./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound50.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/ps5-ll_unwindbound50.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 a70bdaebce973cfb63a6da68866c665cdef037b6b862a38db5ed10fbf681a6e5 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 14:01:11,428 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 14:01:11,429 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 14:01:11,516 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 14:01:11,517 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 14:01:11,528 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 14:01:11,529 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 14:01:11,530 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 14:01:11,531 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 14:01:11,531 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 14:01:11,532 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 14:01:11,533 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 14:01:11,533 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 14:01:11,534 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 14:01:11,535 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 14:01:11,535 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 14:01:11,536 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 14:01:11,536 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 14:01:11,538 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 14:01:11,539 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 14:01:11,540 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 14:01:11,540 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 14:01:11,541 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 14:01:11,555 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 14:01:11,557 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 14:01:11,557 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 14:01:11,558 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 14:01:11,558 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 14:01:11,559 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 14:01:11,559 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 14:01:11,559 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 14:01:11,560 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 14:01:11,560 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 14:01:11,561 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 14:01:11,562 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 14:01:11,562 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 14:01:11,562 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 14:01:11,562 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 14:01:11,563 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 14:01:11,563 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 14:01:11,564 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 14:01:11,564 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 14:01:11,578 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 14:01:11,583 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 14:01:11,584 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 14:01:11,584 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 14:01:11,585 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 14:01:11,585 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 14:01:11,585 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 14:01:11,586 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 14:01:11,586 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 14:01:11,586 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 14:01:11,586 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 14:01:11,587 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 14:01:11,587 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 14:01:11,587 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 14:01:11,587 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 14:01:11,587 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 14:01:11,587 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 14:01:11,588 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 14:01:11,588 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 14:01:11,588 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 14:01:11,588 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 14:01:11,588 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 14:01:11,588 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 14:01:11,588 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 14:01:11,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 14:01:11,589 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 14:01:11,589 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 14:01:11,590 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 14:01:11,590 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 14:01:11,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 14:01:11,590 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 14:01:11,590 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 14:01:11,590 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 14:01:11,591 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 14:01:11,591 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a70bdaebce973cfb63a6da68866c665cdef037b6b862a38db5ed10fbf681a6e5 [2021-12-17 14:01:11,799 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 14:01:11,824 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 14:01:11,826 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 14:01:11,827 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 14:01:11,827 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 14:01:11,828 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound50.c [2021-12-17 14:01:11,877 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fbe72cc8/ae5f3256b056499a88de1d7d0784ea5e/FLAG79233aa33 [2021-12-17 14:01:12,200 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 14:01:12,200 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound50.c [2021-12-17 14:01:12,204 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fbe72cc8/ae5f3256b056499a88de1d7d0784ea5e/FLAG79233aa33 [2021-12-17 14:01:12,212 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fbe72cc8/ae5f3256b056499a88de1d7d0784ea5e [2021-12-17 14:01:12,213 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 14:01:12,214 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 14:01:12,215 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 14:01:12,215 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 14:01:12,217 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 14:01:12,218 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 02:01:12" (1/1) ... [2021-12-17 14:01:12,219 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b53c736 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:01:12, skipping insertion in model container [2021-12-17 14:01:12,219 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 02:01:12" (1/1) ... [2021-12-17 14:01:12,223 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 14:01:12,243 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 14:01:12,348 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/ps5-ll_unwindbound50.c[458,471] [2021-12-17 14:01:12,369 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 14:01:12,374 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 14:01:12,383 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/ps5-ll_unwindbound50.c[458,471] [2021-12-17 14:01:12,396 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 14:01:12,405 INFO L208 MainTranslator]: Completed translation [2021-12-17 14:01:12,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:01:12 WrapperNode [2021-12-17 14:01:12,406 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 14:01:12,407 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 14:01:12,407 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 14:01:12,407 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 14:01:12,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:01:12" (1/1) ... [2021-12-17 14:01:12,415 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:01:12" (1/1) ... [2021-12-17 14:01:12,429 INFO L137 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 43 [2021-12-17 14:01:12,429 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 14:01:12,430 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 14:01:12,430 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 14:01:12,430 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 14:01:12,435 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:01:12" (1/1) ... [2021-12-17 14:01:12,435 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:01:12" (1/1) ... [2021-12-17 