./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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_unwindbound100.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 4d17ed8dd7de3007f02b2c3df3a75e1fbb5469b0133c538c149df8a118a565d0 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 00:29:46,241 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 00:29:46,244 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 00:29:46,276 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 00:29:46,277 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 00:29:46,278 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 00:29:46,279 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 00:29:46,280 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 00:29:46,282 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 00:29:46,283 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 00:29:46,284 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 00:29:46,285 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 00:29:46,285 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 00:29:46,286 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 00:29:46,287 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 00:29:46,288 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 00:29:46,288 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 00:29:46,289 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 00:29:46,290 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 00:29:46,292 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 00:29:46,293 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 00:29:46,294 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 00:29:46,295 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 00:29:46,296 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 00:29:46,298 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 00:29:46,298 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 00:29:46,299 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 00:29:46,300 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 00:29:46,300 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 00:29:46,301 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 00:29:46,301 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 00:29:46,302 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 00:29:46,303 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 00:29:46,304 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 00:29:46,305 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 00:29:46,305 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 00:29:46,306 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 00:29:46,306 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 00:29:46,306 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 00:29:46,307 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 00:29:46,307 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 00:29:46,308 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 00:29:46,328 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 00:29:46,328 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 00:29:46,328 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 00:29:46,328 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 00:29:46,329 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 00:29:46,329 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 00:29:46,330 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 00:29:46,330 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 00:29:46,330 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 00:29:46,331 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 00:29:46,331 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 00:29:46,331 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 00:29:46,331 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 00:29:46,331 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 00:29:46,332 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 00:29:46,332 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 00:29:46,332 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 00:29:46,332 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 00:29:46,332 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 00:29:46,333 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 00:29:46,333 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 00:29:46,333 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 00:29:46,333 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 00:29:46,333 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 00:29:46,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 00:29:46,334 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 00:29:46,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 00:29:46,334 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 00:29:46,334 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 00:29:46,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 00:29:46,335 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 00:29:46,335 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 00:29:46,335 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 00:29:46,336 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d17ed8dd7de3007f02b2c3df3a75e1fbb5469b0133c538c149df8a118a565d0 [2021-12-28 00:29:46,639 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 00:29:46,669 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 00:29:46,671 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 00:29:46,672 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 00:29:46,674 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 00:29:46,676 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound100.c [2021-12-28 00:29:46,746 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea5e82ede/4de670fe7dce4df8a943da9c2cc260f9/FLAG55967a5d2 [2021-12-28 00:29:47,116 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 00:29:47,117 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound100.c [2021-12-28 00:29:47,128 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea5e82ede/4de670fe7dce4df8a943da9c2cc260f9/FLAG55967a5d2 [2021-12-28 00:29:47,536 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea5e82ede/4de670fe7dce4df8a943da9c2cc260f9 [2021-12-28 00:29:47,539 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 00:29:47,540 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 00:29:47,541 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 00:29:47,541 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 00:29:47,544 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 00:29:47,545 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 12:29:47" (1/1) ... [2021-12-28 00:29:47,546 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50368f3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:29:47, skipping insertion in model container [2021-12-28 00:29:47,546 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 12:29:47" (1/1) ... [2021-12-28 00:29:47,552 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 00:29:47,563 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 00:29:47,672 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound100.c[524,537] [2021-12-28 00:29:47,687 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 00:29:47,693 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 00:29:47,732 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound100.c[524,537] [2021-12-28 00:29:47,752 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 00:29:47,762 INFO L208 MainTranslator]: Completed translation [2021-12-28 00:29:47,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:29:47 WrapperNode [2021-12-28 00:29:47,763 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 00:29:47,764 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 00:29:47,764 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 00:29:47,764 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 00:29:47,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:29:47" (1/1) ... [2021-12-28 00:29:47,775 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:29:47" (1/1) ... [2021-12-28 00:29:47,791 INFO L137 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2021-12-28 00:29:47,792 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 00:29:47,792 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 00:29:47,792 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 00:29:47,793 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 00:29:47,799 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:29:47" (1/1) ... [2021-12-28 00:29:47,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:29:47" (1/1) ... [2021-12-28 00:29:47,801 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:29:47" (1/1) ... [2021-12-28 00:29:47,801 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:29:47" (1/1) ... [2021-12-28 