./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound5.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a93c350e5795e32421c3bef9d7525c3fd53f570f971d574def19132b3d6f08b8 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 00:25:55,325 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 00:25:55,327 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 00:25:55,364 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 00:25:55,364 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 00:25:55,367 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 00:25:55,368 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 00:25:55,371 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 00:25:55,372 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 00:25:55,376 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 00:25:55,377 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 00:25:55,378 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 00:25:55,378 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 00:25:55,380 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 00:25:55,381 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 00:25:55,385 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 00:25:55,387 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 00:25:55,387 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 00:25:55,389 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 00:25:55,391 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 00:25:55,393 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 00:25:55,394 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 00:25:55,395 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 00:25:55,395 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 00:25:55,398 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 00:25:55,399 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 00:25:55,399 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 00:25:55,400 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 00:25:55,400 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 00:25:55,401 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 00:25:55,401 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 00:25:55,402 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 00:25:55,403 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 00:25:55,403 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 00:25:55,404 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 00:25:55,404 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 00:25:55,405 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 00:25:55,405 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 00:25:55,405 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 00:25:55,405 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 00:25:55,406 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 00:25:55,406 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 00:25:55,428 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 00:25:55,430 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 00:25:55,431 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 00:25:55,431 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 00:25:55,432 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 00:25:55,432 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 00:25:55,433 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 00:25:55,433 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 00:25:55,433 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 00:25:55,433 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 00:25:55,434 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 00:25:55,434 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 00:25:55,434 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 00:25:55,434 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 00:25:55,434 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 00:25:55,434 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 00:25:55,435 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 00:25:55,435 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 00:25:55,435 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 00:25:55,435 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 00:25:55,435 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 00:25:55,435 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 00:25:55,435 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 00:25:55,436 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 00:25:55,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 00:25:55,436 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 00:25:55,436 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 00:25:55,436 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 00:25:55,436 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 00:25:55,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 00:25:55,437 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 00:25:55,437 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 00:25:55,437 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 00:25:55,437 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 00:25:55,437 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a93c350e5795e32421c3bef9d7525c3fd53f570f971d574def19132b3d6f08b8 [2021-12-16 00:25:55,617 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 00:25:55,639 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 00:25:55,640 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 00:25:55,641 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 00:25:55,642 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 00:25:55,643 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound5.c [2021-12-16 00:25:55,694 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d74eba6a/77685bb13e384134a2f887e2bedfd84a/FLAGf9cc1b6ea [2021-12-16 00:25:56,048 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 00:25:56,049 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound5.c [2021-12-16 00:25:56,060 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d74eba6a/77685bb13e384134a2f887e2bedfd84a/FLAGf9cc1b6ea [2021-12-16 00:25:56,480 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d74eba6a/77685bb13e384134a2f887e2bedfd84a [2021-12-16 00:25:56,482 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 00:25:56,483 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 00:25:56,485 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 00:25:56,485 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 00:25:56,487 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 00:25:56,487 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 12:25:56" (1/1) ... [2021-12-16 00:25:56,488 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b3a2654 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:25:56, skipping insertion in model container [2021-12-16 00:25:56,488 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 12:25:56" (1/1) ... [2021-12-16 00:25:56,493 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 00:25:56,504 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 00:25:56,622 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/hard-ll_valuebound5.c[538,551] [2021-12-16 00:25:56,631 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 00:25:56,636 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 00:25:56,643 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/hard-ll_valuebound5.c[538,551] [2021-12-16 00:25:56,651 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 00:25:56,659 INFO L208 MainTranslator]: Completed translation [2021-12-16 00:25:56,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:25:56 WrapperNode [2021-12-16 00:25:56,659 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 00:25:56,660 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 00:25:56,660 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 00:25:56,660 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 00:25:56,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:25:56" (1/1) ... [2021-12-16 00:25:56,669 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:25:56" (1/1) ... [2021-12-16 00:25:56,679 INFO L137 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 55 [2021-12-16 00:25:56,680 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 00:25:56,680 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 00:25:56,680 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 00:25:56,680 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 00:25:56,686 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:25:56" (1/1) ... [2021-12-16 00:25:56,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:25:56" (1/1) ... [2021-12-16 00:25:56,687 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:25:56" (1/1) ... [2021-12-16 00:25:56,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:25:56" (1/1) ... [2021-12-16 00:25:56,689 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:25:56" (1/1) ... [2021-12-16 00:25:56,691 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:25:56" (1/1) ... [2021-12-16 00:25:56,692 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:25:56" (1/1) ... [2021-12-16 00:25:56,694 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 