./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench/hard-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47807b21-400a-4432-9dab-eb597f45a52b/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47807b21-400a-4432-9dab-eb597f45a52b/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47807b21-400a-4432-9dab-eb597f45a52b/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47807b21-400a-4432-9dab-eb597f45a52b/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench/hard-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47807b21-400a-4432-9dab-eb597f45a52b/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47807b21-400a-4432-9dab-eb597f45a52b/bin/uautomizer-DrprNOufMa --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 8c31bebbbf1ab8c6e57b91fec88eba145fb9c1b52fce25f48cae26620a3d8ba6 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 18:18:29,511 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 18:18:29,513 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 18:18:29,544 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 18:18:29,545 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 18:18:29,546 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 18:18:29,548 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 18:18:29,550 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 18:18:29,552 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 18:18:29,553 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 18:18:29,554 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 18:18:29,555 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 18:18:29,556 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 18:18:29,557 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 18:18:29,559 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 18:18:29,560 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 18:18:29,561 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 18:18:29,562 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 18:18:29,564 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 18:18:29,567 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 18:18:29,568 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 18:18:29,570 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 18:18:29,571 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 18:18:29,572 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 18:18:29,576 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 18:18:29,576 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 18:18:29,577 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 18:18:29,578 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 18:18:29,578 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 18:18:29,579 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 18:18:29,580 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 18:18:29,580 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 18:18:29,581 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 18:18:29,582 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 18:18:29,583 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 18:18:29,583 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 18:18:29,584 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 18:18:29,584 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 18:18:29,584 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 18:18:29,584 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 18:18:29,585 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 18:18:29,586 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47807b21-400a-4432-9dab-eb597f45a52b/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 18:18:29,608 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 18:18:29,608 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 18:18:29,609 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 18:18:29,609 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 18:18:29,610 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 18:18:29,610 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 18:18:29,610 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 18:18:29,611 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 18:18:29,611 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 18:18:29,611 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 18:18:29,611 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 18:18:29,611 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 18:18:29,611 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 18:18:29,612 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 18:18:29,612 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 18:18:29,612 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 18:18:29,612 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 18:18:29,612 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 18:18:29,613 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 18:18:29,613 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 18:18:29,613 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 18:18:29,613 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 18:18:29,613 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 18:18:29,613 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 18:18:29,614 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:18:29,614 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 18:18:29,614 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 18:18:29,614 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 18:18:29,614 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 18:18:29,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 18:18:29,615 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 18:18:29,615 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 18:18:29,615 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 18:18:29,615 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 18:18:29,615 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47807b21-400a-4432-9dab-eb597f45a52b/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47807b21-400a-4432-9dab-eb597f45a52b/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c31bebbbf1ab8c6e57b91fec88eba145fb9c1b52fce25f48cae26620a3d8ba6 [2021-12-06 18:18:29,792 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:18:29,808 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:18:29,810 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:18:29,810 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:18:29,811 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:18:29,812 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47807b21-400a-4432-9dab-eb597f45a52b/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/nla-digbench/hard-ll.c [2021-12-06 18:18:29,854 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47807b21-400a-4432-9dab-eb597f45a52b/bin/uautomizer-DrprNOufMa/data/d449e41c2/bd8381bffb8646dba453f38eab819c9a/FLAGabcad018a [2021-12-06 18:18:30,225 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 18:18:30,226 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47807b21-400a-4432-9dab-eb597f45a52b/sv-benchmarks/c/nla-digbench/hard-ll.c [2021-12-06 18:18:30,230 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47807b21-400a-4432-9dab-eb597f45a52b/bin/uautomizer-DrprNOufMa/data/d449e41c2/bd8381bffb8646dba453f38eab819c9a/FLAGabcad018a [2021-12-06 18:18:30,239 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47807b21-400a-4432-9dab-eb597f45a52b/bin/uautomizer-DrprNOufMa/data/d449e41c2/bd8381bffb8646dba453f38eab819c9a [2021-12-06 18:18:30,241 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 18:18:30,242 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 18:18:30,243 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 18:18:30,243 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 18:18:30,246 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 18:18:30,246 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:18:30" (1/1) ... [2021-12-06 18:18:30,247 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14baa4d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:18:30, skipping insertion in model container [2021-12-06 18:18:30,247 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:18:30" (1/1) ... [2021-12-06 18:18:30,252 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 18:18:30,262 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:18:30,368 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47807b21-400a-4432-9dab-eb597f45a52b/sv-benchmarks/c/nla-digbench/hard-ll.c[538,551] [2021-12-06 