./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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/egcd3-ll_unwindbound5.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 6d288c71d1b2e69759b6f9526e6975c86927bb09c8445c07388947e8f3491289 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 03:26:43,296 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 03:26:43,298 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 03:26:43,323 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 03:26:43,324 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 03:26:43,325 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 03:26:43,326 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 03:26:43,327 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 03:26:43,328 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 03:26:43,330 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 03:26:43,331 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 03:26:43,335 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 03:26:43,336 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 03:26:43,338 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 03:26:43,339 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 03:26:43,341 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 03:26:43,342 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 03:26:43,345 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 03:26:43,347 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 03:26:43,350 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 03:26:43,353 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 03:26:43,354 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 03:26:43,355 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 03:26:43,357 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 03:26:43,357 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 03:26:43,360 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 03:26:43,363 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 03:26:43,364 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 03:26:43,365 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 03:26:43,365 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 03:26:43,366 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 03:26:43,366 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 03:26:43,367 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 03:26:43,368 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 03:26:43,369 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 03:26:43,370 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 03:26:43,370 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 03:26:43,371 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 03:26:43,371 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 03:26:43,371 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 03:26:43,372 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 03:26:43,373 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 03:26:43,378 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 03:26:43,418 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 03:26:43,419 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 03:26:43,419 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 03:26:43,420 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 03:26:43,420 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 03:26:43,420 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 03:26:43,421 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 03:26:43,421 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 03:26:43,421 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 03:26:43,422 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 03:26:43,422 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 03:26:43,423 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 03:26:43,423 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 03:26:43,423 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 03:26:43,423 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 03:26:43,424 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 03:26:43,424 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 03:26:43,424 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 03:26:43,424 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 03:26:43,424 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 03:26:43,424 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 03:26:43,425 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 03:26:43,425 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 03:26:43,425 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 03:26:43,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 03:26:43,426 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 03:26:43,426 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 03:26:43,426 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 03:26:43,426 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 03:26:43,426 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 03:26:43,427 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 03:26:43,427 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 03:26:43,427 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 03:26:43,427 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6d288c71d1b2e69759b6f9526e6975c86927bb09c8445c07388947e8f3491289 [2022-07-21 03:26:43,692 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 03:26:43,708 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 03:26:43,710 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 03:26:43,711 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 03:26:43,711 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 03:26:43,712 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound5.c [2022-07-21 03:26:43,772 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c359a0af/91bfa65fa31844f49768ce5a783c7f5b/FLAG2130c6024 [2022-07-21 03:26:44,156 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 03:26:44,157 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound5.c [2022-07-21 03:26:44,162 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c359a0af/91bfa65fa31844f49768ce5a783c7f5b/FLAG2130c6024 [2022-07-21 03:26:44,571 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c359a0af/91bfa65fa31844f49768ce5a783c7f5b [2022-07-21 03:26:44,572 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 03:26:44,574 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 03:26:44,578 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 03:26:44,578 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 03:26:44,581 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 03:26:44,581 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:26:44" (1/1) ... [2022-07-21 03:26:44,582 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a64e193 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:26:44, skipping insertion in model container [2022-07-21 03:26:44,582 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:26:44" (1/1) ... [2022-07-21 03:26:44,588 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 03:26:44,604 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 03:26:44,713 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/egcd3-ll_unwindbound5.c[490,503] [2022-07-21 03:26:44,730 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 03:26:44,741 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 03:26:44,751 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/egcd3-ll_unwindbound5.c[490,503] [2022-07-21 03:26:44,759 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 03:26:44,769 INFO L208 MainTranslator]: Completed translation [2022-07-21 03:26:44,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:26:44 WrapperNode [2022-07-21 03:26:44,770 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 03:26:44,771 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 03:26:44,771 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 03:26:44,771 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 03:26:44,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:26:44" (1/1) ... [2022-07-21 03:26:44,822 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:26:44" (1/1) ... [2022-07-21 03:26:44,844 INFO L137 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 91 [2022-07-21 03:26:44,845 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 03:26:44,846 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 03:26:44,846 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 03:26:44,846 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 03:26:44,852 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:26:44" (1/1) ... [2022-07-21 03:26:44,852 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:26:44" (1/1) ... [2022-07-21 03:26:44,861 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:26:44" (1/1) ... [2022-07-21 03:26:44,862 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:26:44" (1/1) ... [2022-07-21 03:26:44,870 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:26:44" (1/1) ... [2022-07-21 03:26:44,878 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:26:44" (1/1) ... [2022-07-21 03:26:44,879 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:26:44" (1/1) ... [2022-07-21 03:26:44,881 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 03:26:44,884 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 03:26:44,885 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 03:26:44,885 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 03:26:44,885 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:26:44" (1/1) ... [2022-07-21 03:26:44,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 03:26:44,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:26:44,912 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) [2022-07-21 03:26:44,936 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 [2022-07-21 03:26:44,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 03:26:44,951 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-21 03:26:44,951 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-21 03:26:44,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 03:26:44,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 03:26:44,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 03:26:44,952 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-21 03:26:44,952 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-21 03:26:45,013 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 03:26:45,015 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 03:26:45,209 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 03:26:45,215 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 03:26:45,215 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-21 03:26:45,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:26:45 BoogieIcfgContainer [2022-07-21 03:26:45,217 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 03:26:45,219 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 03:26:45,235 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 03:26:45,238 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 03:26:45,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 03:26:44" (1/3) ... [2022-07-21 03:26:45,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f2596ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:26:45, skipping insertion in model container [2022-07-21 03:26:45,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:26:44" (2/3) ... [2022-07-21 03:26:45,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f2596ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:26:45, skipping insertion in model container [2022-07-21 03:26:45,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:26:45" (3/3) ... [2022-07-21 03:26:45,241 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound5.c [2022-07-21 03:26:45,253 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 03:26:45,254 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 03:26:45,311 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 03:26:45,329 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@78da7625, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3a7cd3db [2022-07-21 03:26:45,330 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 03:26:45,335 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-21 03:26:45,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-21 03:26:45,341 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:26:45,342 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:26:45,343 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:26:45,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:26:45,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1663185933, now seen corresponding path program 1 times [2022-07-21 03:26:45,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:26:45,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098251597] [2022-07-21 03:26:45,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:26:45,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:26:45,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:26:45,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 03:26:45,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:26:45,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 03:26:45,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:26:45,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 03:26:45,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:26:45,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098251597] [2022-07-21 03:26:45,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098251597] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:26:45,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:26:45,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 03:26:45,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632380424] [2022-07-21 03:26:45,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:26:45,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 03:26:45,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:26:45,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 03:26:45,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 03:26:45,564 INFO L87 Difference]: Start difference. First operand has 35 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 03:26:45,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:26:45,586 INFO L93 Difference]: Finished difference Result 67 states and 103 transitions. [2022-07-21 03:26:45,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 03:26:45,588 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-07-21 03:26:45,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:26:45,595 INFO L225 Difference]: With dead ends: 67 [2022-07-21 03:26:45,595 INFO L226 Difference]: Without dead ends: 31 [2022-07-21 03:26:45,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 03:26:45,601 INFO L413 NwaCegarLoop]: 45 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, 45 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 [2022-07-21 03:26:45,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 03:26:45,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-21 03:26:45,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-07-21 03:26:45,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-21 03:26:45,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2022-07-21 03:26:45,636 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 18 [2022-07-21 03:26:45,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:26:45,637 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2022-07-21 03:26:45,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 03:26:45,637 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2022-07-21 03:26:45,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-21 03:26:45,639 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:26:45,639 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:26:45,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 03:26:45,639 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:26:45,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:26:45,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1013747788, now seen corresponding path program 1 times [2022-07-21 03:26:45,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:26:45,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619425086] [2022-07-21 03:26:45,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:26:45,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:26:45,657 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:26:45,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2074884558] [2022-07-21 03:26:45,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:26:45,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:26:45,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:26:45,660 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) [2022-07-21 03:26:45,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 03:26:45,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:26:45,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 03:26:45,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:26:45,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 03:26:45,786 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 03:26:45,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:26:45,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619425086] [2022-07-21 03:26:45,787 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:26:45,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074884558] [2022-07-21 03:26:45,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074884558] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:26:45,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:26:45,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 03:26:45,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291518171] [2022-07-21 03:26:45,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:26:45,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 03:26:45,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:26:45,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 03:26:45,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 03:26:45,794 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 03:26:45,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:26:45,814 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2022-07-21 03:26:45,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 03:26:45,817 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-07-21 03:26:45,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:26:45,818 INFO L225 Difference]: With dead ends: 40 [2022-07-21 03:26:45,819 INFO L226 Difference]: Without dead ends: 33 [2022-07-21 03:26:45,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 03:26:45,820 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 03:26:45,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 103 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 03:26:45,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-21 03:26:45,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-07-21 03:26:45,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-21 03:26:45,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-07-21 03:26:45,827 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2022-07-21 03:26:45,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:26:45,828 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-07-21 03:26:45,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 03:26:45,829 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-07-21 03:26:45,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-21 03:26:45,830 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:26:45,831 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:26:45,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-21 03:26:46,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:26:46,052 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:26:46,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:26:46,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1341775226, now seen corresponding path program 1 times [2022-07-21 03:26:46,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:26:46,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689283060] [2022-07-21 03:26:46,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:26:46,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:26:46,065 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:26:46,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [196399204] [2022-07-21 03:26:46,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:26:46,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:26:46,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:26:46,068 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) [2022-07-21 03:26:46,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 03:26:46,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:26:46,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 03:26:46,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:26:46,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 03:26:46,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 03:26:46,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:26:46,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689283060] [2022-07-21 03:26:46,150 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:26:46,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196399204] [2022-07-21 03:26:46,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196399204] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:26:46,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:26:46,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 03:26:46,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543818043] [2022-07-21 03:26:46,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:26:46,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 03:26:46,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:26:46,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 03:26:46,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 03:26:46,153 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 03:26:46,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:26:46,224 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2022-07-21 03:26:46,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 03:26:46,225 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-07-21 03:26:46,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:26:46,226 INFO L225 Difference]: With dead ends: 53 [2022-07-21 03:26:46,226 INFO L226 Difference]: Without dead ends: 46 [2022-07-21 03:26:46,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-21 03:26:46,227 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 46 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 03:26:46,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 128 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 03:26:46,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-21 03:26:46,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2022-07-21 03:26:46,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-21 03:26:46,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2022-07-21 03:26:46,236 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 20 [2022-07-21 03:26:46,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:26:46,237 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2022-07-21 03:26:46,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 03:26:46,237 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2022-07-21 03:26:46,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-21 03:26:46,238 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:26:46,238 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:26:46,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 03:26:46,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-21 03:26:46,455 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:26:46,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:26:46,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1315139464, now seen corresponding path program 1 times [2022-07-21 03:26:46,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:26:46,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038559299] [2022-07-21 