00:25:56,695 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 00:25:56,695 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 00:25:56,695 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 00:25:56,696 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:25:56" (1/1) ... [2021-12-16 00:25:56,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 00:25:56,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:25:56,724 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) [2021-12-16 00:25:56,731 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 [2021-12-16 00:25:56,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 00:25:56,750 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-16 00:25:56,750 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-16 00:25:56,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 00:25:56,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 00:25:56,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 00:25:56,750 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-16 00:25:56,750 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-16 00:25:56,794 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 00:25:56,795 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 00:25:56,874 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 00:25:56,884 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 00:25:56,884 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-16 00:25:56,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 12:25:56 BoogieIcfgContainer [2021-12-16 00:25:56,886 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 00:25:56,887 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 00:25:56,887 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 00:25:56,890 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 00:25:56,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 12:25:56" (1/3) ... [2021-12-16 00:25:56,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b54f301 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 12:25:56, skipping insertion in model container [2021-12-16 00:25:56,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:25:56" (2/3) ... [2021-12-16 00:25:56,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b54f301 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 12:25:56, skipping insertion in model container [2021-12-16 00:25:56,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 12:25:56" (3/3) ... [2021-12-16 00:25:56,892 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound5.c [2021-12-16 00:25:56,896 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 00:25:56,896 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 00:25:56,958 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 00:25:56,963 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 [2021-12-16 00:25:56,964 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 00:25:56,974 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-16 00:25:56,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-16 00:25:56,979 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:25:56,979 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:25:56,980 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:25:56,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:25:56,984 INFO L85 PathProgramCache]: Analyzing trace with hash -487550744, now seen corresponding path program 1 times [2021-12-16 00:25:56,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:25:56,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270943724] [2021-12-16 00:25:56,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:25:56,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:25:57,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:25:57,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 00:25:57,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:25:57,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:25:57,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:25:57,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 00:25:57,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:25:57,161 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 00:25:57,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:25:57,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270943724] [2021-12-16 00:25:57,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270943724] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:25:57,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 00:25:57,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 00:25:57,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059496078] [2021-12-16 00:25:57,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:25:57,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 00:25:57,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:25:57,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 00:25:57,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 00:25:57,195 INFO L87 Difference]: Start difference. First operand has 33 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 00:25:57,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:25:57,217 INFO L93 Difference]: Finished difference Result 63 states and 104 transitions. [2021-12-16 00:25:57,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 00:25:57,219 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-12-16 00:25:57,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:25:57,223 INFO L225 Difference]: With dead ends: 63 [2021-12-16 00:25:57,223 INFO L226 Difference]: Without dead ends: 29 [2021-12-16 00:25:57,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 00:25:57,232 INFO L933 BasicCegarLoop]: 43 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, 43 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 [2021-12-16 00:25:57,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:25:57,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-16 00:25:57,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-12-16 00:25:57,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-16 00:25:57,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2021-12-16 00:25:57,264 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 24 [2021-12-16 00:25:57,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:25:57,267 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2021-12-16 00:25:57,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 00:25:57,268 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2021-12-16 00:25:57,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-16 00:25:57,270 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:25:57,270 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:25:57,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 00:25:57,271 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:25:57,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:25:57,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1636258074, now seen corresponding path program 1 times [2021-12-16 00:25:57,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:25:57,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747504679] [2021-12-16 00:25:57,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:25:57,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:25:57,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:25:57,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 00:25:57,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:25:57,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:25:57,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:25:57,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 00:25:57,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:25:57,383 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 00:25:57,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:25:57,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747504679] [2021-12-16 00:25:57,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747504679] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:25:57,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 00:25:57,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 00:25:57,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153764158] [2021-12-16 00:25:57,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:25:57,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 00:25:57,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:25:57,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 00:25:57,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 00:25:57,386 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 00:25:57,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:25:57,428 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2021-12-16 00:25:57,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 00:25:57,428 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-12-16 00:25:57,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:25:57,429 INFO L225 Difference]: With dead ends: 42 [2021-12-16 00:25:57,430 INFO L226 Difference]: Without dead ends: 40 [2021-12-16 00:25:57,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 00:25:57,431 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:25:57,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 