00:29:47,804 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:29:47" (1/1) ... [2021-12-28 00:29:47,807 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:29:47" (1/1) ... [2021-12-28 00:29:47,808 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:29:47" (1/1) ... [2021-12-28 00:29:47,810 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 00:29:47,810 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 00:29:47,811 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 00:29:47,811 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 00:29:47,811 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:29:47" (1/1) ... [2021-12-28 00:29:47,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 00:29:47,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:29:47,844 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-28 00:29:47,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-28 00:29:47,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 00:29:47,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 00:29:47,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 00:29:47,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 00:29:47,894 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-28 00:29:47,894 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-28 00:29:47,957 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 00:29:47,958 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 00:29:48,065 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 00:29:48,070 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 00:29:48,071 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-28 00:29:48,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 12:29:48 BoogieIcfgContainer [2021-12-28 00:29:48,072 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 00:29:48,085 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 00:29:48,085 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 00:29:48,087 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 00:29:48,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 12:29:47" (1/3) ... [2021-12-28 00:29:48,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@540c65c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 12:29:48, skipping insertion in model container [2021-12-28 00:29:48,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:29:47" (2/3) ... [2021-12-28 00:29:48,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@540c65c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 12:29:48, skipping insertion in model container [2021-12-28 00:29:48,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 12:29:48" (3/3) ... [2021-12-28 00:29:48,090 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound100.c [2021-12-28 00:29:48,094 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 00:29:48,094 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 00:29:48,128 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 00:29:48,134 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-28 00:29:48,135 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 00:29:48,148 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 00:29:48,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-28 00:29:48,151 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:29:48,152 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:29:48,152 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:29:48,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:29:48,156 INFO L85 PathProgramCache]: Analyzing trace with hash -563977895, now seen corresponding path program 1 times [2021-12-28 00:29:48,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:29:48,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030118990] [2021-12-28 00:29:48,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:29:48,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:29:48,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:29:48,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 00:29:48,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:29:48,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030118990] [2021-12-28 00:29:48,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030118990] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:29:48,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 00:29:48,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 00:29:48,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210467362] [2021-12-28 00:29:48,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:29:48,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-28 00:29:48,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:29:48,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-28 00:29:48,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-28 00:29:48,307 INFO L87 Difference]: Start difference. First operand has 23 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 00:29:48,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:29:48,327 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2021-12-28 00:29:48,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-28 00:29:48,330 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-28 00:29:48,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:29:48,338 INFO L225 Difference]: With dead ends: 43 [2021-12-28 00:29:48,339 INFO L226 Difference]: Without dead ends: 19 [2021-12-28 00:29:48,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-28 00:29:48,350 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 00:29:48,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 00:29:48,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-12-28 00:29:48,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-12-28 00:29:48,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 00:29:48,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2021-12-28 00:29:48,399 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 9 [2021-12-28 00:29:48,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:29:48,400 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2021-12-28 00:29:48,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 00:29:48,401 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2021-12-28 00:29:48,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-28 00:29:48,402 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:29:48,402 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:29:48,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 00:29:48,403 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:29:48,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:29:48,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1986058659, now seen corresponding path program 1 times [2021-12-28 00:29:48,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:29:48,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635097608] [2021-12-28 00:29:48,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:29:48,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:29:48,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:29:48,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 00:29:48,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:29:48,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635097608] [2021-12-28 00:29:48,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635097608] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:29:48,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 00:29:48,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 00:29:48,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906561114] [2021-12-28 00:29:48,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:29:48,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 00:29:48,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:29:48,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 00:29:48,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 00:29:48,521 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 00:29:48,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:29:48,545 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2021-12-28 00:29:48,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 00:29:48,545 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-28 00:29:48,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:29:48,546 INFO L225 Difference]: With dead ends: 29 [2021-12-28 00:29:48,546 INFO L226 Difference]: Without dead ends: 21 [2021-12-28 00:29:48,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 00:29:48,548 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 00:29:48,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 63 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 00:29:48,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-12-28 00:29:48,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-12-28 00:29:48,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 