14:01:12,442 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:01:12" (1/1) ... [2021-12-17 14:01:12,442 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:01:12" (1/1) ... [2021-12-17 14:01:12,449 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:01:12" (1/1) ... [2021-12-17 14:01:12,451 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:01:12" (1/1) ... [2021-12-17 14:01:12,453 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:01:12" (1/1) ... [2021-12-17 14:01:12,456 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 14:01:12,456 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 14:01:12,457 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 14:01:12,457 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 14:01:12,457 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:01:12" (1/1) ... [2021-12-17 14:01:12,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 14:01:12,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:01:12,478 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) [2021-12-17 14:01:12,514 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 [2021-12-17 14:01:12,524 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 14:01:12,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 14:01:12,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 14:01:12,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 14:01:12,525 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-17 14:01:12,525 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-17 14:01:12,563 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 14:01:12,564 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 14:01:12,653 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 14:01:12,657 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 14:01:12,657 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 14:01:12,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 02:01:12 BoogieIcfgContainer [2021-12-17 14:01:12,658 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 14:01:12,659 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 14:01:12,659 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 14:01:12,661 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 14:01:12,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 02:01:12" (1/3) ... [2021-12-17 14:01:12,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cc2a0fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 02:01:12, skipping insertion in model container [2021-12-17 14:01:12,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:01:12" (2/3) ... [2021-12-17 14:01:12,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cc2a0fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 02:01:12, skipping insertion in model container [2021-12-17 14:01:12,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 02:01:12" (3/3) ... [2021-12-17 14:01:12,663 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_unwindbound50.c [2021-12-17 14:01:12,666 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 14:01:12,666 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 14:01:12,708 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 14:01:12,712 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 [2021-12-17 14:01:12,713 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 14:01:12,735 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 14:01:12,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-17 14:01:12,738 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:01:12,738 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:01:12,738 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:01:12,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:01:12,742 INFO L85 PathProgramCache]: Analyzing trace with hash -579246775, now seen corresponding path program 1 times [2021-12-17 14:01:12,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:01:12,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466241438] [2021-12-17 14:01:12,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:01:12,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:01:12,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:01:12,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 14:01:12,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:01:12,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466241438] [2021-12-17 14:01:12,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466241438] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:01:12,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:01:12,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 14:01:12,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919877924] [2021-12-17 14:01:12,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:01:12,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 14:01:12,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:01:12,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 14:01:12,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 14:01:12,856 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 14:01:12,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:01:12,868 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2021-12-17 14:01:12,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 14:01:12,869 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-17 14:01:12,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:01:12,874 INFO L225 Difference]: With dead ends: 37 [2021-12-17 14:01:12,874 INFO L226 Difference]: Without dead ends: 16 [2021-12-17 14:01:12,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 14:01:12,882 INFO L933 BasicCegarLoop]: 23 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, 23 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 [2021-12-17 14:01:12,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:01:12,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-12-17 14:01:12,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-12-17 14:01:12,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 14:01:12,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-12-17 14:01:12,908 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2021-12-17 14:01:12,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:01:12,909 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-12-17 14:01:12,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 14:01:12,909 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-12-17 14:01:12,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-17 14:01:12,910 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:01:12,910 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:01:12,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 14:01:12,910 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:01:12,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:01:12,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1986551203, now seen corresponding path program 1 times [2021-12-17 14:01:12,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:01:12,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360401780] [2021-12-17 14:01:12,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:01:12,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:01:12,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:01:12,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 14:01:12,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:01:12,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360401780] [2021-12-17 14:01:12,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360401780] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:01:12,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:01:12,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 14:01:12,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080258953] [2021-12-17 14:01:12,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:01:12,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 14:01:12,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:01:12,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 14:01:12,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 14:01:12,953 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 14:01:12,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:01:12,963 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2021-12-17 14:01:12,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 14:01:12,964 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-17 14:01:12,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:01:12,964 INFO L225 Difference]: With dead ends: 26 [2021-12-17 14:01:12,965 INFO L226 Difference]: Without dead ends: 18 [2021-12-17 14:01:12,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 14:01:12,969 