134 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:25:57,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-16 00:25:57,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2021-12-16 00:25:57,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-16 00:25:57,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2021-12-16 00:25:57,437 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 24 [2021-12-16 00:25:57,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:25:57,437 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2021-12-16 00:25:57,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 00:25:57,437 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2021-12-16 00:25:57,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-16 00:25:57,438 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:25:57,438 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:25:57,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 00:25:57,438 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:25:57,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:25:57,439 INFO L85 PathProgramCache]: Analyzing trace with hash 906849917, now seen corresponding path program 1 times [2021-12-16 00:25:57,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:25:57,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076917382] [2021-12-16 00:25:57,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:25:57,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:25:57,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:25:57,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 00:25:57,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:25:57,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:25:57,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:25:57,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 00:25:57,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:25:57,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-16 00:25:57,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:25:57,526 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 00:25:57,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:25:57,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076917382] [2021-12-16 00:25:57,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076917382] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:25:57,526 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 00:25:57,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 00:25:57,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443568386] [2021-12-16 00:25:57,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:25:57,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 00:25:57,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:25:57,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 00:25:57,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 00:25:57,528 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-16 00:25:57,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:25:57,564 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2021-12-16 00:25:57,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 00:25:57,565 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-12-16 00:25:57,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:25:57,565 INFO L225 Difference]: With dead ends: 46 [2021-12-16 00:25:57,565 INFO L226 Difference]: Without dead ends: 44 [2021-12-16 00:25:57,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 00:25:57,567 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:25:57,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 130 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:25:57,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-16 00:25:57,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-12-16 00:25:57,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-16 00:25:57,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2021-12-16 00:25:57,578 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 29 [2021-12-16 00:25:57,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:25:57,578 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2021-12-16 00:25:57,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-16 00:25:57,578 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2021-12-16 00:25:57,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-16 00:25:57,579 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:25:57,579 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:25:57,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 00:25:57,581 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:25:57,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:25:57,582 INFO L85 PathProgramCache]: Analyzing trace with hash 710995206, now seen corresponding path program 1 times [2021-12-16 00:25:57,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:25:57,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440051990] [2021-12-16 00:25:57,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:25:57,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:25:57,591 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 00:25:57,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [662814536] [2021-12-16 00:25:57,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:25:57,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:25:57,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:25:57,598 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) [2021-12-16 00:25:57,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 00:25:57,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:25:57,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 00:25:57,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:25:57,755 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-16 00:25:57,755 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:25:57,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:25:57,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440051990] [2021-12-16 00:25:57,756 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 00:25:57,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662814536] [2021-12-16 00:25:57,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662814536] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:25:57,756 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 00:25:57,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 00:25:57,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920045894] [2021-12-16 00:25:57,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:25:57,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 00:25:57,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:25:57,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 00:25:57,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 00:25:57,758 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 00:25:57,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:25:57,799 INFO L93 Difference]: Finished difference Result 65 states and 85 transitions. [2021-12-16 00:25:57,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 00:25:57,799 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-12-16 00:25:57,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:25:57,800 INFO L225 Difference]: With dead ends: 65 [2021-12-16 00:25:57,801 INFO L226 Difference]: Without dead ends: 51 [2021-12-16 00:25:57,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 00:25:57,802 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:25:57,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 141 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:25:57,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-16 00:25:57,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-12-16 00:25:57,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-16 00:25:57,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2021-12-16 00:25:57,809 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 34 [2021-12-16 00:25:57,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:25:57,810 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2021-12-16 00:25:57,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 00:25:57,810 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2021-12-16 00:25:57,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-16 00:25:57,811 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:25:57,811 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:25:57,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 00:25:58,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:25:58,028 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:25:58,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:25:58,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1829555286, now seen corresponding path program 1 times [2021-12-16 00:25:58,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:25:58,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475256406] [2021-12-16 00:25:58,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:25:58,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:25:58,037 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 00:25:58,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1109234330] [2021-12-16 