0))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 (not .cse6) .cse7 .cse8) (let ((.cse9 (div ULTIMATE.start_main_~x~0 2))) (and .cse0 .cse1 (not (= (mod .cse9 2) 0)) .cse4 .cse10 (= .cse9 (+ ULTIMATE.start_main_~a~0 1)) (<= (mod ULTIMATE.start_main_~x~0 2) 0) .cse5 (= ULTIMATE.start_main_~q~0 .cse11) .cse8)) (and .cse6 .cse0 .cse1 .cse4 .cse5 (<= 1 ULTIMATE.start_main_~b~0) .cse8) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse10 .cse5 .cse7 .cse8)))) [2021-08-26 07:50:21,811 INFO L857 garLoopResultBuilder]: For program point L8-2(lines 8 10) no Hoare annotation was computed. [2021-08-26 07:50:21,811 INFO L857 garLoopResultBuilder]: For program point L12-6(lines 12 15) no Hoare annotation was computed. [2021-08-26 07:50:21,811 INFO L860 garLoopResultBuilder]: At program point L12-8(lines 11 17) the Hoare annotation is: true [2021-08-26 07:50:21,811 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-26 07:50:21,811 INFO L857 garLoopResultBuilder]: For program point L13(lines 13 14) no Hoare annotation was computed. [2021-08-26 07:50:21,811 INFO L857 garLoopResultBuilder]: For program point L13-1(lines 13 14) no Hoare annotation was computed. [2021-08-26 07:50:21,811 INFO L857 garLoopResultBuilder]: For program point L13-2(lines 13 14) no Hoare annotation was computed. [2021-08-26 07:50:21,811 INFO L857 garLoopResultBuilder]: For program point L9(line 9) no Hoare annotation was computed. [2021-08-26 07:50:21,811 INFO L857 garLoopResultBuilder]: For program point L9-2(line 9) no Hoare annotation was computed. [2021-08-26 07:50:21,811 INFO L857 garLoopResultBuilder]: For program point L9-4(line 9) no Hoare annotation was computed. [2021-08-26 07:50:21,811 INFO L857 garLoopResultBuilder]: For program point L34-2(lines 34 55) no Hoare annotation was computed. [2021-08-26 07:50:21,811 INFO L860 garLoopResultBuilder]: At program point L59(lines 19 60) the Hoare annotation is: true [2021-08-26 07:50:21,811 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-08-26 07:50:21,811 INFO L857 garLoopResultBuilder]: For program point L47(lines 47 54) no Hoare annotation was computed. [2021-08-26 07:50:21,812 INFO L853 garLoopResultBuilder]: At program point L47-2(lines 34 55) the Hoare annotation is: (let ((.cse14 (+ ULTIMATE.start_main_~a~0 1))) (let ((.cse13 (mod .cse14 2))) (let ((.cse4 (<= ULTIMATE.start_main_~a~0 5)) (.cse7 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse8 (<= 1 ULTIMATE.start_main_~y~0)) (.cse10 (not (= .cse13 0))) (.cse11 (<= 0 ULTIMATE.start_main_~a~0)) (.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse6 (<= ULTIMATE.start_main_~x~0 5)) (.cse1 (= (* ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~y~0) (+ ULTIMATE.start_main_~q~0 (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~p~0 ULTIMATE.start_main_~b~0)))) (.cse2 (<= ULTIMATE.start_main_~y~0 5)) (.cse12 (= (div ULTIMATE.start_main_~x~0 2) .cse14)) (.cse3 (<= 1 ULTIMATE.start_main_~b~0)) (.cse5 (<= 0 ULTIMATE.start_main_~x~0))) (or (and .cse0 .cse1 (= ULTIMATE.start_main_~p~0 1) .cse2 .cse3 (= ULTIMATE.start_main_~q~0 0) .cse4 .cse5 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0)) (let ((.cse9 (+ ULTIMATE.start_main_~b~0 1))) (and .cse0 .cse6 .cse1 .cse2 .cse7 .cse8 (<= 0 .cse9) .cse10 (not (= (mod .cse9 2) 0)) .cse4 .cse11 .cse5)) (and (= (mod ULTIMATE.start_main_~p~0 4) 0) .cse0 .cse6 (<= 0 ULTIMATE.start_main_~b~0) (<= (* 2 ULTIMATE.start_main_~a~0) 5) .cse1 .cse2 .cse7 .cse8 (not (= ULTIMATE.start_main_~b~0 0)) (not (= ULTIMATE.start_main_~a~0 0)) .cse11 .cse5) (and .cse0 .cse6 .cse1 .cse2 .cse7 .cse12 (<= (mod ULTIMATE.start_main_~x~0 2) 0) .cse8 .cse10 .cse11) (and .cse0 .cse6 (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse1 (= (mod (* ULTIMATE.start_main_~p~0 3) (- 4)) 0) .cse2 .cse12 (= ULTIMATE.start_main_~q~0 (* ULTIMATE.start_main_~p~0 ULTIMATE.start_main_~b~0)) (= ULTIMATE.start_main_~b~0 (div