18:18:30,382 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:18:30,389 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 18:18:30,399 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47807b21-400a-4432-9dab-eb597f45a52b/sv-benchmarks/c/nla-digbench/hard-ll.c[538,551] [2021-12-06 18:18:30,404 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:18:30,414 INFO L208 MainTranslator]: Completed translation [2021-12-06 18:18:30,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:18:30 WrapperNode [2021-12-06 18:18:30,415 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 18:18:30,415 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 18:18:30,415 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 18:18:30,416 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 18:18:30,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:18:30" (1/1) ... [2021-12-06 18:18:30,426 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:18:30" (1/1) ... [2021-12-06 18:18:30,439 INFO L137 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 56 [2021-12-06 18:18:30,439 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 18:18:30,439 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 18:18:30,439 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 18:18:30,440 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 18:18:30,446 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:18:30" (1/1) ... [2021-12-06 18:18:30,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:18:30" (1/1) ... [2021-12-06 18:18:30,447 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:18:30" (1/1) ... [2021-12-06 18:18:30,447 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:18:30" (1/1) ... [2021-12-06 18:18:30,449 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:18:30" (1/1) ... [2021-12-06 18:18:30,452 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:18:30" (1/1) ... [2021-12-06 18:18:30,453 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:18:30" (1/1) ... [2021-12-06 18:18:30,454 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 18:18:30,455 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 18:18:30,455 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 18:18:30,455 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 18:18:30,456 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:18:30" (1/1) ... [2021-12-06 18:18:30,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:18:30,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47807b21-400a-4432-9dab-eb597f45a52b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:18:30,481 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47807b21-400a-4432-9dab-eb597f45a52b/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 18:18:30,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47807b21-400a-4432-9dab-eb597f45a52b/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 18:18:30,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 18:18:30,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 18:18:30,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 18:18:30,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 18:18:30,517 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 18:18:30,517 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 18:18:30,572 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 18:18:30,573 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 18:18:30,653 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 18:18:30,657 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 18:18:30,658 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 18:18:30,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:18:30 BoogieIcfgContainer [2021-12-06 18:18:30,659 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 18:18:30,660 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 18:18:30,660 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 18:18:30,663 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 18:18:30,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 06:18:30" (1/3) ... [2021-12-06 18:18:30,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c4169f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:18:30, skipping insertion in model container [2021-12-06 18:18:30,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:18:30" (2/3) ... [2021-12-06 18:18:30,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c4169f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:18:30, skipping insertion in model container [2021-12-06 18:18:30,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:18:30" (3/3) ... [2021-12-06 18:18:30,665 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll.c [2021-12-06 18:18:30,669 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 18:18:30,669 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 18:18:30,705 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 18:18:30,710 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 18:18:30,711 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 18:18:30,724 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-06 18:18:30,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 18:18:30,728 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:18:30,728 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:18:30,728 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:18:30,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:18:30,732 INFO L85 PathProgramCache]: Analyzing trace with hash -586848446, now seen corresponding path program 1 times [2021-12-06 18:18:30,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:18:30,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135001034] [2021-12-06 18:18:30,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:18:30,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:18:30,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:30,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:18:30,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:18:30,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135001034] [2021-12-06 18:18:30,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135001034] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:18:30,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:18:30,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 18:18:30,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272017473] [2021-12-06 18:18:30,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:18:30,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 18:18:30,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:18:30,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 18:18:30,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 18:18:30,903 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 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 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:18:30,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:18:30,919 INFO L93 Difference]: Finished difference Result 49 states and 83 transitions. [2021-12-06 18:18:30,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 18:18:30,921 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-06 18:18:30,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:18:30,927 INFO L225 Difference]: With dead ends: 49 [2021-12-06 18:18:30,927 INFO L226 Difference]: Without dead ends: 22 [2021-12-06 18:18:30,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 18:18:30,932 INFO L933 BasicCegarLoop]: 34 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, 34 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:18:30,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:18:30,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-06 18:18:30,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-12-06 18:18:30,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 18:18:30,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2021-12-06 18:18:30,961 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 9 [2021-12-06 18:18:30,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:18:30,962 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2021-12-06 18:18:30,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:18:30,962 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2021-12-06 18:18:30,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 18:18:30,963 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:18:30,963 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:18:30,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 18:18:30,963 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:18:30,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:18:30,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1188158916, now seen corresponding path program 1 times [2021-12-06 18:18:30,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:18:30,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522075003] [2021-12-06 18:18:30,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:18:30,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:18:30,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:31,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:18:31,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:18:31,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522075003] [2021-12-06 18:18:31,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522075003] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:18:31,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:18:31,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:18:31,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810389488] [2021-12-06 18:18:31,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:18:31,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:18:31,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:18:31,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:18:31,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:18:31,030 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:18:31,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:18:31,076 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2021-12-06 18:18:31,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:18:31,077 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-06 18:18:31,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:18:31,078 INFO L225 Difference]: With dead ends: 35 [2021-12-06 18:18:31,078 INFO L226 Difference]: Without dead ends: 33 [2021-12-06 18:18:31,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:18:31,080 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 12 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:18:31,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 98 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:18:31,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-06 18:18:31,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2021-12-06 18:18:31,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 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) [2021-12-06 18:18:31,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2021-12-06 18:18:31,088 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2021-12-06 18:18:31,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:18:31,089 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2021-12-06 18:18:31,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:18:31,089 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2021-12-06 18:18:31,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 18:18:31,089 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:18:31,090 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:18:31,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 18:18:31,090 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:18:31,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:18:31,091 INFO L85 PathProgramCache]: Analyzing trace with hash -697944935, now seen corresponding path program 1 times [2021-12-06 18:18:31,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:18:31,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853969847] [2021-12-06 18:18:31,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:18:31,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:18:31,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:31,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 18:18:31,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:31,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:18:31,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:18:31,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853969847] [2021-12-06 18:18:31,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853969847] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:18:31,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:18:31,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:18:31,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995722960] [2021-12-06 18:18:31,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:18:31,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:18:31,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:18:31,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:18:31,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:18:31,152 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 18:18:31,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:18:31,196 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2021-12-06 18:18:31,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:18:31,197 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-12-06 18:18:31,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:18:31,198 INFO L225 Difference]: With dead ends: 39 [2021-12-06 18:18:31,198 INFO L226 Difference]: Without dead ends: 37 [2021-12-06 18:18:31,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:18:31,206 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 10 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:18:31,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 94 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:18:31,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-06 18:18:31,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2021-12-06 18:18:31,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 18:18:31,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-12-06 18:18:31,216 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 14 [2021-12-06 18:18:31,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:18:31,216 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-12-06 18:18:31,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 18:18:31,216 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-12-06 18:18:31,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 18:18:31,217 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:18:31,217 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:18:31,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 18:18:31,218 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:18:31,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:18:31,218 INFO L85 PathProgramCache]: Analyzing trace with hash 262992548, now seen corresponding path program 1 times [2021-12-06 18:18:31,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:18:31,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451523432] [2021-12-06 18:18:31,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:18:31,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:18:31,240 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 18:18:31,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [235558761] [2021-12-06 18:18:31,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:18:31,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:18:31,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47807b21-400a-4432-9dab-eb597f45a52b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:18:31,242 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47807b21-400a-4432-9dab-eb597f45a52b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:18:31,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47807b21-400a-4432-9dab-eb597f45a52b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 18:18:31,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:31,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 18:18:31,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:18:31,450 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:18:31,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:18:31,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:18:31,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451523432] [2021-12-06 18:18:31,451 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 18:18:31,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235558761] [2021-12-06 18:18:31,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235558761] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:18:31,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:18:31,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 18:18:31,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217261552] [2021-12-06 18:18:31,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:18:31,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:18:31,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:18:31,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:18:31,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:18:31,453 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 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) [2021-12-06 18:18:31,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:18:31,565 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2021-12-06 18:18:31,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:18:31,566 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 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 [2021-12-06 18:18:31,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:18:31,567 INFO L225 Difference]: With dead ends: 58 [2021-12-06 18:18:31,567 INFO L226 Difference]: Without dead ends: 44 [2021-12-06 18:18:31,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:18:31,568 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 32 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:18:31,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 121 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:18:31,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-06 18:18:31,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-12-06 18:18:31,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-06 18:18:31,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2021-12-06 18:18:31,576 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 19 [2021-12-06 18:18:31,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:18:31,577 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2021-12-06 18:18:31,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 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) [2021-12-06 18:18:31,577 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2021-12-06 18:18:31,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-06 18:18:31,578 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:18:31,578 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:18:31,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47807b21-400a-4432-9dab-eb597f45a52b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 18:18:31,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47807b21-400a-4432-9dab-eb597f45a52b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:18:31,779 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:18:31,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:18:31,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1807142342, now seen corresponding path program 1 times [2021-12-06 18:18:31,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:18:31,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618760739] [2021-12-06 18:18:31,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:18:31,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:18:31,788 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 18:18:31,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [956541307] [2021-12-06 18:18:31,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:18:31,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:18:31,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47807b21-400a-4432-9dab-eb597f45a52b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:18:31,789 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47807b21-400a-4432-9dab-eb597f45a52b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:18:31,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47807b21-400a-4432-9dab-eb597f45a52b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 18:18:31,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:31,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 18:18:31,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:18:31,890 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 18:18:31,890 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:18:31,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:18:31,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618760739] [2021-12-06 18:18:31,890 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 18:18:31,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956541307] [2021-12-06 18:18:31,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956541307] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:18:31,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:18:31,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:18:31,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579537918] [2021-12-06 18:18:31,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:18:31,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:18:31,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:18:31,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:18:31,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:18:31,892 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 18:18:31,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:18:31,929 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2021-12-06 18:18:31,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:18:31,930 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2021-12-06 18:18:31,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:18:31,931 INFO L225 Difference]: With dead ends: 57 [2021-12-06 18:18:31,931 INFO L226 Difference]: Without dead ends: 50 [2021-12-06 18:18:31,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:18:31,932 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 9 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:18:31,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 80 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:18:31,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-06 18:18:31,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-12-06 18:18:31,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-06 18:18:31,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2021-12-06 18:18:31,941 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 26 [2021-12-06 18:18:31,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:18:31,941 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2021-12-06 18:18:31,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 18:18:31,941 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2021-12-06 18:18:31,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-06 18:18:31,942 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:18:31,942 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:18:31,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47807b21-400a-4432-9dab-eb597f45a52b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 18:18:32,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47807b21-400a-4432-9dab-eb597f45a52b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:18:32,144 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:18:32,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:18:32,146 INFO L85 PathProgramCache]: Analyzing trace with hash -979933353, now seen corresponding path program 1 times [2021-12-06 18:18:32,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:18:32,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642790040] [2021-12-06 18:18:32,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:18:32,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:18:32,176 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 18:18:32,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1318655544] [2021-12-06 18:18:32,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:18:32,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:18:32,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47807b21-400a-4432-9dab-eb597f45a52b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:18:32,179 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47807b21-400a-4432-9dab-eb597f45a52b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:18:32,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47807b21-400a-4432-9dab-eb597f45a52b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 18:18:32,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:32,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 18:18:32,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:18:32,403 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 18:18:32,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:18:32,518 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 18:18:32,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:18:32,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642790040] [2021-12-06 18:18:32,518 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 18:18:32,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318655544] [2021-12-06 18:18:32,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318655544] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:18:32,519 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:18:32,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 12 [2021-12-06 18:18:32,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125060218] [2021-12-06 18:18:32,519 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:18:32,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 18:18:32,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:18:32,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 18:18:32,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-06 18:18:32,521 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 4 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) [2021-12-06 18:18:32,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:18:32,759 INFO L93 Difference]: Finished difference Result 97 states and 133 transitions. [2021-12-06 18:18:32,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 18:18:32,760 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 4 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 36 [2021-12-06 18:18:32,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:18:32,762 INFO L225 Difference]: With dead ends: 97 [2021-12-06 18:18:32,762 INFO L226 Difference]: Without dead ends: 68 [2021-12-06 18:18:32,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-12-06 18:18:32,763 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 45 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:18:32,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 136 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:18:32,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-06 18:18:32,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-12-06 18:18:32,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 41 states have (on average 1.146341463414634) internal successors, (47), 43 states have internal predecessors, (47), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-06 18:18:32,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 86 transitions. [2021-12-06 18:18:32,773 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 86 transitions. Word has length 36 [2021-12-06 18:18:32,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:18:32,773 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 86 transitions. [2021-12-06 18:18:32,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 4 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) [2021-12-06 18:18:32,774 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 86 transitions. [2021-12-06 18:18:32,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-06 18:18:32,775 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:18:32,775 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:18:32,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47807b21-400a-4432-9dab-eb597f45a52b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 18:18:32,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47807b21-400a-4432-9dab-eb597f45a52b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-06 18:18:32,977 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:18:32,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:18:32,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1034157389, now seen corresponding path program 1 times [2021-12-06 18:18:32,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:18:32,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008411913] [2021-12-06 18:18:32,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:18:32,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:18:33,015 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 18:18:33,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [570630080] [2021-12-06 18:18:33,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:18:33,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:18:33,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47807b21-400a-4432-9dab-eb597f45a52b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:18:33,017 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47807b21-400a-4432-9dab-eb597f45a52b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:18:33,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47807b21-400a-4432-9dab-eb597f45a52b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 18:18:33,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:33,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-06 18:18:33,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:18:33,652 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 36 proven. 8 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-06 18:18:33,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:19:13,893 WARN L227 SmtUtils]: Spent 21.07s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:20:18,523 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (mod |c_ULTIMATE.start_main_~B~0#1| 4294967296))) (or (not (= (* .cse0 |c_ULTIMATE.start_main_~p~0#1|) |c_ULTIMATE.start_main_~d~0#1|)) (let ((.cse10 (div |c_ULTIMATE.start_main_~d~0#1| 2)) (.cse11 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse5 (= (mod |c_ULTIMATE.start_main_~d~0#1| 2) 0))) (let ((.cse8 (= (mod |c_ULTIMATE.start_main_~p~0#1| 2) 0)) (.cse1 (not .cse5)) (.cse2 (+ .cse10 .cse11)) (.cse4 (+ .cse10 .cse11 1)) (.cse6 (* .cse0 |c_ULTIMATE.start_main_~q~0#1|)) (.cse7 (* .cse0 (div |c_ULTIMATE.start_main_~p~0#1| 2)))) (and (or (let ((.cse3 (+ |c_ULTIMATE.start_main_~r~0#1| .cse6 .cse7))) (and (or (and .cse1 (< |c_ULTIMATE.start_main_~d~0#1| 0)) (= .cse2 .cse3)) (or (= .cse4 .cse3) .cse5 (<= 0 |c_ULTIMATE.start_main_~d~0#1|)))) (and (< |c_ULTIMATE.start_main_~p~0#1| 0) (not .cse8))) (or .cse8 (<= 0 |c_ULTIMATE.start_main_~p~0#1|) (let ((.cse9 (+ |c_ULTIMATE.start_main_~r~0#1| .cse6 .cse0 .cse7))) (and (or .cse1 (= .cse9 .cse2)) (or (= .cse9 .cse4) .cse5))))))) (<= |c_ULTIMATE.start_main_~d~0#1| |c_ULTIMATE.start_main_~r~0#1|))) is different from true [2021-12-06 18:21:45,107 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 36 proven. 3 refuted. 0 times theorem prover too weak. 91 trivial. 5 not checked. [2021-12-06 18:21:45,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:21:45,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008411913] [2021-12-06 18:21:45,107 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 18:21:45,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570630080] [2021-12-06 18:21:45,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570630080] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:21:45,108 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:21:45,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-12-06 18:21:45,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862643791] [2021-12-06 18:21:45,108 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:21:45,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 18:21:45,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:21:45,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 18:21:45,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=245, Unknown=1, NotChecked=32, Total=342 [2021-12-06 18:21:45,110 INFO L87 Difference]: Start difference. First operand 68 states and 86 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 16 states have internal predecessors, (32), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2021-12-06 18:21:51,482 WARN L227 SmtUtils]: Spent 5.85s on a formula simplification. DAG size of input: 60 DAG size of output: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:21:53,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:21:53,857 INFO L93 Difference]: Finished difference Result 93 states and 114 transitions. [2021-12-06 18:21:53,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 18:21:53,857 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 16 states have internal predecessors, (32), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) Word has length 56 [2021-12-06 18:21:53,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:21:53,859 INFO L225 Difference]: With dead ends: 93 [2021-12-06 18:21:53,859 INFO L226 Difference]: Without dead ends: 91 [2021-12-06 18:21:53,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 30.3s TimeCoverageRelationStatistics Valid=119, Invalid=484, Unknown=1, NotChecked=46, Total=650 [2021-12-06 18:21:53,860 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 54 