03:26:46,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:26:46,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:26:46,469 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:26:46,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1659553844] [2022-07-21 03:26:46,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:26:46,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:26:46,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:26:46,471 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) [2022-07-21 03:26:46,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 03:26:46,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:26:46,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 03:26:46,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:26:46,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 03:26:46,606 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 03:26:46,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:26:46,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038559299] [2022-07-21 03:26:46,606 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:26:46,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659553844] [2022-07-21 03:26:46,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659553844] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:26:46,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:26:46,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 03:26:46,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528154162] [2022-07-21 03:26:46,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:26:46,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 03:26:46,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:26:46,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 03:26:46,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 03:26:46,610 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 03:26:46,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:26:46,640 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2022-07-21 03:26:46,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 03:26:46,641 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2022-07-21 03:26:46,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:26:46,643 INFO L225 Difference]: With dead ends: 58 [2022-07-21 03:26:46,643 INFO L226 Difference]: Without dead ends: 36 [2022-07-21 03:26:46,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 03:26:46,647 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 03:26:46,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 103 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 03:26:46,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-21 03:26:46,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-07-21 03:26:46,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-21 03:26:46,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2022-07-21 03:26:46,663 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 25 [2022-07-21 03:26:46,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:26:46,664 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2022-07-21 03:26:46,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 03:26:46,664 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2022-07-21 03:26:46,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-21 03:26:46,665 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:26:46,665 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:26:46,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 03:26:46,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:26:46,892 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:26:46,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:26:46,892 INFO L85 PathProgramCache]: Analyzing trace with hash 570907173, now seen corresponding path program 1 times [2022-07-21 03:26:46,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:26:46,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098427213] [2022-07-21 03:26:46,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:26:46,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:26:46,906 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:26:46,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [3763997] [2022-07-21 03:26:46,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:26:46,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:26:46,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:26:46,908 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) [2022-07-21 03:26:46,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 03:26:46,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:26:46,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 03:26:46,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:26:47,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 03:26:47,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 03:26:47,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:26:47,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098427213] [2022-07-21 03:26:47,225 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:26:47,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3763997] [2022-07-21 03:26:47,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3763997] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:26:47,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:26:47,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 03:26:47,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380851338] [2022-07-21 03:26:47,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:26:47,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 03:26:47,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:26:47,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 03:26:47,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-21 03:26:47,230 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 03:26:47,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:26:47,343 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2022-07-21 03:26:47,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 03:26:47,344 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2022-07-21 03:26:47,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:26:47,345 INFO L225 Difference]: With dead ends: 54 [2022-07-21 03:26:47,346 INFO L226 Difference]: Without dead ends: 52 [2022-07-21 03:26:47,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-07-21 03:26:47,348 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 65 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 03:26:47,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 183 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 03:26:47,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-21 03:26:47,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-07-21 03:26:47,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 37 states have internal predecessors, (47), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-21 03:26:47,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2022-07-21 03:26:47,367 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 25 [2022-07-21 03:26:47,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:26:47,368 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2022-07-21 03:26:47,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 03:26:47,370 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2022-07-21 03:26:47,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-21 03:26:47,371 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:26:47,372 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:26:47,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 03:26:47,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:26:47,580 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:26:47,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:26:47,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1698298847, now seen corresponding path program 1 times [2022-07-21 03:26:47,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:26:47,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272466164] [2022-07-21 03:26:47,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:26:47,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:26:47,593 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:26:47,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [581336874] [2022-07-21 03:26:47,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:26:47,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:26:47,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:26:47,603 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) [2022-07-21 03:26:47,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 03:26:47,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:26:47,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 03:26:47,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:26:47,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 03:26:47,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:26:47,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 03:26:47,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:26:47,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272466164] [2022-07-21 03:26:47,760 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:26:47,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581336874] [2022-07-21 03:26:47,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581336874] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:26:47,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:26:47,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2022-07-21 03:26:47,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14021039] [2022-07-21 03:26:47,761 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:26:47,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 03:26:47,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:26:47,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 03:26:47,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-21 03:26:47,762 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 03:26:47,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:26:47,846 INFO L93 Difference]: Finished difference Result 112 states and 144 transitions. [2022-07-21 03:26:47,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 03:26:47,850 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2022-07-21 03:26:47,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:26:47,856 INFO L225 Difference]: With dead ends: 112 [2022-07-21 03:26:47,856 INFO L226 Difference]: Without dead ends: 105 [2022-07-21 03:26:47,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-07-21 03:26:47,861 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 52 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 03:26:47,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 187 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 03:26:47,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-21 03:26:47,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 96. [2022-07-21 03:26:47,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 68 states have (on average 1.3235294117647058) internal successors, (90), 71 states have internal predecessors, (90), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-21 03:26:47,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 128 transitions. [2022-07-21 03:26:47,880 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 128 transitions. Word has length 26 [2022-07-21 03:26:47,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:26:47,880 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 128 transitions. [2022-07-21 03:26:47,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 03:26:47,881 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 128 transitions. [2022-07-21 03:26:47,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-21 03:26:47,881 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:26:47,881 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:26:47,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 03:26:48,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:26:48,099 