00:29:48,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2021-12-28 00:29:48,563 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 10 [2021-12-28 00:29:48,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:29:48,563 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2021-12-28 00:29:48,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 00:29:48,564 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2021-12-28 00:29:48,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-28 00:29:48,564 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:29:48,564 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:29:48,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 00:29:48,565 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:29:48,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:29:48,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1984271199, now seen corresponding path program 1 times [2021-12-28 00:29:48,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:29:48,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228686135] [2021-12-28 00:29:48,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:29:48,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:29:48,590 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:29:48,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [334189784] [2021-12-28 00:29:48,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:29:48,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:29:48,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:29:48,618 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 00:29:48,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 00:29:48,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:29:48,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-28 00:29:48,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:29:48,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 00:29:48,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 00:29:48,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:29:48,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228686135] [2021-12-28 00:29:48,870 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:29:48,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334189784] [2021-12-28 00:29:48,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334189784] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:29:48,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 00:29:48,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 00:29:48,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199654573] [2021-12-28 00:29:48,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:29:48,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 00:29:48,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:29:48,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 00:29:48,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 00:29:48,873 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 00:29:48,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:29:48,960 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2021-12-28 00:29:48,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 00:29:48,961 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-28 00:29:48,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:29:48,965 INFO L225 Difference]: With dead ends: 34 [2021-12-28 00:29:48,965 INFO L226 Difference]: Without dead ends: 32 [2021-12-28 00:29:48,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 00:29:48,968 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 9 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 00:29:48,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 58 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 00:29:48,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-28 00:29:48,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2021-12-28 00:29:48,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 21 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 00:29:48,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-12-28 00:29:48,986 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 10 [2021-12-28 00:29:48,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:29:48,987 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-12-28 00:29:48,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 00:29:48,987 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-12-28 00:29:48,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-28 00:29:48,988 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:29:48,989 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:29:49,016 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-28 00:29:49,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:29:49,213 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:29:49,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:29:49,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1194524114, now seen corresponding path program 1 times [2021-12-28 00:29:49,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:29:49,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793243473] [2021-12-28 00:29:49,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:29:49,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:29:49,233 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:29:49,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [610599139] [2021-12-28 00:29:49,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:29:49,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:29:49,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:29:49,235 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 00:29:49,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 00:29:49,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:29:49,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-28 00:29:49,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:29:49,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 00:29:49,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:29:49,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 00:29:49,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:29:49,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793243473] [2021-12-28 00:29:49,791 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:29:49,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610599139] [2021-12-28 00:29:49,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610599139] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 00:29:49,791 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 00:29:49,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2021-12-28 00:29:49,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165366328] [2021-12-28 00:29:49,792 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 00:29:49,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-28 00:29:49,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:29:49,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-28 00:29:49,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-12-28 00:29:49,794 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 00:29:50,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:29:50,232 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2021-12-28 00:29:50,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-28 00:29:50,233 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2021-12-28 00:29:50,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:29:50,237 INFO L225 Difference]: With dead ends: 47 [2021-12-28 00:29:50,237 INFO L226 Difference]: Without dead ends: 45 [2021-12-28 00:29:50,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-12-28 00:29:50,241 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 61 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 00:29:50,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 101 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 00:29:50,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-28 00:29:50,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2021-12-28 00:29:50,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 25 states have internal predecessors, (28), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-28 00:29:50,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2021-12-28 00:29:50,248 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 16 [2021-12-28 00:29:50,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:29:50,248 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2021-12-28 00:29:50,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 00:29:50,249 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2021-12-28 00:29:50,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-28 00:29:50,249 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:29:50,249 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:29:50,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-28 00:29:50,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-28 