00:25:58,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:25:58,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:25:58,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:25:58,043 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) [2021-12-16 00:25:58,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 00:25:58,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:25:58,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 00:25:58,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:25:58,364 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 00:25:58,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:25:58,496 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-16 00:25:58,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:25:58,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475256406] [2021-12-16 00:25:58,496 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 00:25:58,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109234330] [2021-12-16 00:25:58,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109234330] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-16 00:25:58,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:25:58,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2021-12-16 00:25:58,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687521198] [2021-12-16 00:25:58,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:25:58,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 00:25:58,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:25:58,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 00:25:58,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-16 00:25:58,497 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 00:25:58,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:25:58,547 INFO L93 Difference]: Finished difference Result 64 states and 81 transitions. [2021-12-16 00:25:58,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 00:25:58,549 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41 [2021-12-16 00:25:58,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:25:58,550 INFO L225 Difference]: With dead ends: 64 [2021-12-16 00:25:58,550 INFO L226 Difference]: Without dead ends: 62 [2021-12-16 00:25:58,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-16 00:25:58,551 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:25:58,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 158 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:25:58,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-16 00:25:58,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2021-12-16 00:25:58,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 35 states have (on average 1.2) internal successors, (42), 37 states have internal predecessors, (42), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-16 00:25:58,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions. [2021-12-16 00:25:58,557 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 41 [2021-12-16 00:25:58,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:25:58,558 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions. [2021-12-16 00:25:58,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 00:25:58,558 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions. [2021-12-16 00:25:58,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-16 00:25:58,559 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:25:58,559 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:25:58,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-16 00:25:58,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:25:58,778 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:25:58,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:25:58,778 INFO L85 PathProgramCache]: Analyzing trace with hash 105343995, now seen corresponding path program 1 times [2021-12-16 00:25:58,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:25:58,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130589499] [2021-12-16 00:25:58,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:25:58,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:25:58,786 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 00:25:58,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1131587619] [2021-12-16 00:25:58,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:25:58,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:25:58,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:25:58,787 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) [2021-12-16 00:25:58,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 00:25:58,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:25:58,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-16 00:25:58,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:25:58,945 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-16 00:25:58,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:25:59,047 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-16 00:25:59,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:25:59,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130589499] [2021-12-16 00:25:59,047 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 00:25:59,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131587619] [2021-12-16 00:25:59,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131587619] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-16 00:25:59,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:25:59,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-12-16 00:25:59,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025831099] [2021-12-16 00:25:59,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:25:59,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 00:25:59,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:25:59,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 00:25:59,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 00:25:59,049 INFO L87 Difference]: Start difference. First operand 60 states and 76 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 00:25:59,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:25:59,091 INFO L93 Difference]: Finished difference Result 72 states and 91 transitions. [2021-12-16 00:25:59,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 00:25:59,092 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 51 [2021-12-16 00:25:59,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:25:59,093 INFO L225 Difference]: With dead ends: 72 [2021-12-16 00:25:59,093 INFO L226 Difference]: Without dead ends: 70 [2021-12-16 00:25:59,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-16 00:25:59,093 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 8 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:25:59,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 125 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:25:59,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-16 00:25:59,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2021-12-16 00:25:59,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 42 states have internal predecessors, (46), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-16 00:25:59,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 84 transitions. [2021-12-16 00:25:59,103 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 84 transitions. Word has length 51 [2021-12-16 00:25:59,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:25:59,103 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 84 transitions. [2021-12-16 00:25:59,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 00:25:59,103 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 84 transitions. [2021-12-16 00:25:59,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-16 00:25:59,104 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:25:59,104 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:25:59,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 00:25:59,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:25:59,305 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:25:59,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:25:59,305 INFO L85 PathProgramCache]: Analyzing trace with hash 957489548, now seen corresponding path program 1 times [2021-12-16 00:25:59,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:25:59,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785606557] [2021-12-16 00:25:59,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:25:59,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:25:59,312 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 00:25:59,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1295845532] [2021-12-16 00:25:59,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:25:59,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:25:59,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:25:59,315 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) [2021-12-16 00:25:59,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 00:25:59,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:25:59,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 00:25:59,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:25:59,449 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-16 00:25:59,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:25:59,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:25:59,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785606557] [2021-12-16 