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:01:12,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:01:12,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-17 14:01:12,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-12-17 14:01:12,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 14:01:12,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-12-17 14:01:12,975 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 10 [2021-12-17 14:01:12,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:01:12,975 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-12-17 14:01:12,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 14:01:12,976 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-12-17 14:01:12,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-17 14:01:12,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:01:12,979 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:01:12,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 14:01:12,979 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:01:12,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:01:12,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1984763743, now seen corresponding path program 1 times [2021-12-17 14:01:12,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:01:12,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599578437] [2021-12-17 14:01:12,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:01:12,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:01:12,990 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:01:12,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [428272737] [2021-12-17 14:01:12,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:01:12,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:01:12,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:01:13,008 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) [2021-12-17 14:01:13,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 14:01:13,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:01:13,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 14:01:13,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:01:13,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 14:01:13,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:01:13,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:01:13,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599578437] [2021-12-17 14:01:13,108 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:01:13,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428272737] [2021-12-17 14:01:13,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428272737] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:01:13,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:01:13,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 14:01:13,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821204245] [2021-12-17 14:01:13,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:01:13,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 14:01:13,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:01:13,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 14:01:13,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 14:01:13,111 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 14:01:13,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:01:13,137 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2021-12-17 14:01:13,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 14:01:13,138 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-17 14:01:13,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:01:13,138 INFO L225 Difference]: With dead ends: 28 [2021-12-17 14:01:13,139 INFO L226 Difference]: Without dead ends: 24 [2021-12-17 14:01:13,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 14:01:13,140 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:01:13,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 62 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:01:13,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-17 14:01:13,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-12-17 14:01:13,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 14:01:13,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-12-17 14:01:13,144 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 10 [2021-12-17 14:01:13,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:01:13,144 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-12-17 14:01:13,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 14:01:13,145 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-12-17 14:01:13,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-17 14:01:13,145 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:01:13,145 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:01:13,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 14:01:13,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:01:13,367 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:01:13,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:01:13,367 INFO L85 PathProgramCache]: Analyzing trace with hash -69803837, now seen corresponding path program 1 times [2021-12-17 14:01:13,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:01:13,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014691805] [2021-12-17 14:01:13,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:01:13,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:01:13,375 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:01:13,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [794230090] [2021-12-17 14:01:13,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:01:13,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:01:13,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:01:13,396 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) [2021-12-17 14:01:13,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 14:01:13,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:01:13,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 14:01:13,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:01:13,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 14:01:13,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:01:13,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 14:01:13,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:01:13,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014691805] [2021-12-17 14:01:13,659 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:01:13,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794230090] [2021-12-17 14:01:13,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794230090] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 14:01:13,662 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 14:01:13,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-12-17 14:01:13,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851986582] [2021-12-17 14:01:13,663 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 14:01:13,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 14:01:13,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:01:13,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 14:01:13,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-17 14:01:13,666 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 14:01:13,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:01:13,736 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2021-12-17 14:01:13,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 14:01:13,736 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-12-17 14:01:13,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:01:13,737 INFO L225 Difference]: With dead ends: 58 [2021-12-17 14:01:13,738 INFO L226 Difference]: Without dead ends: 50 [2021-12-17 14:01:13,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-17 14:01:13,740 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 41 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:01:13,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 93 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:01:13,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-17 14:01:13,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2021-12-17 14:01:13,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 34 states have internal predecessors, (38), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-17 14:01:13,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2021-12-17 14:01:13,753 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 18 [2021-12-17 14:01:13,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:01:13,754 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2021-12-17 14:01:13,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 14:01:13,754 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2021-12-17 14:01:13,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-17 14:01:13,755 