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:21:53,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 113 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 263 Invalid, 0 Unknown, 51 Unchecked, 2.0s Time] [2021-12-06 18:21:53,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-06 18:21:53,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2021-12-06 18:21:53,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 59 states have internal predecessors, (62), 25 states have call successors, (25), 9 states have call predecessors, (25), 9 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2021-12-06 18:21:53,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 111 transitions. [2021-12-06 18:21:53,871 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 111 transitions. Word has length 56 [2021-12-06 18:21:53,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:21:53,872 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 111 transitions. [2021-12-06 18:21:53,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 16 states have internal predecessors, (32), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2021-12-06 18:21:53,872 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 111 transitions. [2021-12-06 18:21:53,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-06 18:21:53,873 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:21:53,873 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:21:53,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47807b21-400a-4432-9dab-eb597f45a52b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 18:21:54,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47807b21-400a-4432-9dab-eb597f45a52b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:21:54,075 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:21:54,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:21:54,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1199454569, now seen corresponding path program 1 times [2021-12-06 18:21:54,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:21:54,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448017141] [2021-12-06 18:21:54,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:21:54,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:21:54,108 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 18:21:54,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [92036417] [2021-12-06 18:21:54,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:21:54,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:21:54,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47807b21-400a-4432-9dab-eb597f45a52b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:21:54,111 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47807b21-400a-4432-9dab-eb597f45a52b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:21:54,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47807b21-400a-4432-9dab-eb597f45a52b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 18:21:54,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:54,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-06 18:21:54,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:21:54,569 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 25 proven. 31 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-06 18:21:54,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:21:57,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:21:57,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448017141] [2021-12-06 18:21:57,229 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 18:21:57,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92036417] [2021-12-06 18:21:57,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92036417] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:21:57,229 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:21:57,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-12-06 18:21:57,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63948000] [2021-12-06 18:21:57,230 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 18:21:57,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 18:21:57,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:21:57,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 18:21:57,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-12-06 18:21:57,231 INFO L87 Difference]: Start difference. First operand 90 states and 111 transitions. Second operand has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-06 18:21:57,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:21:57,837 INFO L93 Difference]: Finished difference Result 118 states and 142 transitions. [2021-12-06 18:21:57,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 18:21:57,837 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 67 [2021-12-06 18:21:57,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:21:57,838 INFO L225 Difference]: With dead ends: 118 [2021-12-06 18:21:57,838 INFO L226 Difference]: Without dead ends: 74 [2021-12-06 18:21:57,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-12-06 18:21:57,839 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 16 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:21:57,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 175 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 18:21:57,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-06 18:21:57,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-12-06 18:21:57,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 49 states have internal predecessors, (51), 17 states have call successors, (17), 9 states have call predecessors, (17), 9 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-06 18:21:57,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2021-12-06 18:21:57,848 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 67 [2021-12-06 18:21:57,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:21:57,848 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2021-12-06 18:21:57,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-06 18:21:57,848 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2021-12-06 18:21:57,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-06 18:21:57,849 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:21:57,849 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:21:57,869 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47807b21-400a-4432-9dab-eb597f45a52b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 18:21:58,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47807b21-400a-4432-9dab-eb597f45a52b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-06 18:21:58,051 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:21:58,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:21:58,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1193302554, now seen corresponding path program 2 times [2021-12-06 18:21:58,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:21:58,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377092082] [2021-12-06 18:21:58,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:21:58,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:21:58,083 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 18:21:58,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [61585975] [2021-12-06 18:21:58,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:21:58,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:21:58,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47807b21-400a-4432-9dab-eb597f45a52b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:21:58,086 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47807b21-400a-4432-9dab-eb597f45a52b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:21:58,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47807b21-400a-4432-9dab-eb597f45a52b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 18:21:58,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:21:58,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:21:58,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-06 18:21:58,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:21:58,872 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 55 proven. 31 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-06 18:21:58,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:22:22,363 WARN L227 SmtUtils]: Spent 5.66s on a formula simplification that was a NOOP. DAG size: 132 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:26:29,831 WARN L227 SmtUtils]: Spent 2.44m on a formula simplification that was a NOOP. DAG size: 136 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)