00:29:50,464 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:29:50,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:29:50,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1756733383, now seen corresponding path program 1 times [2021-12-28 00:29:50,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:29:50,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786724986] [2021-12-28 00:29:50,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:29:50,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:29:50,475 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:29:50,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1118150071] [2021-12-28 00:29:50,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:29:50,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:29:50,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:29:50,477 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 00:29:50,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 00:29:50,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:29:50,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-28 00:29:50,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:29:50,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 00:29:50,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:29:50,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 00:29:50,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:29:50,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786724986] [2021-12-28 00:29:50,670 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:29:50,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118150071] [2021-12-28 00:29:50,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118150071] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 00:29:50,670 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 00:29:50,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-12-28 00:29:50,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443299026] [2021-12-28 00:29:50,671 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 00:29:50,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 00:29:50,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:29:50,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 00:29:50,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-28 00:29:50,672 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 00:29:50,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:29:50,747 INFO L93 Difference]: Finished difference Result 95 states and 115 transitions. [2021-12-28 00:29:50,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 00:29:50,747 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2021-12-28 00:29:50,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:29:50,748 INFO L225 Difference]: With dead ends: 95 [2021-12-28 00:29:50,749 INFO L226 Difference]: Without dead ends: 85 [2021-12-28 00:29:50,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-28 00:29:50,750 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 52 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 00:29:50,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 124 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 00:29:50,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-28 00:29:50,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2021-12-28 00:29:50,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 61 states have internal predecessors, (77), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-28 00:29:50,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 99 transitions. [2021-12-28 00:29:50,777 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 99 transitions. Word has length 19 [2021-12-28 00:29:50,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:29:50,777 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 99 transitions. [2021-12-28 00:29:50,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 00:29:50,778 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 99 transitions. [2021-12-28 00:29:50,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-28 00:29:50,778 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:29:50,779 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:29:50,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 00:29:51,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:29:51,005 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:29:51,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:29:51,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1754945923, now seen corresponding path program 1 times [2021-12-28 00:29:51,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:29:51,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013305456] [2021-12-28 00:29:51,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:29:51,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:29:51,014 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:29:51,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1070095436] [2021-12-28 00:29:51,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:29:51,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:29:51,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:29:51,016 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 00:29:51,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-28 00:29:51,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:29:51,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-28 00:29:51,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:29:53,189 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 00:29:53,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:29:53,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 00:29:53,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:29:53,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013305456] [2021-12-28 00:29:53,895 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:29:53,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070095436] [2021-12-28 00:29:53,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070095436] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 00:29:53,895 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 00:29:53,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-12-28 00:29:53,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709389301] [2021-12-28 00:29:53,895 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 00:29:53,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-28 00:29:53,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:29:53,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-28 00:29:53,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-12-28 00:29:53,897 INFO L87 Difference]: Start difference. First operand 79 states and 99 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 00:29:55,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:29:55,299 INFO L93 Difference]: Finished difference Result 120 states and 157 transitions. [2021-12-28 00:29:55,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 00:29:55,300 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2021-12-28 00:29:55,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:29:55,301 INFO L225 Difference]: With dead ends: 120 [2021-12-28 00:29:55,301 INFO L226 Difference]: Without dead ends: 114 [2021-12-28 00:29:55,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-12-28 00:29:55,303 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 104 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-28 00:29:55,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 116 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-28 00:29:55,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-28 00:29:55,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 71. [2021-12-28 00:29:55,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 54 states have (on average 1.3333333333333333) internal successors, (72), 56 states have internal predecessors, (72), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-28 00:29:55,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2021-12-28 00:29:55,319 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 19 [2021-12-28 00:29:55,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:29:55,319 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2021-12-28 00:29:55,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 00:29:55,320 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2021-12-28 00:29:55,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-28 00:29:55,321 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:29:55,321 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:29:55,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-28 00:29:55,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:29:55,543 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:29:55,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:29:55,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1942139802, now