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:01:13,755 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:01:13,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 14:01:13,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-17 14:01:13,970 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:01:13,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:01:13,970 INFO L85 PathProgramCache]: Analyzing trace with hash -68016377, now seen corresponding path program 1 times [2021-12-17 14:01:13,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:01:13,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037292865] [2021-12-17 14:01:13,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:01:13,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:01:13,978 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:01:13,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [296088855] [2021-12-17 14:01:13,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:01:13,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:01:13,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:01:13,979 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) [2021-12-17 14:01:13,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 14:01:14,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:01:14,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-17 14:01:14,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:01:14,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 14:01:14,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:01:14,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 14:01:14,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:01:14,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037292865] [2021-12-17 14:01:14,189 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:01:14,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296088855] [2021-12-17 14:01:14,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296088855] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 14:01:14,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:01:14,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-12-17 14:01:14,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022464383] [2021-12-17 14:01:14,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:01:14,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 14:01:14,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:01:14,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 14:01:14,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 14:01:14,190 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 14:01:14,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:01:14,288 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2021-12-17 14:01:14,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 14:01:14,289 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-12-17 14:01:14,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:01:14,289 INFO L225 Difference]: With dead ends: 60 [2021-12-17 14:01:14,289 INFO L226 Difference]: Without dead ends: 52 [2021-12-17 14:01:14,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-17 14:01:14,290 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:01:14,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 47 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:01:14,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-17 14:01:14,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2021-12-17 14:01:14,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.121212121212121) internal successors, (37), 35 states have internal predecessors, (37), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-17 14:01:14,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2021-12-17 14:01:14,297 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 18 [2021-12-17 14:01:14,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:01:14,297 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2021-12-17 14:01:14,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 14:01:14,298 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2021-12-17 14:01:14,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-17 14:01:14,298 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:01:14,298 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:01:14,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-17 14:01:14,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:01:14,503 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:01:14,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:01:14,504 INFO L85 PathProgramCache]: Analyzing trace with hash 156635680, now seen corresponding path program 1 times [2021-12-17 14:01:14,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:01:14,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202059427] [2021-12-17 14:01:14,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:01:14,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:01:14,515 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:01:14,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1236970013] [2021-12-17 14:01:14,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:01:14,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:01:14,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:01:14,529 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) [2021-12-17 14:01:14,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 14:01:14,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:01:14,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-17 14:01:14,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:01:14,720 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 14:01:14,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:01:19,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:01:19,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202059427] [2021-12-17 14:01:19,439 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:01:19,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236970013] [2021-12-17 14:01:19,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236970013] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:01:19,439 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:01:19,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-12-17 14:01:19,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667692310] [2021-12-17 14:01:19,439 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 14:01:19,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 14:01:19,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:01:19,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 14:01:19,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:01:19,441 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 14:01:19,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:01:19,494 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2021-12-17 14:01:19,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 14:01:19,495 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2021-12-17 14:01:19,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:01:19,497 INFO L225 Difference]: With dead ends: 51 [2021-12-17 14:01:19,497 INFO L226 Difference]: Without dead ends: 45 [2021-12-17 14:01:19,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-17 14:01:19,498 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:01:19,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 111 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:01:19,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-17 14:01:19,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-12-17 14:01:19,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 14:01:19,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-12-17 14:01:19,515 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 29 [2021-12-17 14:01:19,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:01:19,515 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-12-17 14:01:19,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 14:01:19,516 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-12-17 14:01:19,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-17 14:01:19,517 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:01:19,517 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:01:19,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 14:01:19,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:01:19,751 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:01:19,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:01:19,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1793229318, now seen corresponding path program 2 times [2021-12-17 14:01:19,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:01:19,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580016] [2021-12-17 