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:26:48,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:26:48,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1127291835, now seen corresponding path program 1 times [2022-07-21 03:26:48,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:26:48,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008272346] [2022-07-21 03:26:48,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:26:48,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:26:48,121 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:26:48,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [161240416] [2022-07-21 03:26:48,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:26:48,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:26:48,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:26:48,128 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) [2022-07-21 03:26:48,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 03:26:48,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:26:48,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 03:26:48,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:26:48,229 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 03:26:48,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:26:48,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 03:26:48,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:26:48,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008272346] [2022-07-21 03:26:48,304 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:26:48,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161240416] [2022-07-21 03:26:48,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161240416] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:26:48,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:26:48,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-07-21 03:26:48,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407167497] [2022-07-21 03:26:48,306 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:26:48,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 03:26:48,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:26:48,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 03:26:48,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-21 03:26:48,307 INFO L87 Difference]: Start difference. First operand 96 states and 128 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 03:26:48,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:26:48,498 INFO L93 Difference]: Finished difference Result 182 states and 259 transitions. [2022-07-21 03:26:48,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 03:26:48,498 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2022-07-21 03:26:48,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:26:48,501 INFO L225 Difference]: With dead ends: 182 [2022-07-21 03:26:48,501 INFO L226 Difference]: Without dead ends: 170 [2022-07-21 03:26:48,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-07-21 03:26:48,502 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 117 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 03:26:48,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 227 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 03:26:48,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-07-21 03:26:48,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 127. [2022-07-21 03:26:48,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 96 states have (on average 1.34375) internal successors, (129), 98 states have internal predecessors, (129), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-07-21 03:26:48,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 174 transitions. [2022-07-21 03:26:48,523 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 174 transitions. Word has length 27 [2022-07-21 03:26:48,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:26:48,523 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 174 transitions. [2022-07-21 03:26:48,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 03:26:48,524 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 174 transitions. [2022-07-21 03:26:48,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-21 03:26:48,525 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:26:48,525 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:26:48,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 03:26:48,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:26:48,744 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:26:48,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:26:48,744 INFO L85 PathProgramCache]: Analyzing trace with hash -200071253, now seen corresponding path program 1 times [2022-07-21 03:26:48,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:26:48,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855461742] [2022-07-21 03:26:48,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:26:48,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:26:48,761 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:26:48,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1290435596] [2022-07-21 03:26:48,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:26:48,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:26:48,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:26:48,767 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) [2022-07-21 03:26:48,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 03:26:48,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:26:48,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-21 03:26:48,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:26:49,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 03:26:49,007 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 03:26:49,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:26:49,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855461742] [2022-07-21 03:26:49,008 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:26:49,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290435596] [2022-07-21 03:26:49,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290435596] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:26:49,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:26:49,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-21 03:26:49,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319318795] [2022-07-21 03:26:49,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:26:49,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 03:26:49,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:26:49,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 03:26:49,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-07-21 03:26:49,011 INFO L87 Difference]: Start difference. First operand 127 states and 174 transitions. Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 03:26:49,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:26:49,231 INFO L93 Difference]: Finished difference Result 152 states and 204 transitions. [2022-07-21 03:26:49,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 03:26:49,232 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-07-21 03:26:49,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:26:49,234 INFO L225 Difference]: With dead ends: 152 [2022-07-21 03:26:49,234 INFO L226 Difference]: Without dead ends: 150 [2022-07-21 03:26:49,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-07-21 03:26:49,235 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 76 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 03:26:49,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 220 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 03:26:49,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-07-21 03:26:49,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 139. [2022-07-21 03:26:49,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 105 states have (on average 1.3142857142857143) internal successors, (138), 107 states have internal predecessors, (138), 23 states have call successors, (23), 10 states have call predecessors, (23), 10 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-07-21 03:26:49,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 183 transitions. [2022-07-21 03:26:49,271 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 183 transitions. Word has length 30 [2022-07-21 03:26:49,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:26:49,271 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 183 transitions. [2022-07-21 03:26:49,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 03:26:49,272 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 183 transitions. [2022-07-21 03:26:49,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-21 03:26:49,273 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:26:49,273 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:26:49,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 03:26:49,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:26:49,495 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:26:49,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:26:49,496 INFO L85 PathProgramCache]: Analyzing trace with hash 164485690, now seen corresponding path program 1 times [2022-07-21 03:26:49,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:26:49,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272586170] [2022-07-21 03:26:49,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:26:49,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:26:49,505 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:26:49,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1251643033] [2022-07-21 03:26:49,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:26:49,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:26:49,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:26:49,512 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) [2022-07-21 03:26:49,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 03:26:49,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:26:49,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-21 03:26:49,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:26:49,729 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 03:26:49,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:26:49,825 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 03:26:49,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:26:49,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272586170] [2022-07-21 03:26:49,826 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:26:49,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251643033] [2022-07-21 03:26:49,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251643033] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:26:49,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:26:49,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 12 [2022-07-21 03:26:49,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51326747] [2022-07-21 03:26:49,827 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:26:49,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 03:26:49,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:26:49,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 03:26:49,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-07-21 03:26:49,828 INFO L87 Difference]: Start difference. First operand 139 states and 183 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 03:26:50,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:26:50,094 INFO L93 Difference]: Finished difference Result 182 states and 249 transitions. [2022-07-21 03:26:50,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 03:26:50,095 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-07-21 03:26:50,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:26:50,096 INFO L225 Difference]: With dead ends: 182 [2022-07-21 03:26:50,096 INFO L226 Difference]: Without dead ends: 180 [2022-07-21 03:26:50,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-07-21 03:26:50,097 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 88 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 03:26:50,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 324 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 