00:25:59,451 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 00:25:59,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295845532] [2021-12-16 00:25:59,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295845532] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:25:59,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 00:25:59,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 00:25:59,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810598882] [2021-12-16 00:25:59,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:25:59,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 00:25:59,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:25:59,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 00:25:59,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 00:25:59,456 INFO L87 Difference]: Start difference. First operand 67 states and 84 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-16 00:25:59,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:25:59,496 INFO L93 Difference]: Finished difference Result 75 states and 92 transitions. [2021-12-16 00:25:59,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 00:25:59,497 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2021-12-16 00:25:59,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:25:59,500 INFO L225 Difference]: With dead ends: 75 [2021-12-16 00:25:59,500 INFO L226 Difference]: Without dead ends: 68 [2021-12-16 00:25:59,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 00:25:59,501 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 8 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:25:59,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 116 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:25:59,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-16 00:25:59,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-12-16 00:25:59,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 40 states have (on average 1.15) internal successors, (46), 43 states have internal predecessors, (46), 18 states have call successors, (18), 8 states have call predecessors, (18), 8 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2021-12-16 00:25:59,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2021-12-16 00:25:59,514 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 52 [2021-12-16 00:25:59,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:25:59,515 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2021-12-16 00:25:59,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-16 00:25:59,515 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2021-12-16 00:25:59,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-16 00:25:59,520 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:25:59,520 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:25:59,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 00:25:59,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:25:59,725 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:25:59,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:25:59,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1754894755, now seen corresponding path program 1 times [2021-12-16 00:25:59,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:25:59,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016736889] [2021-12-16 00:25:59,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:25:59,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:25:59,733 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 00:25:59,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1709254257] [2021-12-16 00:25:59,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:25:59,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:25:59,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:25:59,738 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) [2021-12-16 00:25:59,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 00:25:59,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:25:59,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-16 00:25:59,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:26:00,264 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-12-16 00:26:00,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:26:01,449 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-12-16 00:26:01,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:26:01,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016736889] [2021-12-16 00:26:01,449 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 00:26:01,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709254257] [2021-12-16 00:26:01,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709254257] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:26:01,450 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 00:26:01,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-12-16 00:26:01,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251044709] [2021-12-16 00:26:01,450 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 00:26:01,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-16 00:26:01,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:26:01,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-16 00:26:01,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-12-16 00:26:01,453 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2021-12-16 00:26:05,526 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-16 00:26:13,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:26:13,678 INFO L93 Difference]: Finished difference Result 146 states and 194 transitions. [2021-12-16 00:26:13,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-16 00:26:13,679 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) Word has length 71 [2021-12-16 00:26:13,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:26:13,680 INFO L225 Difference]: With dead ends: 146 [2021-12-16 00:26:13,680 INFO L226 Difference]: Without dead ends: 119 [2021-12-16 00:26:13,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 121 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2021-12-16 00:26:13,681 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 70 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 148 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-12-16 00:26:13,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 287 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 479 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2021-12-16 00:26:13,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-16 00:26:13,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 99. [2021-12-16 00:26:13,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 59 states have (on average 1.152542372881356) internal successors, (68), 64 states have internal predecessors, (68), 28 states have call successors, (28), 11 states have call predecessors, (28), 11 states have return successors, (27), 23 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-16 00:26:13,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 123 transitions. [2021-12-16 00:26:13,691 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 123 transitions. Word has length 71 [2021-12-16 00:26:13,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:26:13,691 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 123 transitions. [2021-12-16 00:26:13,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2021-12-16 00:26:13,691 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 123 transitions. [2021-12-16 00:26:13,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-16 00:26:13,692 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:26:13,692 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:26:13,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 00:26:13,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:26:13,893 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:26:13,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:26:13,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1620227847, now seen corresponding path program 1 times [2021-12-16 00:26:13,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:26:13,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628268672] [2021-12-16 00:26:13,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:26:13,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:26:13,900 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 00:26:13,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1030977182] [2021-12-16 00:26:13,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:26:13,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:26:13,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:26:13,919 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) [2021-12-16 00:26:13,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 00:26:13,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:26:13,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-16 00:26:13,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:26:14,401 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-12-16 00:26:14,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:26:16,909 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-12-16 