14:01:19,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:01:19,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:01:19,759 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:01:19,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1961605074] [2021-12-17 14:01:19,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 14:01:19,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:01:19,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:01:19,772 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) [2021-12-17 14:01:19,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 14:01:19,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 14:01:19,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 14:01:19,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-17 14:01:19,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:01:20,042 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 14:01:20,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:01:20,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:01:20,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580016] [2021-12-17 14:01:20,204 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:01:20,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961605074] [2021-12-17 14:01:20,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961605074] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:01:20,205 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:01:20,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-12-17 14:01:20,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740224386] [2021-12-17 14:01:20,205 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 14:01:20,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 14:01:20,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:01:20,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 14:01:20,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-17 14:01:20,208 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-17 14:01:20,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:01:20,273 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2021-12-17 14:01:20,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 14:01:20,274 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 37 [2021-12-17 14:01:20,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:01:20,275 INFO L225 Difference]: With dead ends: 50 [2021-12-17 14:01:20,275 INFO L226 Difference]: Without dead ends: 44 [2021-12-17 14:01:20,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-12-17 14:01:20,276 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:01:20,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 150 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:01:20,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-17 14:01:20,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-12-17 14:01:20,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 14:01:20,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-12-17 14:01:20,289 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 37 [2021-12-17 14:01:20,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:01:20,290 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-12-17 14:01:20,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-17 14:01:20,290 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-12-17 14:01:20,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-17 14:01:20,294 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:01:20,294 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:01:20,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 14:01:20,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:01:20,501 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:01:20,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:01:20,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1183870932, now seen corresponding path program 3 times [2021-12-17 14:01:20,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:01:20,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742279997] [2021-12-17 14:01:20,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:01:20,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:01:20,521 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:01:20,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [103931609] [2021-12-17 14:01:20,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 14:01:20,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:01:20,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:01:20,526 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) [2021-12-17 14:01:20,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 14:01:21,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-17 14:01:21,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 14:01:21,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-17 14:01:21,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:01:21,533 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 14:01:21,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:01:21,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:01:21,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742279997] [2021-12-17 14:01:21,638 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:01:21,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103931609] [2021-12-17 14:01:21,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103931609] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:01:21,639 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:01:21,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-12-17 14:01:21,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888004605] [2021-12-17 14:01:21,639 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 14:01:21,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 14:01:21,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:01:21,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 14:01:21,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-17 14:01:21,640 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 14:01:21,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:01:21,717 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2021-12-17 14:01:21,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 14:01:21,717 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 45 [2021-12-17 14:01:21,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:01:21,718 INFO L225 Difference]: With dead ends: 52 [2021-12-17 14:01:21,718 INFO L226 Difference]: Without dead ends: 46 [2021-12-17 14:01:21,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-12-17 14:01:21,719 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:01:21,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 202 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:01:21,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-17 14:01:21,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-12-17 14:01:21,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 14:01:21,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2021-12-17 14:01:21,723 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 45 [2021-12-17 14:01:21,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:01:21,724 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2021-12-17 14:01:21,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 14:01:21,724 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2021-12-17 14:01:21,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-17 14:01:21,724 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:01:21,725 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:01:21,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 14:01:21,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:01:21,931 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:01:21,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:01:21,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1854611729, now seen corresponding path program 1 times [2021-12-17 14:01:21,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:01:21,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255323796] [2021-12-17 14:01:21,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:01:21,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:01:21,946 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:01:21,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1205615071] [2021-12-17 14:01:21,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:01:21,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:01:21,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:01:21,949 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) [2021-12-17 14:01:21,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 14:01:21,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:01:21,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-17 14:01:21,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:01:22,105 