seen corresponding path program 1 times [2021-12-28 00:29:55,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:29:55,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082586490] [2021-12-28 00:29:55,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:29:55,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:29:55,551 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:29:55,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [840563857] [2021-12-28 00:29:55,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:29:55,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:29:55,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:29:55,557 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 00:29:55,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-28 00:29:55,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:29:55,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-28 00:29:55,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:29:55,669 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 00:29:55,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 00:29:55,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:29:55,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082586490] [2021-12-28 00:29:55,670 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:29:55,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840563857] [2021-12-28 00:29:55,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840563857] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:29:55,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 00:29:55,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 00:29:55,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237204773] [2021-12-28 00:29:55,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:29:55,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 00:29:55,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:29:55,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 00:29:55,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-28 00:29:55,672 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 00:29:55,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:29:55,804 INFO L93 Difference]: Finished difference Result 108 states and 143 transitions. [2021-12-28 00:29:55,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 00:29:55,804 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2021-12-28 00:29:55,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:29:55,805 INFO L225 Difference]: With dead ends: 108 [2021-12-28 00:29:55,805 INFO L226 Difference]: Without dead ends: 96 [2021-12-28 00:29:55,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-12-28 00:29:55,807 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 52 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 00:29:55,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 98 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 00:29:55,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-28 00:29:55,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2021-12-28 00:29:55,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 71 states have (on average 1.3380281690140845) internal successors, (95), 73 states have internal predecessors, (95), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-28 00:29:55,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 117 transitions. [2021-12-28 00:29:55,823 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 117 transitions. Word has length 21 [2021-12-28 00:29:55,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:29:55,824 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 117 transitions. [2021-12-28 00:29:55,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 00:29:55,824 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 117 transitions. [2021-12-28 00:29:55,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-28 00:29:55,825 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:29:55,825 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:29:55,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-28 00:29:56,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:29:56,051 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:29:56,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:29:56,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1954557947, now seen corresponding path program 1 times [2021-12-28 00:29:56,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:29:56,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404772585] [2021-12-28 00:29:56,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:29:56,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:29:56,059 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:29:56,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [703097063] [2021-12-28 00:29:56,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:29:56,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:29:56,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:29:56,061 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 00:29:56,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-28 00:29:56,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:29:56,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-28 00:29:56,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:29:56,173 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-28 00:29:56,174 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 00:29:56,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:29:56,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404772585] [2021-12-28 00:29:56,174 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:29:56,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703097063] [2021-12-28 00:29:56,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703097063] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:29:56,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 00:29:56,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 00:29:56,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853908085] [2021-12-28 00:29:56,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:29:56,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 00:29:56,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:29:56,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 00:29:56,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 00:29:56,176 INFO L87 Difference]: Start difference. First operand 91 states and 117 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 00:29:56,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:29:56,231 INFO L93 Difference]: Finished difference Result 133 states and 172 transitions. [2021-12-28 00:29:56,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 00:29:56,231 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2021-12-28 00:29:56,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:29:56,233 INFO L225 Difference]: With dead ends: 133 [2021-12-28 00:29:56,233 INFO L226 Difference]: Without dead ends: 121 [2021-12-28 00:29:56,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-28 00:29:56,234 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 00:29:56,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 91 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 00:29:56,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-28 00:29:56,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 105. [2021-12-28 00:29:56,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 82 states have (on average 1.3048780487804879) internal successors, (107), 84 states have internal predecessors, (107), 15 states have call successors, (15), 8 states have call predecessors, (15), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-28 00:29:56,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 135 transitions. [2021-12-28 00:29:56,252 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 135 transitions. Word has length 32 [2021-12-28 00:29:56,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:29:56,253 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 135 transitions. [2021-12-28 00:29:56,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 00:29:56,253 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 135 transitions. [2021-12-28 00:29:56,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-28 00:29:56,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:29:56,255 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:29:56,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-28 00:29:56,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:29:56,471 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:29:56,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:29:56,472 INFO L85 PathProgramCache]: Analyzing trace with hash 346264643, now seen corresponding path program 1 times [2021-12-28 