00:26:16,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:26:16,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628268672] [2021-12-16 00:26:16,909 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 00:26:16,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030977182] [2021-12-16 00:26:16,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030977182] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:26:16,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 00:26:16,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-12-16 00:26:16,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960522212] [2021-12-16 00:26:16,910 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 00:26:16,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-16 00:26:16,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:26:16,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-16 00:26:16,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-12-16 00:26:16,911 INFO L87 Difference]: Start difference. First operand 99 states and 123 transitions. Second operand has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 11 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2021-12-16 00:26:17,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:26:17,630 INFO L93 Difference]: Finished difference Result 139 states and 171 transitions. [2021-12-16 00:26:17,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 00:26:17,630 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 11 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) Word has length 82 [2021-12-16 00:26:17,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:26:17,631 INFO L225 Difference]: With dead ends: 139 [2021-12-16 00:26:17,631 INFO L226 Difference]: Without dead ends: 103 [2021-12-16 00:26:17,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-12-16 00:26:17,632 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 20 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-16 00:26:17,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 341 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-16 00:26:17,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-16 00:26:17,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 91. [2021-12-16 00:26:17,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 58 states have internal predecessors, (62), 24 states have call successors, (24), 11 states have call predecessors, (24), 11 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2021-12-16 00:26:17,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 109 transitions. [2021-12-16 00:26:17,640 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 109 transitions. Word has length 82 [2021-12-16 00:26:17,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:26:17,640 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 109 transitions. [2021-12-16 00:26:17,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 11 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2021-12-16 00:26:17,640 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 109 transitions. [2021-12-16 00:26:17,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-16 00:26:17,641 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:26:17,641 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:26:17,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 00:26:17,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:26:17,857 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:26:17,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:26:17,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1888027627, now seen corresponding path program 2 times [2021-12-16 00:26:17,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:26:17,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930233206] [2021-12-16 00:26:17,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:26:17,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:26:17,864 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 00:26:17,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [303190152] [2021-12-16 00:26:17,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 00:26:17,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:26:17,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:26:17,865 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) [2021-12-16 00:26:17,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 00:26:17,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 00:26:17,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 00:26:17,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 00:26:17,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:26:18,002 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-12-16 00:26:18,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:26:18,146 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-12-16 00:26:18,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:26:18,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930233206] [2021-12-16 00:26:18,147 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 00:26:18,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303190152] [2021-12-16 00:26:18,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303190152] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:26:18,147 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 00:26:18,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-12-16 00:26:18,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136357161] [2021-12-16 00:26:18,148 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 00:26:18,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 00:26:18,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:26:18,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 00:26:18,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 00:26:18,149 INFO L87 Difference]: Start difference. First operand 91 states and 109 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-12-16 00:26:18,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:26:18,208 INFO L93 Difference]: Finished difference Result 115 states and 140 transitions. [2021-12-16 00:26:18,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 00:26:18,209 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 84 [2021-12-16 00:26:18,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:26:18,209 INFO L225 Difference]: With dead ends: 115 [2021-12-16 00:26:18,209 INFO L226 Difference]: Without dead ends: 96 [2021-12-16 00:26:18,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 00:26:18,210 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 1 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:26:18,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 165 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:26:18,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-16 00:26:18,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-12-16 00:26:18,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 61 states have internal predecessors, (65), 26 states have call successors, (26), 11 states have call predecessors, (26), 11 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-16 00:26:18,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 116 transitions. [2021-12-16 00:26:18,218 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 116 transitions. Word has length 84 [2021-12-16 00:26:18,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:26:18,218 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 116 transitions. [2021-12-16 00:26:18,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-12-16 00:26:18,219 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 116 transitions. [2021-12-16 00:26:18,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-16 00:26:18,219 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:26:18,219 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:26:18,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 00:26:18,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:26:18,435 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:26:18,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:26:18,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1729716470, now seen corresponding path program 1 times [2021-12-16 00:26:18,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:26:18,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588234610] [2021-12-16 00:26:18,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:26:18,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:26:18,441 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 00:26:18,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [423055205] [2021-12-16 00:26:18,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:26:18,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:26:18,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:26:18,443 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) [2021-12-16 00:26:18,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 00:26:18,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:26:18,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-16 00:26:18,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:26:18,677 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-12-16 00:26:18,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:26:19,020 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-12-16 00:26:19,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:26:19,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588234610] [2021-12-16 00:26:19,021 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 00:26:19,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423055205] [2021-12-16 00:26:19,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423055205] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:26:19,021 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 00:26:19,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-12-16 00:26:19,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046218305] [2021-12-16 00:26:19,021 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 00:26:19,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-16 00:26:19,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:26:19,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-16 00:26:19,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-16 00:26:19,022 INFO L87 Difference]: Start difference. First operand 96 states and 116 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 8 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2021-12-16 00:26:19,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:26:19,327 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2021-12-16 00:26:19,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 00:26:19,328 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 8 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) Word has length 87 [2021-12-16 00:26:19,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:26:19,329 INFO L225 Difference]: With dead ends: 104 [2021-12-16 00:26:19,329 INFO L226 Difference]: Without dead ends: 87 [2021-12-16 00:26:19,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 161 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-12-16 00:26:19,329 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 12 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 00:26:19,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 258 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 00:26:19,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-16 00:26:19,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-12-16 00:26:19,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 56 states have internal predecessors, (59), 22 states have call successors, (22), 11 states have call predecessors, (22), 11 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-16 00:26:19,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2021-12-16 00:26:19,336 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 87 [2021-12-16 00:26:19,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:26:19,336 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2021-12-16 00:26:19,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 8 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2021-12-16 00:26:19,336 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2021-12-16 00:26:19,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-16 00:26:19,337 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:26:19,337 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:26:19,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-16 00:26:19,551 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,SelfDestructingSolverStorable10 [2021-12-16 00:26:19,552 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:26:19,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:26:19,552 INFO L85 PathProgramCache]: Analyzing trace with hash -219918921, now seen corresponding path program 1 times [2021-12-16 00:26:19,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:26:19,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902246288] [2021-12-16 00:26:19,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:26:19,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:26:19,565 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 00:26:19,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1992983204] [2021-12-16 00:26:19,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:26:19,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:26:19,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:26:19,568 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) [2021-12-16 00:26:19,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 00:26:19,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:26:19,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 00:26:19,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:26:19,739 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2021-12-16 00:26:19,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:26:19,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:26:19,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902246288] [2021-12-16 00:26:19,739 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 00:26:19,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992983204] [2021-12-16 00:26:19,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992983204] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:26:19,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 00:26:19,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 00:26:19,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176627879] [2021-12-16 00:26:19,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:26:19,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 00:26:19,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:26:19,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 00:26:19,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-16 00:26:19,741 INFO L87 Difference]: Start difference. First operand 87 states and 102 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-12-16 00:26:19,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:26:19,772 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2021-12-16 00:26:19,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 00:26:19,772 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 91 [2021-12-16 00:26:19,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:26:19,773 INFO L225 Difference]: With dead ends: 94 [2021-12-16 00:26:19,773 INFO L226 Difference]: Without dead ends: 82 [2021-12-16 00:26:19,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-16 00:26:19,774 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 8 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:26:19,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 116 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:26:19,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-16 00:26:19,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-12-16 00:26:19,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 50 states have (on average 1.08) internal successors, (54), 52 states have internal predecessors, (54), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-16 00:26:19,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2021-12-16 00:26:19,780 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 91 [2021-12-16 00:26:19,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:26:19,780 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2021-12-16 00:26:19,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-12-16 00:26:19,780 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2021-12-16 00:26:19,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-16 00:26:19,781 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:26:19,781 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:26:19,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-16 00:26:19,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:26:19,997 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:26:19,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:26:19,997 INFO L85 PathProgramCache]: Analyzing trace with hash -2103086134, now seen corresponding path program 3 times [2021-12-16 00:26:19,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:26:19,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466986656] [2021-12-16 00:26:19,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:26:19,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:26:20,002 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 00:26:20,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1655107997] [2021-12-16 00:26:20,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 00:26:20,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:26:20,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:26:20,004 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) [2021-12-16 00:26:20,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 00:26:20,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-16 00:26:20,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 00:26:20,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-16 00:26:20,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:26:20,718 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 29 proven. 27 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2021-12-16 00:26:20,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:26:39,741 WARN L227 SmtUtils]: Spent 5.38s on a formula simplification that was a NOOP. DAG size: 132 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)