03:26:50,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-07-21 03:26:50,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 169. [2022-07-21 03:26:50,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 126 states have (on average 1.3412698412698412) internal successors, (169), 128 states have internal predecessors, (169), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2022-07-21 03:26:50,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 230 transitions. [2022-07-21 03:26:50,115 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 230 transitions. Word has length 32 [2022-07-21 03:26:50,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:26:50,115 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 230 transitions. [2022-07-21 03:26:50,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 03:26:50,116 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 230 transitions. [2022-07-21 03:26:50,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-21 03:26:50,116 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:26:50,117 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:26:50,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 03:26:50,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-21 03:26:50,331 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:26:50,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:26:50,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1985711111, now seen corresponding path program 1 times [2022-07-21 03:26:50,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:26:50,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813568536] [2022-07-21 03:26:50,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:26:50,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:26:50,350 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:26:50,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [98930598] [2022-07-21 03:26:50,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:26:50,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:26:50,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:26:50,354 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) [2022-07-21 03:26:50,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 03:26:50,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:26:50,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 03:26:50,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:26:50,444 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 03:26:50,445 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 03:26:50,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:26:50,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813568536] [2022-07-21 03:26:50,445 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:26:50,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98930598] [2022-07-21 03:26:50,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98930598] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:26:50,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:26:50,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 03:26:50,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733993155] [2022-07-21 03:26:50,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:26:50,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 03:26:50,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:26:50,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 03:26:50,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-21 03:26:50,448 INFO L87 Difference]: Start difference. First operand 169 states and 230 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 03:26:50,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:26:50,478 INFO L93 Difference]: Finished difference Result 236 states and 323 transitions. [2022-07-21 03:26:50,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 03:26:50,478 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2022-07-21 03:26:50,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:26:50,481 INFO L225 Difference]: With dead ends: 236 [2022-07-21 03:26:50,482 INFO L226 Difference]: Without dead ends: 169 [2022-07-21 03:26:50,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-21 03:26:50,485 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 03:26:50,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 128 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 03:26:50,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-07-21 03:26:50,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2022-07-21 03:26:50,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 126 states have (on average 1.3333333333333333) internal successors, (168), 128 states have internal predecessors, (168), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2022-07-21 03:26:50,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 229 transitions. [2022-07-21 03:26:50,499 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 229 transitions. Word has length 32 [2022-07-21 03:26:50,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:26:50,500 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 229 transitions. [2022-07-21 03:26:50,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 03:26:50,500 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 229 transitions. [2022-07-21 03:26:50,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-21 03:26:50,501 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:26:50,501 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:26:50,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 03:26:50,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-21 03:26:50,724 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:26:50,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:26:50,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1730540965, now seen corresponding path program 1 times [2022-07-21 03:26:50,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:26:50,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840256377] [2022-07-21 03:26:50,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:26:50,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:26:50,733 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:26:50,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [480108892] [2022-07-21 03:26:50,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:26:50,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:26:50,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:26:50,742 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) [2022-07-21 03:26:50,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 03:26:50,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:26:50,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 03:26:50,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:26:50,831 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 03:26:50,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 03:26:50,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:26:50,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840256377] [2022-07-21 03:26:50,832 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:26:50,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480108892] [2022-07-21 03:26:50,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480108892] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:26:50,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:26:50,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 03:26:50,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570325237] [2022-07-21 03:26:50,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:26:50,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 03:26:50,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:26:50,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 03:26:50,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 03:26:50,834 INFO L87 Difference]: Start difference. First operand 169 states and 229 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 03:26:50,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:26:50,891 INFO L93 Difference]: Finished difference Result 234 states and 329 transitions. [2022-07-21 03:26:50,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 03:26:50,891 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2022-07-21 03:26:50,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:26:50,893 INFO L225 Difference]: With dead ends: 234 [2022-07-21 03:26:50,893 INFO L226 Difference]: Without dead ends: 232 [2022-07-21 03:26:50,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-21 03:26:50,894 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 10 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 03:26:50,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 134 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 03:26:50,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-07-21 03:26:50,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 225. [2022-07-21 03:26:50,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 159 states have (on average 1.3647798742138364) internal successors, (217), 161 states have internal predecessors, (217), 51 states have call successors, (51), 14 states have call predecessors, (51), 14 states have return successors, (50), 49 states have call predecessors, (50), 50 states have call successors, (50) [2022-07-21 03:26:50,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 318 transitions. [2022-07-21 03:26:50,916 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 318 transitions. Word has length 35 [2022-07-21 03:26:50,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:26:50,917 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 318 transitions. [2022-07-21 03:26:50,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 03:26:50,917 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 318 transitions. [2022-07-21 03:26:50,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-21 03:26:50,918 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:26:50,918 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:26:50,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 03:26:51,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-21 03:26:51,131 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:26:51,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:26:51,132 INFO L85 PathProgramCache]: Analyzing trace with hash -2009961290, now seen corresponding path program 1 times [2022-07-21 03:26:51,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:26:51,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331365297] [2022-07-21 03:26:51,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:26:51,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:26:51,141 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:26:51,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [773677617] [2022-07-21 03:26:51,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:26:51,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:26:51,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:26:51,143 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) [2022-07-21 03:26:51,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 03:26:51,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:26:51,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-21 03:26:51,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:26:51,325 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 03:26:51,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:26:51,406 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 03:26:51,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:26:51,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331365297] [2022-07-21 03:26:51,407 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:26:51,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773677617] [2022-07-21 03:26:51,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773677617] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:26:51,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:26:51,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-07-21 03:26:51,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555124866] [2022-07-21 03:26:51,408 