00:29:56,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:29:56,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318749756] [2021-12-28 00:29:56,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:29:56,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:29:56,479 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:29:56,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [907407738] [2021-12-28 00:29:56,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:29:56,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:29:56,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:29:56,487 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 00:29:56,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-28 00:29:56,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:29:56,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-28 00:29:56,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:29:56,704 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-28 00:29:56,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:29:56,779 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-28 00:29:56,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:29:56,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318749756] [2021-12-28 00:29:56,780 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:29:56,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907407738] [2021-12-28 00:29:56,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907407738] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-28 00:29:56,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 00:29:56,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2021-12-28 00:29:56,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97237322] [2021-12-28 00:29:56,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:29:56,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 00:29:56,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:29:56,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 00:29:56,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-28 00:29:56,782 INFO L87 Difference]: Start difference. First operand 105 states and 135 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 00:29:56,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:29:56,983 INFO L93 Difference]: Finished difference Result 112 states and 141 transitions. [2021-12-28 00:29:56,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 00:29:56,983 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2021-12-28 00:29:56,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:29:56,984 INFO L225 Difference]: With dead ends: 112 [2021-12-28 00:29:56,984 INFO L226 Difference]: Without dead ends: 92 [2021-12-28 00:29:56,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-28 00:29:56,985 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 5 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 00:29:56,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 94 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 00:29:56,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-28 00:29:56,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 58. [2021-12-28 00:29:56,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 47 states have internal predecessors, (60), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-28 00:29:56,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2021-12-28 00:29:56,994 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 32 [2021-12-28 00:29:56,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:29:56,995 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2021-12-28 00:29:56,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 00:29:56,995 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2021-12-28 00:29:56,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-28 00:29:56,996 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:29:56,996 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:29:57,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-28 00:29:57,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:29:57,220 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:29:57,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:29:57,220 INFO L85 PathProgramCache]: Analyzing trace with hash 136508765, now seen corresponding path program 2 times [2021-12-28 00:29:57,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:29:57,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652174159] [2021-12-28 00:29:57,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:29:57,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:29:57,228 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:29:57,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [153079009] [2021-12-28 00:29:57,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 00:29:57,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:29:57,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:29:57,236 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) [2021-12-28 00:29:57,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-28 00:29:57,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 00:29:57,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 00:29:57,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-28 00:29:57,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:29:57,387 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 00:29:57,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:29:57,518 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-28 00:29:57,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:29:57,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652174159] [2021-12-28 00:29:57,518 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:29:57,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153079009] [2021-12-28 00:29:57,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153079009] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 00:29:57,519 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 00:29:57,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-12-28 00:29:57,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632778139] [2021-12-28 00:29:57,519 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 00:29:57,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-28 00:29:57,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:29:57,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-28 00:29:57,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-12-28 00:29:57,521 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-28 00:29:57,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:29:57,679 INFO L93 Difference]: Finished difference Result 132 states and 169 transitions. [2021-12-28 00:29:57,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-28 00:29:57,680 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 46 [2021-12-28 00:29:57,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:29:57,681 INFO L225 Difference]: With dead ends: 132 [2021-12-28 00:29:57,681 INFO L226 Difference]: Without dead ends: 124 [2021-12-28 00:29:57,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2021-12-28 00:29:57,682 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 129 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 00:29:57,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 196 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 00:29:57,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-28 00:29:57,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-12-28 00:29:57,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 100 states have (on average 1.32) internal successors, (132), 101 states have internal predecessors, (132), 12 states have call successors, (12), 11 states have call predecessors, (12), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-28 00:29:57,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 155 transitions. [2021-12-28 00:29:57,696 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 155 transitions. Word has length 46 [2021-12-28 00:29:57,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:29:57,696 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 155 transitions. [2021-12-28 00:29:57,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-28 00:29:57,697 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 155 transitions. [2021-12-28 00:29:57,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-28 00:29:57,699 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:29:57,699 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:29:57,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-28 00:29:57,915 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,SelfDestructingSolverStorable9 [2021-12-28 00:29:57,916 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:29:57,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:29:57,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1689445411, now seen corresponding path program 3 times [2021-12-28 00:29:57,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:29:57,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391789604] [2021-12-28 00:29:57,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:29:57,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:29:57,925 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:29:57,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [961083692] [2021-12-28 00:29:57,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-28 00:29:57,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:29:57,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:29:57,931 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) [2021-12-28 00:29:57,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-28 00:29:58,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-28 00:29:58,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 00:29:58,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-28 00:29:58,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:29:58,435 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 20 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 00:29:58,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:29:58,777 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 20 proven. 245 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-28 00:29:58,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:29:58,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391789604] [2021-12-28 00:29:58,778 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:29:58,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961083692] [2021-12-28 00:29:58,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961083692] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 00:29:58,778 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 00:29:58,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-12-28 00:29:58,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137008249] [2021-12-28 00:29:58,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 00:29:58,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-28 00:29:58,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:29:58,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-28 00:29:58,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2021-12-28 00:29:58,781 INFO L87 Difference]: Start difference. First operand 124 states and 155 transitions. Second operand has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-28 00:29:59,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:29:59,166 INFO L93 Difference]: Finished difference Result 264 states and 343 transitions. [2021-12-28 00:29:59,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-28 00:29:59,166 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 100 [2021-12-28 00:29:59,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:29:59,173 INFO L225 Difference]: With dead ends: 264 [2021-12-28 00:29:59,173 INFO L226 Difference]: Without dead ends: 256 [2021-12-28 00:29:59,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=796, Invalid=1366, Unknown=0, NotChecked=0, Total=2162 [2021-12-28 00:29:59,175 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 387 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 00:29:59,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 333 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 00:29:59,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-12-28 00:29:59,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2021-12-28 00:29:59,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 208 states have (on average 1.3269230769230769) internal successors, (276), 209 states have internal predecessors, (276), 24 states have call successors, (24), 23 states have call predecessors, (24), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-12-28 00:29:59,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 323 transitions. [2021-12-28 00:29:59,207 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 323 transitions. Word has length 100 [2021-12-28 00:29:59,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:29:59,207 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 323 transitions. [2021-12-28 00:29:59,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-28 00:29:59,208 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 323 transitions. [2021-12-28 00:29:59,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-12-28 00:29:59,219 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:29:59,219 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:29:59,226 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-28 00:29:59,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:29:59,426 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:29:59,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:29:59,427 INFO L85 PathProgramCache]: Analyzing trace with hash 482330845, now seen corresponding path program 4 times [2021-12-28 00:29:59,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:29:59,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020191837] [2021-12-28 00:29:59,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:29:59,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:29:59,441 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:29:59,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2127040313] [2021-12-28 00:29:59,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-28 00:29:59,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:29:59,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:29:59,443 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) [2021-12-28 00:29:59,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-28 00:29:59,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-28 00:29:59,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 00:29:59,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-28 00:29:59,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:30:00,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2167 backedges. 44 proven. 2123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 00:30:00,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:30:01,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2167 backedges. 44 proven. 1199 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2021-12-28 00:30:01,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:30:01,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020191837] [2021-12-28 00:30:01,240 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:30:01,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127040313] [2021-12-28 00:30:01,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127040313] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 00:30:01,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 00:30:01,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 50 [2021-12-28 00:30:01,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773391300] [2021-12-28 00:30:01,241 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 00:30:01,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-28 00:30:01,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:30:01,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-28 00:30:01,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2021-12-28 00:30:01,244 INFO L87 Difference]: Start difference. First operand 256 states and 323 transitions. Second operand has 50 states, 50 states have (on average 5.2) internal successors, (260), 50 states have internal predecessors, (260), 45 states have call successors, (45), 24 states have call predecessors, (45), 23 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2021-12-28 00:30:02,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:30:02,718 INFO L93 Difference]: Finished difference Result 528 states and 691 transitions. [2021-12-28 00:30:02,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-12-28 00:30:02,719 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 5.2) internal successors, (260), 50 states have internal predecessors, (260), 45 states have call successors, (45), 24 states have call predecessors, (45), 23 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) Word has length 208 [2021-12-28 00:30:02,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:30:02,721 INFO L225 Difference]: With dead ends: 528 [2021-12-28 00:30:02,722 INFO L226 Difference]: Without dead ends: 520 [2021-12-28 00:30:02,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3316, Invalid=5614, Unknown=0, NotChecked=0, Total=8930 [2021-12-28 00:30:02,725 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 1344 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1344 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 00:30:02,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1344 Valid, 628 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 00:30:02,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-12-28 00:30:02,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 520. [2021-12-28 00:30:02,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 424 states have (on average 1.330188679245283) internal successors, (564), 425 states have internal predecessors, (564), 48 states have call successors, (48), 47 states have call predecessors, (48), 47 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2021-12-28 00:30:02,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 659 transitions. [2021-12-28 00:30:02,761 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 659 transitions. Word has length 208 [2021-12-28 00:30:02,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:30:02,762 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 659 transitions. [2021-12-28 00:30:02,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 5.2) internal successors, (260), 50 states have internal predecessors, (260), 45 states have call successors, (45), 24 states have call predecessors, (45), 23 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2021-12-28 00:30:02,763 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 659 transitions. [2021-12-28 00:30:02,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-12-28 00:30:02,769 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:30:02,769 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:30:02,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-28 00:30:02,987 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,SelfDestructingSolverStorable11 [2021-12-28 00:30:02,987 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:30:02,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:30:02,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1031888163, now seen corresponding path program 5 times [2021-12-28 00:30:02,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:30:02,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265983782] [2021-12-28 00:30:02,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:30:02,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:30:03,026 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:30:03,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1779830510] [2021-12-28 00:30:03,026 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-28 00:30:03,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:30:03,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:30:03,029 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) [2021-12-28 00:30:03,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-28 00:30:06,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2021-12-28 00:30:06,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 00:30:06,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 1254 conjuncts, 95 conjunts are in the unsatisfiable core [2021-12-28 00:30:06,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:30:07,874 INFO L134 CoverageAnalysis]: Checked inductivity of 9499 backedges. 92 proven. 9407 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 00:30:07,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:30:10,486 INFO L134 CoverageAnalysis]: Checked inductivity of 9499 backedges. 92 proven. 5267 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2021-12-28 00:30:10,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:30:10,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265983782] [2021-12-28 00:30:10,486 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:30:10,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779830510] [2021-12-28 00:30:10,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779830510] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 00:30:10,486 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 00:30:10,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 50] total 98 [2021-12-28 00:30:10,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478342980] [2021-12-28 00:30:10,487 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 00:30:10,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-12-28 00:30:10,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:30:10,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-12-28 00:30:10,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4565, Invalid=4941, Unknown=0, NotChecked=0, Total=9506 [2021-12-28 00:30:10,490 INFO L87 Difference]: Start difference. First operand 520 states and 659 transitions. Second operand has 98 states, 98 states have (on average 5.346938775510204) internal successors, (524), 98 states have internal predecessors, (524), 93 states have call successors, (93), 48 states have call predecessors, (93), 47 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2021-12-28 00:30:15,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:30:15,569 INFO L93 Difference]: Finished difference Result 1056 states and 1387 transitions. [2021-12-28 00:30:15,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2021-12-28 00:30:15,571 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 5.346938775510204) internal successors, (524), 98 states have internal predecessors, (524), 93 states have call successors, (93), 48 states have call predecessors, (93), 47 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) Word has length 424 [2021-12-28 00:30:15,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:30:15,577 INFO L225 Difference]: With dead ends: 1056 [2021-12-28 00:30:15,578 INFO L226 Difference]: Without dead ends: 1048 [2021-12-28 00:30:15,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 939 GetRequests, 750 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5452 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=13540, Invalid=22750, Unknown=0, NotChecked=0, Total=36290 [2021-12-28 00:30:15,586 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 3026 mSDsluCounter, 1110 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3026 SdHoareTripleChecker+Valid, 1225 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 471 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-28 00:30:15,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3026 Valid, 1225 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [471 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-28 00:30:15,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2021-12-28 00:30:15,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 1048. [2021-12-28 00:30:15,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 856 states have (on average 1.3317757009345794) internal successors, (1140), 857 states have internal predecessors, (1140), 96 states have call successors, (96), 95 states have call predecessors, (96), 95 states have return successors, (95), 95 states have call predecessors, (95), 95 states have call successors, (95) [2021-12-28 00:30:15,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 1331 transitions. [2021-12-28 00:30:15,672 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 1331 transitions. Word has length 424 [2021-12-28 00:30:15,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:30:15,673 INFO L470 AbstractCegarLoop]: Abstraction has 1048 states and 1331 transitions. [2021-12-28 00:30:15,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 5.346938775510204) internal successors, (524), 98 states have internal predecessors, (524), 93 states have call successors, (93), 48 states have call predecessors, (93), 47 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2021-12-28 00:30:15,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 1331 transitions. [2021-12-28 00:30:15,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 857 [2021-12-28 00:30:15,700 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:30:15,700 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 94, 94, 94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:30:15,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-28 00:30:15,912 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,SelfDestructingSolverStorable12 [2021-12-28 00:30:15,913 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:30:15,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:30:15,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1549948637, now seen corresponding path program 6 times [2021-12-28 00:30:15,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:30:15,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669852483] [2021-12-28 00:30:15,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:30:15,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:30:15,950 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:30:15,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [999865777] [2021-12-28 00:30:15,951 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-28 00:30:15,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:30:15,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:30:15,952 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) [2021-12-28 00:30:15,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process