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 14:01:22,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:01:22,205 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 14:01:22,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:01:22,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255323796] [2021-12-17 14:01:22,206 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:01:22,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205615071] [2021-12-17 14:01:22,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205615071] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 14:01:22,206 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 14:01:22,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-12-17 14:01:22,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663334895] [2021-12-17 14:01:22,206 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 14:01:22,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 14:01:22,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:01:22,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 14:01:22,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-12-17 14:01:22,208 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-12-17 14:01:22,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:01:22,380 INFO L93 Difference]: Finished difference Result 132 states and 144 transitions. [2021-12-17 14:01:22,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-17 14:01:22,380 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 47 [2021-12-17 14:01:22,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:01:22,381 INFO L225 Difference]: With dead ends: 132 [2021-12-17 14:01:22,381 INFO L226 Difference]: Without dead ends: 122 [2021-12-17 14:01:22,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2021-12-17 14:01:22,382 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 107 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:01:22,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 159 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:01:22,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-17 14:01:22,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 97. [2021-12-17 14:01:22,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 74 states have internal predecessors, (76), 17 states have call successors, (17), 11 states have call predecessors, (17), 10 states have return successors, (16), 11 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-17 14:01:22,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2021-12-17 14:01:22,390 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 47 [2021-12-17 14:01:22,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:01:22,390 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2021-12-17 14:01:22,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-12-17 14:01:22,391 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2021-12-17 14:01:22,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-17 14:01:22,391 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:01:22,392 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:01:22,408 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-17 14:01:22,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:01:22,615 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:01:22,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:01:22,616 INFO L85 PathProgramCache]: Analyzing trace with hash 348710830, now seen corresponding path program 4 times [2021-12-17 14:01:22,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:01:22,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752144792] [2021-12-17 14:01:22,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:01:22,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:01:22,621 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:01:22,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [261585648] [2021-12-17 14:01:22,622 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 14:01:22,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:01:22,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:01:22,626 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) [2021-12-17 14:01:22,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 14:01:22,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 14:01:22,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 14:01:22,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-17 14:01:22,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:01:22,861 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-17 14:01:22,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:01:23,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:01:23,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752144792] [2021-12-17 14:01:23,093 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:01:23,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261585648] [2021-12-17 14:01:23,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261585648] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:01:23,093 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:01:23,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-12-17 14:01:23,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132728909] [2021-12-17 14:01:23,093 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 14:01:23,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 14:01:23,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:01:23,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 14:01:23,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-12-17 14:01:23,094 INFO L87 Difference]: Start difference. First operand 97 states and 109 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 14:01:23,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:01:23,171 INFO L93 Difference]: Finished difference Result 102 states and 113 transitions. [2021-12-17 14:01:23,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 14:01:23,171 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 53 [2021-12-17 14:01:23,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:01:23,172 INFO L225 Difference]: With dead ends: 102 [2021-12-17 14:01:23,172 INFO L226 Difference]: Without dead ends: 96 [2021-12-17 14:01:23,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-12-17 14:01:23,173 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 2 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:01:23,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 246 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:01:23,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-17 14:01:23,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-12-17 14:01:23,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 73 states have internal predecessors, (75), 16 states have call successors, (16), 11 states have call predecessors, (16), 10 states have return successors, (15), 11 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-17 14:01:23,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2021-12-17 14:01:23,187 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 53 [2021-12-17 14:01:23,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:01:23,188 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2021-12-17 14:01:23,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 14:01:23,188 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2021-12-17 14:01:23,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-17 14:01:23,190 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:01:23,190 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:01:23,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 14:01:23,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-17 14:01:23,407 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:01:23,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:01:23,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1021371784, now seen corresponding path program 5 times [2021-12-17 14:01:23,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:01:23,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030443212] [2021-12-17 14:01:23,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:01:23,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:01:23,413 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:01:23,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1113716586] [2021-12-17 14:01:23,413 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 14:01:23,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:01:23,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:01:23,427 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) [2021-12-17 14:01:23,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 14:01:25,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-17 14:01:25,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 14:01:25,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-17 14:01:25,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:01:25,848 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 14 proven. 