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:26:51,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 03:26:51,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:26:51,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 03:26:51,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-21 03:26:51,410 INFO L87 Difference]: Start difference. First operand 225 states and 318 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-21 03:26:52,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:26:52,212 INFO L93 Difference]: Finished difference Result 387 states and 572 transitions. [2022-07-21 03:26:52,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 03:26:52,213 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2022-07-21 03:26:52,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:26:52,215 INFO L225 Difference]: With dead ends: 387 [2022-07-21 03:26:52,215 INFO L226 Difference]: Without dead ends: 385 [2022-07-21 03:26:52,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-07-21 03:26:52,216 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 173 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 03:26:52,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 276 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-21 03:26:52,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-07-21 03:26:52,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 372. [2022-07-21 03:26:52,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 264 states have (on average 1.4242424242424243) internal successors, (376), 266 states have internal predecessors, (376), 91 states have call successors, (91), 16 states have call predecessors, (91), 16 states have return successors, (90), 89 states have call predecessors, (90), 90 states have call successors, (90) [2022-07-21 03:26:52,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 557 transitions. [2022-07-21 03:26:52,261 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 557 transitions. Word has length 37 [2022-07-21 03:26:52,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:26:52,261 INFO L495 AbstractCegarLoop]: Abstraction has 372 states and 557 transitions. [2022-07-21 03:26:52,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-21 03:26:52,262 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 557 transitions. [2022-07-21 03:26:52,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-21 03:26:52,263 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:26:52,263 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:26:52,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 03:26:52,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-21 03:26:52,479 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:26:52,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:26:52,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1954288725, now seen corresponding path program 1 times [2022-07-21 03:26:52,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:26:52,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012140648] [2022-07-21 03:26:52,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:26:52,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:26:52,488 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:26:52,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1105398845] [2022-07-21 03:26:52,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:26:52,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:26:52,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:26:52,490 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) [2022-07-21 03:26:52,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 03:26:52,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:26:52,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 03:26:52,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:26:52,564 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-21 03:26:52,564 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 03:26:52,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:26:52,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012140648] [2022-07-21 03:26:52,565 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:26:52,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105398845] [2022-07-21 03:26:52,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105398845] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:26:52,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:26:52,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 03:26:52,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124883784] [2022-07-21 03:26:52,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:26:52,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 03:26:52,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:26:52,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 03:26:52,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 03:26:52,567 INFO L87 Difference]: Start difference. First operand 372 states and 557 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 03:26:52,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:26:52,656 INFO L93 Difference]: Finished difference Result 556 states and 874 transitions. [2022-07-21 03:26:52,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 03:26:52,657 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2022-07-21 03:26:52,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:26:52,660 INFO L225 Difference]: With dead ends: 556 [2022-07-21 03:26:52,660 INFO L226 Difference]: Without dead ends: 554 [2022-07-21 03:26:52,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-21 03:26:52,662 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 12 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 03:26:52,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 150 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 03:26:52,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2022-07-21 03:26:52,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 490. [2022-07-21 03:26:52,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 305 states have (on average 1.4262295081967213) internal successors, (435), 326 states have internal predecessors, (435), 167 states have call successors, (167), 17 states have call predecessors, (167), 17 states have return successors, (166), 146 states have call predecessors, (166), 166 states have call successors, (166) [2022-07-21 03:26:52,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 768 transitions. [2022-07-21 03:26:52,735 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 768 transitions. Word has length 40 [2022-07-21 03:26:52,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:26:52,735 INFO L495 AbstractCegarLoop]: Abstraction has 490 states and 768 transitions. [2022-07-21 03:26:52,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 03:26:52,736 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 768 transitions. [2022-07-21 03:26:52,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-21 03:26:52,736 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:26:52,736 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:26:52,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-21 03:26:52,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-21 03:26:52,951 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:26:52,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:26:52,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1977082887, now seen corresponding path program 1 times [2022-07-21 03:26:52,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:26:52,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470191464] [2022-07-21 03:26:52,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:26:52,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:26:52,959 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:26:52,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [562355807] [2022-07-21 03:26:52,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:26:52,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:26:52,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:26:52,961 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) [2022-07-21 03:26:52,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 03:26:53,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:26:53,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 03:26:53,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:26:53,053 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 03:26:53,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:26:53,105 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 03:26:53,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:26:53,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470191464] [2022-07-21 03:26:53,106 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:26:53,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562355807] [2022-07-21 03:26:53,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562355807] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:26:53,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:26:53,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2022-07-21 03:26:53,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583084476] [2022-07-21 03:26:53,106 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:26:53,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 03:26:53,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:26:53,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 03:26:53,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-21 03:26:53,107 INFO L87 Difference]: Start difference. First operand 490 states and 768 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 03:26:53,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:26:53,227 INFO L93 Difference]: Finished difference Result 855 states and 1362 transitions. [2022-07-21 03:26:53,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 03:26:53,228 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2022-07-21 03:26:53,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:26:53,231 INFO L225 Difference]: With dead ends: 855 [2022-07-21 03:26:53,231 INFO L226 Difference]: Without dead ends: 498 [2022-07-21 03:26:53,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-07-21 03:26:53,234 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 63 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 03:26:53,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 185 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 03:26:53,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-07-21 03:26:53,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 494. [2022-07-21 03:26:53,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 309 states have (on average 1.4174757281553398) internal successors, (438), 329 states have internal predecessors, (438), 167 states have call successors, (167), 17 states have call predecessors, (167), 17 states have return successors, (166), 147 states have call predecessors, (166), 166 states have call successors, (166) [2022-07-21 03:26:53,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 771 transitions. [2022-07-21 03:26:53,297 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 771 transitions. Word has length 38 [2022-07-21 03:26:53,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:26:53,298 INFO L495 AbstractCegarLoop]: Abstraction has 494 states and 771 transitions. [2022-07-21 03:26:53,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 03:26:53,298 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 771 transitions. [2022-07-21 03:26:53,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-21 03:26:53,299 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:26:53,299 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:26:53,319 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-07-21 03:26:53,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-21 03:26:53,511 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:26:53,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:26:53,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1731348364, now seen corresponding path program 1 times [2022-07-21 03:26:53,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:26:53,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441872785] [2022-07-21 