ULTIMATE.start_main_~y~0 2)) .cse3 .cse5 (<= 1 .cse13)))))) [2021-08-26 07:50:21,814 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 07:50:21,821 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~p~0,QUANTIFIED] [2021-08-26 07:50:21,828 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~p~0,QUANTIFIED] [2021-08-26 07:50:21,828 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~p~0,QUANTIFIED] [2021-08-26 07:50:21,842 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~p~0,QUANTIFIED] [2021-08-26 07:50:21,848 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~p~0,QUANTIFIED] [2021-08-26 07:50:21,849 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~p~0,QUANTIFIED] [2021-08-26 07:50:21,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 07:50:21 BoogieIcfgContainer [2021-08-26 07:50:21,855 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 07:50:21,855 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 07:50:21,855 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 07:50:21,856 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 07:50:21,856 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 07:46:30" (3/4) ... [2021-08-26 07:50:21,859 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-26 07:50:21,867 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-08-26 07:50:21,867 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-26 07:50:21,868 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 07:50:21,868 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 07:50:21,887 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((((((((cond == 1 && x <= 5) && y <= 5) && 1 == cond) && x / 2 == a + 1) && x % 2 <= 0) && 1 <= y) && (q == x * y || ((x * y + q * -1) % (a * b) == 0 && !(a == 0)))) && !((a + 1) % 2 == 0)) && 0 <= a) || ((((((((((((cond == 1 && x <= 5) && x * y == q + a * p * b) && y <= 5) && 1 == cond) && 1 <= y) && 0 <= b + 1) && !((a + 1) % 2 == 0)) && !((b + 1) % 2 == 0)) && ((x * y + q * -1) % (a * b) == 0 || q == x * y)) && a <= 5) && 0 <= a) && 0 <= x)) || (((((((((cond == 1 && x * y == q + a * p * b) && p == 1) && y <= 5) && 1 == cond) && 1 <= b) && q == 0) && a <= 5) && 0 <= x) && b == y)) || (((((((p % 4 == 0 && 0 <= b) && 2 * a <= 5) && x * y == q + a * p * b) && 1 <= y) && (((((((cond == 1 && x <= 5) && y <= 5) && 1 == cond) && (q == x * y || ((x * y + q * -1) % (a * b) == 0 && !(a == 0)))) && !(b == 0)) && 0 <= a) || ((((((cond == 1 && x <= a + 1) && (\exists ULTIMATE.start_main_~p~0 : int :: ((0 == cond && !(x * y == q + a * ULTIMATE.start_main_~p~0 * b)) || (x * y == q + a * ULTIMATE.start_main_~p~0 * b && 1 == cond)) && 1 <= ULTIMATE.start_main_~p~0)) && y <= b + 1) && 1 <= p) && q == x * y) && 0 <= a))) && !(a == 0)) && 0 <= x) [2021-08-26 07:50:21,897 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 07:50:21,897 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 07:50:21,898 INFO L168 Benchmark]: Toolchain (without parser) took 231697.68 ms. Allocated memory was 58.7 MB in the beginning and 497.0 MB in the end (delta: 438.3 MB). Free memory was 37.0 MB in the beginning and 276.9 MB in the end (delta: -239.9 MB). Peak memory consumption was 196.8 MB. Max. memory is 16.1 GB. [2021-08-26 07:50:21,898 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 58.7 MB. Free memory is still 40.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 07:50:21,898 INFO L168 Benchmark]: CACSL2BoogieTranslator took 231.48 ms. Allocated memory is still 58.7 MB. Free memory was 36.9 MB in the beginning and 41.1 MB in the end (delta: -4.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-26 07:50:21,899 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.87 ms. Allocated memory is still 58.7 MB. Free memory was 41.1 MB in the beginning and 39.4 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 07:50:21,899 INFO L168 Benchmark]: Boogie Preprocessor took 44.51 ms. Allocated memory is still 58.7 MB. Free memory was 39.4 MB in the beginning and 38.