60 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-17 14:01:25,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:01:25,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:01:25,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030443212] [2021-12-17 14:01:25,969 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:01:25,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113716586] [2021-12-17 14:01:25,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113716586] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:01:25,969 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:01:25,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-12-17 14:01:25,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848262564] [2021-12-17 14:01:25,969 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 14:01:25,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 14:01:25,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:01:25,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 14:01:25,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-12-17 14:01:25,970 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-17 14:01:26,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:01:26,066 INFO L93 Difference]: Finished difference Result 101 states and 110 transitions. [2021-12-17 14:01:26,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 14:01:26,067 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 61 [2021-12-17 14:01:26,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:01:26,067 INFO L225 Difference]: With dead ends: 101 [2021-12-17 14:01:26,067 INFO L226 Difference]: Without dead ends: 95 [2021-12-17 14:01:26,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-12-17 14:01:26,068 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 2 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:01:26,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 303 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:01:26,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-17 14:01:26,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-12-17 14:01:26,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 72 states have internal predecessors, (74), 15 states have call successors, (15), 11 states have call predecessors, (15), 10 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-17 14:01:26,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 103 transitions. [2021-12-17 14:01:26,075 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 103 transitions. Word has length 61 [2021-12-17 14:01:26,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:01:26,075 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 103 transitions. [2021-12-17 14:01:26,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-17 14:01:26,076 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 103 transitions. [2021-12-17 14:01:26,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-17 14:01:26,076 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:01:26,076 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:01:26,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-17 14:01:26,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:01:26,284 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:01:26,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:01:26,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1106405730, now seen corresponding path program 6 times [2021-12-17 14:01:26,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:01:26,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048862474] [2021-12-17 14:01:26,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:01:26,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:01:26,293 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:01:26,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [989807360] [2021-12-17 14:01:26,296 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 14:01:26,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:01:26,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:01:26,298 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) [2021-12-17 14:01:26,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-17 14:01:33,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-17 14:01:33,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 14:01:33,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-17 14:01:33,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:01:34,045 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 16 proven. 84 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-17 14:01:34,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:01:34,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:01:34,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048862474] [2021-12-17 14:01:34,201 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:01:34,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989807360] [2021-12-17 14:01:34,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989807360] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:01:34,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:01:34,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-12-17 14:01:34,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54274671] [2021-12-17 14:01:34,202 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 14:01:34,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 14:01:34,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:01:34,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 14:01:34,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-12-17 14:01:34,202 INFO L87 Difference]: Start difference. First operand 95 states and 103 transitions. Second operand has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-17 14:01:34,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:01:34,330 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2021-12-17 14:01:34,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 14:01:34,331 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 69 [2021-12-17 14:01:34,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:01:34,331 INFO L225 Difference]: With dead ends: 100 [2021-12-17 14:01:34,331 INFO L226 Difference]: Without dead ends: 94 [2021-12-17 14:01:34,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-12-17 14:01:34,332 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 2 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:01:34,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 366 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:01:34,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-17 14:01:34,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-12-17 14:01:34,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 71 states have internal predecessors, (73), 14 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (13), 11 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-17 14:01:34,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2021-12-17 14:01:34,339 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 69 [2021-12-17 14:01:34,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:01:34,339 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2021-12-17 14:01:34,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-17 14:01:34,339 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2021-12-17 14:01:34,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-17 14:01:34,340 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:01:34,340 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:01:34,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-17 14:01:34,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-17 14:01:34,549 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:01:34,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:01:34,550 INFO L85 PathProgramCache]: Analyzing trace with hash -317230276, now seen corresponding path program 7 times [2021-12-17 14:01:34,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:01:34,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952605136] [2021-12-17 14:01:34,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:01:34,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:01:34,556 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:01:34,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [175820127] [2021-12-17 14:01:34,556 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 14:01:34,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:01:34,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:01:34,557 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:01:34,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-17 14:01:38,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:01:38,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-17 14:01:38,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:01:38,463 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 18 proven. 