03:26:53,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:26:53,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:26:53,518 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:26:53,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [511794296] [2022-07-21 03:26:53,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:26:53,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:26:53,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:26:53,520 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:26:53,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 03:26:53,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:26:53,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 03:26:53,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:26:53,624 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 03:26:53,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:26:53,664 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 03:26:53,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:26:53,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441872785] [2022-07-21 03:26:53,665 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:26:53,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511794296] [2022-07-21 03:26:53,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511794296] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:26:53,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:26:53,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2022-07-21 03:26:53,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798689496] [2022-07-21 03:26:53,666 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:26:53,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 03:26:53,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:26:53,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 03:26:53,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-07-21 03:26:53,667 INFO L87 Difference]: Start difference. First operand 494 states and 771 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-21 03:26:53,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:26:53,784 INFO L93 Difference]: Finished difference Result 855 states and 1359 transitions. [2022-07-21 03:26:53,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 03:26:53,785 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2022-07-21 03:26:53,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:26:53,787 INFO L225 Difference]: With dead ends: 855 [2022-07-21 03:26:53,788 INFO L226 Difference]: Without dead ends: 500 [2022-07-21 03:26:53,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-21 03:26:53,789 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 61 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 03:26:53,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 157 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 03:26:53,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2022-07-21 03:26:53,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 498. [2022-07-21 03:26:53,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 313 states have (on average 1.4057507987220448) internal successors, (440), 333 states have internal predecessors, (440), 167 states have call successors, (167), 17 states have call predecessors, (167), 17 states have return successors, (166), 147 states have call predecessors, (166), 166 states have call successors, (166) [2022-07-21 03:26:53,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 773 transitions. [2022-07-21 03:26:53,852 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 773 transitions. Word has length 38 [2022-07-21 03:26:53,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:26:53,853 INFO L495 AbstractCegarLoop]: Abstraction has 498 states and 773 transitions. [2022-07-21 03:26:53,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-21 03:26:53,853 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 773 transitions. [2022-07-21 03:26:53,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-21 03:26:53,854 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:26:53,854 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:26:53,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-21 03:26:54,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:26:54,076 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:26:54,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:26:54,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1564131624, now seen corresponding path program 2 times [2022-07-21 03:26:54,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:26:54,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021177261] [2022-07-21 03:26:54,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:26:54,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:26:54,084 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:26:54,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1361621914] [2022-07-21 03:26:54,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 03:26:54,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:26:54,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:26:54,086 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:26:54,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 03:26:54,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 03:26:54,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 03:26:54,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 03:26:54,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:26:54,160 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 03:26:54,161 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 03:26:54,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:26:54,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021177261] [2022-07-21 03:26:54,161 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:26:54,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361621914] [2022-07-21 03:26:54,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361621914] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:26:54,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:26:54,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 03:26:54,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717110160] [2022-07-21 03:26:54,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:26:54,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 03:26:54,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:26:54,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 03:26:54,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 03:26:54,163 INFO L87 Difference]: Start difference. First operand 498 states and 773 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 03:26:54,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:26:54,308 INFO L93 Difference]: Finished difference Result 1069 states and 1719 transitions. [2022-07-21 03:26:54,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 03:26:54,309 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2022-07-21 03:26:54,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:26:54,313 INFO L225 Difference]: With dead ends: 1069 [2022-07-21 03:26:54,313 INFO L226 Difference]: Without dead ends: 756 [2022-07-21 03:26:54,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-21 03:26:54,315 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 29 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 03:26:54,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 157 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 03:26:54,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2022-07-21 03:26:54,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 519. [2022-07-21 03:26:54,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 350 states have (on average 1.3971428571428572) internal successors, (489), 368 states have internal predecessors, (489), 151 states have call successors, (151), 17 states have call predecessors, (151), 17 states have return successors, (150), 133 states have call predecessors, (150), 150 states have call successors, (150) [2022-07-21 03:26:54,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 790 transitions. [2022-07-21 03:26:54,391 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 790 transitions. Word has length 39 [2022-07-21 03:26:54,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:26:54,392 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 790 transitions. [2022-07-21 03:26:54,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 03:26:54,392 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 790 transitions. [2022-07-21 03:26:54,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-21 03:26:54,393 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:26:54,393 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:26:54,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-21 03:26:54,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-21 03:26:54,614 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:26:54,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:26:54,615 INFO L85 PathProgramCache]: Analyzing trace with hash 753696694, now seen corresponding path program 1 times [2022-07-21 03:26:54,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:26:54,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638512293] [2022-07-21 03:26:54,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:26:54,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:26:54,623 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:26:54,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1330412783] [2022-07-21 03:26:54,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:26:54,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:26:54,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:26:54,625 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:26:54,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-21 03:26:54,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:26:54,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-21 03:26:54,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:26:55,125 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-21 03:26:55,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:26:55,619 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-21 03:26:55,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:26:55,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638512293] [2022-07-21 03:26:55,620 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:26:55,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330412783] [2022-07-21 03:26:55,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330412783] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:26:55,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:26:55,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2022-07-21 03:26:55,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131664360] [2022-07-21 03:26:55,621 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:26:55,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 03:26:55,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:26:55,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 03:26:55,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-07-21 03:26:55,622 INFO L87 Difference]: Start difference. First operand 519 states and 790 transitions. Second operand has 20 states, 18 states have (on average 2.888888888888889) internal successors, (52), 19 states have internal predecessors, (52), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-21 03:27:03,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:27:03,694 INFO L93 Difference]: Finished difference Result 833 states and 1283 transitions. [2022-07-21 03:27:03,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-21 03:27:03,695 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.888888888888889) internal successors, (52), 19 states have internal predecessors, (52), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 54 [2022-07-21 03:27:03,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:27:03,700 INFO L225 Difference]: With dead ends: 833 [2022-07-21 03:27:03,700 INFO L226 Difference]: Without