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 07:50:21,899 INFO L168 Benchmark]: RCFGBuilder took 386.57 ms. Allocated memory was 58.7 MB in the beginning and 73.4 MB in the end (delta: 14.7 MB). Free memory was 38.2 MB in the beginning and 52.5 MB in the end (delta: -14.3 MB). Peak memory consumption was 16.2 MB. Max. memory is 16.1 GB. [2021-08-26 07:50:21,900 INFO L168 Benchmark]: TraceAbstraction took 230950.71 ms. Allocated memory was 73.4 MB in the beginning and 497.0 MB in the end (delta: 423.6 MB). Free memory was 52.2 MB in the beginning and 281.1 MB in the end (delta: -228.9 MB). Peak memory consumption was 404.6 MB. Max. memory is 16.1 GB. [2021-08-26 07:50:21,900 INFO L168 Benchmark]: Witness Printer took 41.86 ms. Allocated memory is still 497.0 MB. Free memory was 280.1 MB in the beginning and 276.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 07:50:21,901 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 58.7 MB. Free memory is still 40.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 231.48 ms. Allocated memory is still 58.7 MB. Free memory was 36.9 MB in the beginning and 41.1 MB in the end (delta: -4.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.87 ms. Allocated memory is still 58.7 MB. Free memory was 41.1 MB in the beginning and 39.4 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 44.51 ms. Allocated memory is still 58.7 MB. Free memory was 39.4 MB in the beginning and 38.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 386.57 ms. Allocated memory was 58.7 MB in the beginning and 73.4 MB in the end (delta: 14.7 MB). Free memory was 38.2 MB in the beginning and 52.5 MB in the end (delta: -14.3 MB). Peak memory consumption was 16.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 230950.71 ms. Allocated memory was 73.4 MB in the beginning and 497.0 MB in the end (delta: 423.6 MB). Free memory was 52.2 MB in the beginning and 281.1 MB in the end (delta: -228.9 MB). Peak memory consumption was 404.6 MB. Max. memory is 16.1 GB. * Witness Printer took 41.86 ms. Allocated memory is still 497.0 MB. Free memory was 280.1 MB in the beginning and 276.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~p~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~p~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~p~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~p~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~p~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~p~0,QUANTIFIED] * 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 - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 28 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 230851.5ms, OverallIterations: 29, TraceHistogramMax: 4, EmptinessCheckTime: 24.2ms, AutomataDifference: 117642.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 64156.1ms, InitialAbstractionConstructionTime: 7.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 456 SDtfs, 2013 SDslu, 1327 SDs, 0 SdLazy, 3468 SolverSat, 624 SolverUnsat, 13 SolverUnknown, 0 SolverNotchecked, 42693.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 737 GetRequests, 354 SyntacticMatches, 2 SemanticMatches, 381 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 82522.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=101occurred in iteration=24, InterpolantAutomatonStates: 305, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 231.5ms AutomataMinimizationTime, 29 MinimizatonAttempts, 346 StatesRemovedByMinimization, 26 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 54 NumberOfFragments, 710 HoareAnnotationTreeSize, 5 FomulaSimplifications, 193505563 FormulaSimplificationTreeSizeReduction, 981.7ms HoareSimplificationTime, 5 FomulaSimplificationsInter, 70662 FormulaSimplificationTreeSizeReductionInter, 63165.8ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 158.5ms SsaConstructionTime, 654.5ms SatisfiabilityAnalysisTime, 30342.7ms InterpolantComputationTime, 605 NumberOfCodeBlocks, 573 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 576 ConstructedInterpolants, 7 QuantifiedInterpolants, 7524 SizeOfPredicates, 270 NumberOfNonLiveVariables, 2709 ConjunctsInSsa, 737 ConjunctsInUnsatCore, 29 InterpolantComputations, 10 PerfectInterpolantSequences, 114/225 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 - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - InvariantResult [Line: 37]: Loop Invariant [2021-08-26 07:50:21,907 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~p~0,QUANTIFIED] [2021-08-26 07:50:21,907 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~p~0,QUANTIFIED] [2021-08-26 07:50:21,908 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~p~0,QUANTIFIED] [2021-08-26 07:50:21,909 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~p~0,QUANTIFIED] [2021-08-26 07:50:21,909 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~p~0,QUANTIFIED] [2021-08-26 07:50:21,909 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~p~0,QUANTIFIED] Derived loop invariant: (((((((((((cond == 1 && x <= 5) && y <= 5) && 1 == cond) && x / 2 == a + 1) && x % 2 <= 0) && 1 <= y) && (q == x * y || ((x * y + q * -1) % (a * b) == 0 && !(a == 0)))) && !((a + 1) % 2 == 0)) && 0 <= a) || ((((((((((((cond == 1 && x <= 5) && x * y == q + a * p * b) && y <= 5) && 1 == cond) && 1 <= y) && 0 <= b + 1) && !((a + 1) % 2 == 0)) && !((b + 1) % 2 == 0)) && ((x * y + q * -1) % (a * b) == 0 || q == x * y)) && a <= 5) && 0 <= a) && 0 <= x)) || (((((((((cond == 1 && x * y == q + a * p * b) && p == 1) && y <= 5) && 1 == cond) && 1 <= b) && q == 0) && a <= 5) && 0 <= x) && b == y)) || (((((((p % 4 == 0 && 0 <= b) && 2 * a <= 5) && x * y == q + a * p * b) && 1 <= y) && (((((((cond == 1 && x <= 5) && y <= 5) && 1 == cond) && (q == x * y || ((x * y + q * -1) % (a * b) == 0 && !(a == 0)))) && !(b == 0)) && 0 <= a) || ((((((cond == 1 && x <= a + 1) && (\exists ULTIMATE.start_main_~p~0 : int :: ((0 == cond && !(x * y == q + a * ULTIMATE.start_main_~p~0 * b)) || (x * y == q + a * ULTIMATE.start_main_~p~0 * b && 1 == cond)) && 1 <= ULTIMATE.start_main_~p~0)) && y <= b + 1) && 1 <= p) && q == x * y) && 0 <= a))) && !(a == 0)) && 0 <= x) - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (((((((((((cond == 1 && x * y == q + a * p * b) && p == 1) && y <= 5) && 1 <= b) && q == 0) && a <= 5) && 0 <= x) && b == y) || (((((((((((cond == 1 && x <= 5) && x * y == q + a * p * b) && y <= 5) && 1 == cond) && 1 <= y) && 0 <= b + 1) && !((a + 1) % 2 == 0)) && !((b + 1) % 2 == 0)) && a <= 5) && 0 <= a) && 0 <= x)) || ((((((((((((p % 4 == 0 && cond == 1) && x <= 5) && 0 <= b) && 2 * a <= 5) && x * y == q + a * p * b) && y <= 5) && 1 == cond) && 1 <= y) && !(b == 0)) && !(a == 0)) && 0 <= a) && 0 <= x)) || (((((((((cond == 1 && x <= 5) && x * y == q + a * p * b) && y <= 5) && 1 == cond) && x / 2 == a + 1) && x % 2 <= 0) && 1 <= y) && !((a + 1) % 2 == 0)) && 0 <= a)) || (((((((((((cond == 1 && x <= 5) && 1 <= cond) && x * y == q + a * p * b) && p * 3 % -4 == 0) && y <= 5) && x / 2 == a + 1) && q == p * b) && b == y / 2) && 1 <= b) && 0 <= x) && 1 <= (a + 1) % 2) - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: ((((((((((cond == 1 && x <= 5) && b == 0) && x * y == q + a * p * b) && y <= 5) && 1 <= y) && !(a == 0)) && 0 <= a) && 0 <= x) || (((((((((cond == 1 && x <= 5) && !(x / 2 % 2 == 0)) && y <= 5) && 1 == cond) && x / 2 == a + 1) && x % 2 <= 0) && 1 <= y) && q == x * y) && 0 <= x)) || ((((((a == 0 && cond == 1) && x <= 5) && y <= 5) && 1 <= y) && 1 <= b) && 0 <= x)) || ((((((((cond == 1 && x <= 5) && b == 0) && x * y == q + a * p * b) && y <= 5) && 1 == cond) && 1 <= y) && 0 <= a) && 0 <= x) RESULT: Ultimate proved your program to be correct! [2021-08-26 07:50:21,972 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...