112 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-12-17 14:01:38,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:01:38,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:01:38,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952605136] [2021-12-17 14:01:38,587 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:01:38,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175820127] [2021-12-17 14:01:38,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175820127] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:01:38,588 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:01:38,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-12-17 14:01:38,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876523653] [2021-12-17 14:01:38,588 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 14:01:38,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 14:01:38,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:01:38,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 14:01:38,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-12-17 14:01:38,589 INFO L87 Difference]: Start difference. First operand 94 states and 100 transitions. Second operand has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 14:01:38,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:01:38,732 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2021-12-17 14:01:38,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 14:01:38,733 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 77 [2021-12-17 14:01:38,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:01:38,734 INFO L225 Difference]: With dead ends: 99 [2021-12-17 14:01:38,734 INFO L226 Difference]: Without dead ends: 93 [2021-12-17 14:01:38,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-12-17 14:01:38,735 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 2 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:01:38,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 435 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:01:38,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-17 14:01:38,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-12-17 14:01:38,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 70 states have internal predecessors, (72), 13 states have call successors, (13), 11 states have call predecessors, (13), 10 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-17 14:01:38,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2021-12-17 14:01:38,743 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 77 [2021-12-17 14:01:38,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:01:38,743 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2021-12-17 14:01:38,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 14:01:38,744 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2021-12-17 14:01:38,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-17 14:01:38,744 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:01:38,744 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:01:38,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-17 14:01:38,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-17 14:01:38,953 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:01:38,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:01:38,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1298793238, now seen corresponding path program 8 times [2021-12-17 14:01:38,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:01:38,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172168061] [2021-12-17 14:01:38,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:01:38,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:01:38,971 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:01:38,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [177040274] [2021-12-17 14:01:38,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 14:01:38,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:01:38,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:01:38,972 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:01:38,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-17 14:01:42,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 14:01:42,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 14:01:42,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-17 14:01:42,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:01:42,364 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 20 proven. 144 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-17 14:01:42,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:01:42,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:01:42,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172168061] [2021-12-17 14:01:42,603 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:01:42,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177040274] [2021-12-17 14:01:42,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177040274] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:01:42,603 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:01:42,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-12-17 14:01:42,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605328258] [2021-12-17 14:01:42,603 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 14:01:42,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 14:01:42,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:01:42,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 14:01:42,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-12-17 14:01:42,604 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-17 14:01:42,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:01:42,802 INFO L93 Difference]: Finished difference Result 98 states and 101 transitions. [2021-12-17 14:01:42,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 14:01:42,803 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 85 [2021-12-17 14:01:42,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:01:42,804 INFO L225 Difference]: With dead ends: 98 [2021-12-17 14:01:42,804 INFO L226 Difference]: Without dead ends: 92 [2021-12-17 14:01:42,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-12-17 14:01:42,807 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 2 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 14:01:42,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 510 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 14:01:42,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-17 14:01:42,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-12-17 14:01:42,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 12 states have call successors, (12), 11 states have call predecessors, (12), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-17 14:01:42,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2021-12-17 14:01:42,811 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 85 [2021-12-17 14:01:42,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:01:42,811 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2021-12-17 14:01:42,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-17 14:01:42,812 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2021-12-17 14:01:42,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-17 14:01:42,812 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:01:42,812 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:01:42,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-17 14:01:43,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-17 14:01:43,013 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:01:43,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:01:43,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1207691024, now seen corresponding path program 9 times [2021-12-17 14:01:43,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:01:43,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37063218] [2021-12-17 14:01:43,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:01:43,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:01:43,018 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:01:43,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1404856617] [2021-12-17 14:01:43,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 14:01:43,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:01:43,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:01:43,020 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:01:43,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process Killed by 15