dead ends: 829 [2022-07-21 03:27:03,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=320, Invalid=1486, Unknown=0, NotChecked=0, Total=1806 [2022-07-21 03:27:03,702 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 236 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 1339 mSolverCounterSat, 341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 1680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 1339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-07-21 03:27:03,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 583 Invalid, 1680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [341 Valid, 1339 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-07-21 03:27:03,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2022-07-21 03:27:03,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 678. [2022-07-21 03:27:03,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 474 states have (on average 1.3987341772151898) internal successors, (663), 492 states have internal predecessors, (663), 183 states have call successors, (183), 20 states have call predecessors, (183), 20 states have return successors, (182), 165 states have call predecessors, (182), 182 states have call successors, (182) [2022-07-21 03:27:03,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 1028 transitions. [2022-07-21 03:27:03,821 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 1028 transitions. Word has length 54 [2022-07-21 03:27:03,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:27:03,821 INFO L495 AbstractCegarLoop]: Abstraction has 678 states and 1028 transitions. [2022-07-21 03:27:03,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.888888888888889) internal successors, (52), 19 states have internal predecessors, (52), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-21 03:27:03,821 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 1028 transitions. [2022-07-21 03:27:03,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-21 03:27:03,822 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:27:03,822 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:27:03,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-21 03:27:04,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-21 03:27:04,046 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:27:04,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:27:04,047 INFO L85 PathProgramCache]: Analyzing trace with hash 334196468, now seen corresponding path program 1 times [2022-07-21 03:27:04,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:27:04,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233743232] [2022-07-21 03:27:04,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:27:04,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:27:04,054 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:27:04,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2114529674] [2022-07-21 03:27:04,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:27:04,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:27:04,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:27:04,056 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:27:04,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-21 03:27:04,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 03:27:04,107 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 03:27:04,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 03:27:04,185 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 03:27:04,195 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 03:27:04,196 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-21 03:27:04,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-21 03:27:04,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-21 03:27:04,401 INFO L356 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:27:04,404 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-21 03:27:04,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 03:27:04 BoogieIcfgContainer [2022-07-21 03:27:04,454 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-21 03:27:04,455 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-21 03:27:04,455 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-21 03:27:04,456 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-21 03:27:04,456 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:26:45" (3/4) ... [2022-07-21 03:27:04,457 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-21 03:27:04,508 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-21 03:27:04,508 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-21 03:27:04,509 INFO L158 Benchmark]: Toolchain (without parser) took 19934.99ms. Allocated memory was 56.6MB in the beginning and 125.8MB in the end (delta: 69.2MB). Free memory was 34.7MB in the beginning and 63.6MB in the end (delta: -29.0MB). Peak memory consumption was 40.1MB. Max. memory is 16.1GB. [2022-07-21 03:27:04,509 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 56.6MB. Free memory is still 38.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 03:27:04,509 INFO L158 Benchmark]: CACSL2BoogieTranslator took 192.45ms. Allocated memory is still 56.6MB. Free memory was 34.5MB in the beginning and 39.9MB in the end (delta: -5.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-21 03:27:04,509 INFO L158 Benchmark]: Boogie Procedure Inliner took 74.08ms. Allocated memory was 56.6MB in the beginning and 71.3MB in the end (delta: 14.7MB). Free memory was 39.9MB in the beginning and 55.0MB in the end (delta: -15.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-07-21 03:27:04,510 INFO L158 Benchmark]: Boogie Preprocessor took 37.02ms. Allocated memory is still 71.3MB. Free memory was 55.0MB in the beginning and 53.9MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 03:27:04,510 INFO L158 Benchmark]: RCFGBuilder took 333.20ms. Allocated memory is still 71.3MB. Free memory was 53.9MB in the beginning and 43.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-21 03:27:04,510 INFO L158 Benchmark]: TraceAbstraction took 19235.45ms. Allocated memory was 71.3MB in the beginning and 125.8MB in the end (delta: 54.5MB). Free memory was 42.7MB in the beginning and 67.8MB in the end (delta: -25.1MB). Peak memory consumption was 30.8MB. Max. memory is 16.1GB. [2022-07-21 03:27:04,511 INFO L158 Benchmark]: Witness Printer took 52.82ms. Allocated memory is still 125.8MB. Free memory was 67.8MB in the beginning and 63.6MB in the end (delta: 4.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 03:27:04,512 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 56.6MB. Free memory is still 38.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 192.45ms. Allocated memory is still 56.6MB. Free memory was 34.5MB in the beginning and 39.9MB in the end (delta: -5.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 74.08ms. Allocated memory was 56.6MB in the beginning and 71.3MB in the end (delta: 14.7MB). Free memory was 39.9MB in the beginning and 55.0MB in the end (delta: -15.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.02ms. Allocated memory is still 71.3MB. Free memory was 55.0MB in the beginning and 53.9MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 333.20ms. Allocated memory is still 71.3MB. Free memory was 53.9MB in the beginning and 43.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 19235.45ms. Allocated memory was 71.3MB in the beginning and 125.8MB in the end (delta: 54.5MB). Free memory was 42.7MB in the beginning and 67.8MB in the end (delta: -25.1MB). Peak memory consumption was 30.8MB. Max. memory is 16.1GB. * Witness Printer took 52.82ms. Allocated memory is still 125.8MB. Free memory was 67.8MB in the beginning and 63.6MB in the end (delta: 4.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L24] RET assume_abort_if_not(x >= 1) VAL [counter=0, x=3, y=4] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L25] RET assume_abort_if_not(y >= 1) VAL [counter=0, x=3, y=4] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [a=3, b=4, counter=0, p=1, q=0, r=0, s=1, x=3, y=4] [L34] EXPR counter++ VAL [a=3, b=4, counter=1, counter++=0, p=1, q=0, r=0, s=1, x=3, y=4] [L34] COND TRUE counter++<5 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [a=3, b=4, c=3, counter=1, k=0, p=1, q=0, r=0, s=1, x=3, y=4] [L41] EXPR counter++ VAL [a=3, b=4, c=3, counter=2, counter++=1, k=0, p=1, q=0, r=0, s=1, x=3, y=4] [L41] COND TRUE counter++<5 [L42] COND TRUE !(c >= b) VAL [a=3, b=4, c=3, counter=2, k=0, p=1, q=0, r=0, s=1, x=3, y=4] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [a=4, b=3, c=3, counter=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, y=4] [L34] EXPR counter++ VAL [a=4, b=3, c=3, counter=3, counter++=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, y=4] [L34] COND TRUE counter++<5 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [a=4, b=3, c=4, counter=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, y=4] [L41] EXPR counter++ VAL [a=4, b=3, c=4, counter=4, counter++=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, y=4] [L41] COND TRUE counter++<5 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [a=4, b=3, c=4, counter=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=4] [L48] EXPR counter++ VAL [a=4, b=3, c=4, counter=5, counter++=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=4] [L48] COND TRUE counter++<5 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=4, b=3, c=4, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=4] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=4, b=3, c=4, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=4] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [a=4, b=3, c=4, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=4] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L52] RET __VERIFIER_assert(v == b * d) VAL [a=4, b=3, c=4, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=4] [L54] COND TRUE !(c >= 2 * v) VAL [a=4, b=3, c=4, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=4] [L59] c = c - v [L60] k = k + d VAL [a=4, b=3, c=1, counter=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=4] [L41] EXPR counter++ VAL [a=4, b=3, c=1, counter=6, counter++=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=4] [L41] COND FALSE !(counter++<5) [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [a=3, b=1, c=1, counter=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=3, x=3, y=4] [L34] EXPR counter++ VAL [a=3, b=1, c=1, counter=7, counter++=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=3, x=3, y=4] [L34] COND FALSE !(counter++<5) [L73] CALL __VERIFIER_assert(p*x - q*x + r*y - s*y == a) VAL [\old(cond)=0, counter=7] [L11] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=7] [L13] reach_error() VAL [\old(cond)=0, cond=0, counter=7] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 19.1s, OverallIterations: 18, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 10.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1093 SdHoareTripleChecker+Valid, 6.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1042 mSDsluCounter, 3290 SdHoareTripleChecker+Invalid, 6.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2505 mSDsCounter, 670 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2824 IncrementalHoareTripleChecker+Invalid, 3494 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 670 mSolverCounterUnsat, 785 mSDtfsCounter, 2824 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 816 GetRequests, 646 SyntacticMatches, 8 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 4.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=678occurred in iteration=17, InterpolantAutomatonStates: 155, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 17 MinimizatonAttempts, 565 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 594 NumberOfCodeBlocks, 594 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 763 ConstructedInterpolants, 0 QuantifiedInterpolants, 3780 SizeOfPredicates, 48 NumberOfNonLiveVariables, 1929 ConjunctsInSsa, 212 ConjunctsInUnsatCore, 24 InterpolantComputations, 10 PerfectInterpolantSequences, 257/348 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-07-21 03:27:04,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE