./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_allDiff2_ground.i --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_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/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_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_allDiff2_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/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_78f0b37b-ab9a-42c3-a482-d50bcff70072/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 45c2395b28f523380bfcff26ce2efb02406d69c6cc122ac9297e3f35ef9c7306 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 18:52:38,639 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 18:52:38,641 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 18:52:38,664 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 18:52:38,664 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 18:52:38,665 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 18:52:38,666 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 18:52:38,668 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 18:52:38,670 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 18:52:38,670 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 18:52:38,671 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 18:52:38,672 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 18:52:38,673 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 18:52:38,674 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 18:52:38,675 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 18:52:38,676 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 18:52:38,676 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 18:52:38,677 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 18:52:38,679 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 18:52:38,680 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 18:52:38,682 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 18:52:38,683 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 18:52:38,684 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 18:52:38,685 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 18:52:38,687 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 18:52:38,688 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 18:52:38,688 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 18:52:38,689 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 18:52:38,689 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 18:52:38,690 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 18:52:38,691 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 18:52:38,691 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 18:52:38,692 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 18:52:38,692 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 18:52:38,693 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 18:52:38,694 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 18:52:38,694 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 18:52:38,694 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 18:52:38,694 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 18:52:38,695 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 18:52:38,696 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 18:52:38,697 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 18:52:38,715 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 18:52:38,715 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 18:52:38,715 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 18:52:38,715 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 18:52:38,716 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 18:52:38,716 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 18:52:38,716 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 18:52:38,716 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 18:52:38,717 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 18:52:38,717 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 18:52:38,717 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 18:52:38,717 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 18:52:38,717 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 18:52:38,717 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 18:52:38,717 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 18:52:38,717 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 18:52:38,717 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 18:52:38,718 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 18:52:38,718 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 18:52:38,718 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 18:52:38,718 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 18:52:38,718 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 18:52:38,718 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 18:52:38,718 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 18:52:38,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:52:38,718 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 18:52:38,719 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 18:52:38,719 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 18:52:38,719 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 18:52:38,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 18:52:38,719 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 18:52:38,719 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 18:52:38,719 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 18:52:38,719 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 18:52:38,719 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_78f0b37b-ab9a-42c3-a482-d50bcff70072/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45c2395b28f523380bfcff26ce2efb02406d69c6cc122ac9297e3f35ef9c7306 [2021-12-06 18:52:38,912 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:52:38,932 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:52:38,934 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:52:38,935 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:52:38,936 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:52:38,937 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-examples/standard_allDiff2_ground.i [2021-12-06 18:52:38,985 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/data/c8e2020b4/ea345f6bb91f4a33aceebff7cbc41fb0/FLAG7ab709785 [2021-12-06 18:52:39,350 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 18:52:39,351 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/sv-benchmarks/c/array-examples/standard_allDiff2_ground.i [2021-12-06 18:52:39,355 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/data/c8e2020b4/ea345f6bb91f4a33aceebff7cbc41fb0/FLAG7ab709785 [2021-12-06 18:52:39,365 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/data/c8e2020b4/ea345f6bb91f4a33aceebff7cbc41fb0 [2021-12-06 18:52:39,367 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 18:52:39,368 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 18:52:39,369 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 18:52:39,369 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 18:52:39,372 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 18:52:39,372 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:52:39" (1/1) ... [2021-12-06 18:52:39,373 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71cce16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:52:39, skipping insertion in model container [2021-12-06 18:52:39,373 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:52:39" (1/1) ... [2021-12-06 18:52:39,380 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 18:52:39,390 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:52:39,507 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_78f0b37b-ab9a-42c3-a482-d50bcff70072/sv-benchmarks/c/array-examples/standard_allDiff2_ground.i[817,830] [2021-12-06 18:52:39,518 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:52:39,523 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 18:52:39,532 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_78f0b37b-ab9a-42c3-a482-d50bcff70072/sv-benchmarks/c/array-examples/standard_allDiff2_ground.i[817,830] [2021-12-06 18:52:39,537 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:52:39,546 INFO L208 MainTranslator]: Completed translation [2021-12-06 18:52:39,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:52:39 WrapperNode [2021-12-06 18:52:39,547 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 18:52:39,548 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 18:52:39,548 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 18:52:39,548 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 18:52:39,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:52:39" (1/1) ... [2021-12-06 18:52:39,558 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:52:39" (1/1) ... [2021-12-06 18:52:39,572 INFO L137 Inliner]: procedures = 16, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2021-12-06 18:52:39,573 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 18:52:39,573 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 18:52:39,573 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 18:52:39,573 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 18:52:39,579 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:52:39" (1/1) ... [2021-12-06 18:52:39,579 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:52:39" (1/1) ... [2021-12-06 18:52:39,580 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:52:39" (1/1) ... [2021-12-06 18:52:39,581 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:52:39" (1/1) ... [2021-12-06 18:52:39,584 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:52:39" (1/1) ... [2021-12-06 18:52:39,587 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:52:39" (1/1) ... [2021-12-06 18:52:39,588 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:52:39" (1/1) ... [2021-12-06 18:52:39,590 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 18:52:39,591 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 18:52:39,591 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 18:52:39,591 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 18:52:39,592 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:52:39" (1/1) ... [2021-12-06 18:52:39,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:52:39,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:52:39,620 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 18:52:39,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 18:52:39,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 18:52:39,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 18:52:39,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 18:52:39,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 18:52:39,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 18:52:39,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 18:52:39,651 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 18:52:39,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 18:52:39,701 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 18:52:39,702 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 18:52:39,783 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 18:52:39,788 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 18:52:39,788 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-06 18:52:39,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:52:39 BoogieIcfgContainer [2021-12-06 18:52:39,789 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 18:52:39,791 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 18:52:39,791 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 18:52:39,793 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 18:52:39,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 06:52:39" (1/3) ... [2021-12-06 18:52:39,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c015a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:52:39, skipping insertion in model container [2021-12-06 18:52:39,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:52:39" (2/3) ... [2021-12-06 18:52:39,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c015a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:52:39, skipping insertion in model container [2021-12-06 18:52:39,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:52:39" (3/3) ... [2021-12-06 18:52:39,795 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_allDiff2_ground.i [2021-12-06 18:52:39,799 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 18:52:39,799 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 18:52:39,834 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 18:52:39,839 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 18:52:39,839 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 18:52:39,850 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:52:39,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 18:52:39,855 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:52:39,856 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:52:39,856 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:52:39,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:52:39,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1932701392, now seen corresponding path program 1 times [2021-12-06 18:52:39,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:52:39,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421916052] [2021-12-06 18:52:39,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:52:39,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:52:39,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:39,985 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 18:52:39,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:52:39,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421916052] [2021-12-06 18:52:39,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421916052] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:52:39,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:52:39,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:52:39,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729916543] [2021-12-06 18:52:39,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:52:39,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:52:39,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:52:40,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:52:40,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:52:40,020 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:52:40,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:52:40,052 INFO L93 Difference]: Finished difference Result 44 states and 68 transitions. [2021-12-06 18:52:40,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:52:40,055 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-06 18:52:40,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:52:40,060 INFO L225 Difference]: With dead ends: 44 [2021-12-06 18:52:40,061 INFO L226 Difference]: Without dead ends: 21 [2021-12-06 18:52:40,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:52:40,067 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:52:40,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 47 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:52:40,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-12-06 18:52:40,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-12-06 18:52:40,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:52:40,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2021-12-06 18:52:40,099 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 10 [2021-12-06 18:52:40,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:52:40,099 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2021-12-06 18:52:40,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:52:40,100 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2021-12-06 18:52:40,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 18:52:40,100 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:52:40,100 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:52:40,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 18:52:40,101 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:52:40,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:52:40,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1277503826, now seen corresponding path program 1 times [2021-12-06 18:52:40,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:52:40,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345982614] [2021-12-06 18:52:40,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:52:40,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:52:40,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:40,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:52:40,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:52:40,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345982614] [2021-12-06 18:52:40,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345982614] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:52:40,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400672567] [2021-12-06 18:52:40,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:52:40,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:52:40,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:52:40,158 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:52:40,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 18:52:40,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:40,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 18:52:40,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:52:40,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:52:40,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:52:40,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400672567] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:52:40,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:52:40,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-12-06 18:52:40,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512343164] [2021-12-06 18:52:40,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:52:40,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:52:40,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:52:40,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:52:40,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:52:40,246 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:52:40,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:52:40,274 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2021-12-06 18:52:40,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:52:40,274 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-06 18:52:40,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:52:40,275 INFO L225 Difference]: With dead ends: 35 [2021-12-06 18:52:40,275 INFO L226 Difference]: Without dead ends: 26 [2021-12-06 18:52:40,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:52:40,277 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:52:40,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 47 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:52:40,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-06 18:52:40,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2021-12-06 18:52:40,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:52:40,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2021-12-06 18:52:40,281 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2021-12-06 18:52:40,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:52:40,281 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2021-12-06 18:52:40,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:52:40,281 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2021-12-06 18:52:40,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-06 18:52:40,282 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:52:40,282 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:52:40,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 18:52:40,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:52:40,484 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:52:40,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:52:40,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1548598205, now seen corresponding path program 1 times [2021-12-06 18:52:40,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:52:40,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926385778] [2021-12-06 18:52:40,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:52:40,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:52:40,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:40,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:52:40,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:52:40,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926385778] [2021-12-06 18:52:40,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926385778] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:52:40,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914506071] [2021-12-06 18:52:40,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:52:40,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:52:40,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:52:40,604 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:52:40,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 18:52:40,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:40,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 18:52:40,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:52:40,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:52:40,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:52:40,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:52:40,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914506071] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:52:40,723 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:52:40,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-06 18:52:40,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519810397] [2021-12-06 18:52:40,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:52:40,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:52:40,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:52:40,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:52:40,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:52:40,725 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:52:40,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:52:40,761 INFO L93 Difference]: Finished difference Result 71 states and 91 transitions. [2021-12-06 18:52:40,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:52:40,762 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-06 18:52:40,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:52:40,763 INFO L225 Difference]: With dead ends: 71 [2021-12-06 18:52:40,763 INFO L226 Difference]: Without dead ends: 55 [2021-12-06 18:52:40,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:52:40,764 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 50 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:52:40,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 62 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:52:40,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-06 18:52:40,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 27. [2021-12-06 18:52:40,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:52:40,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2021-12-06 18:52:40,769 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 15 [2021-12-06 18:52:40,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:52:40,770 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2021-12-06 18:52:40,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:52:40,770 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2021-12-06 18:52:40,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-06 18:52:40,770 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:52:40,771 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:52:40,790 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 18:52:40,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:52:40,973 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:52:40,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:52:40,975 INFO L85 PathProgramCache]: Analyzing trace with hash 515426679, now seen corresponding path program 2 times [2021-12-06 18:52:40,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:52:40,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426751990] [2021-12-06 18:52:40,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:52:40,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:52:41,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:41,135 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 18:52:41,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:52:41,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426751990] [2021-12-06 18:52:41,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426751990] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:52:41,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:52:41,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:52:41,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100495621] [2021-12-06 18:52:41,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:52:41,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:52:41,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:52:41,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:52:41,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:52:41,137 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:52:41,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:52:41,164 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2021-12-06 18:52:41,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:52:41,164 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-06 18:52:41,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:52:41,165 INFO L225 Difference]: With dead ends: 46 [2021-12-06 18:52:41,165 INFO L226 Difference]: Without dead ends: 32 [2021-12-06 18:52:41,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:52:41,166 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:52:41,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 46 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:52:41,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-06 18:52:41,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2021-12-06 18:52:41,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:52:41,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-12-06 18:52:41,170 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 21 [2021-12-06 18:52:41,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:52:41,171 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-12-06 18:52:41,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:52:41,171 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-12-06 18:52:41,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 18:52:41,171 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:52:41,171 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:52:41,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 18:52:41,172 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:52:41,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:52:41,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1658369263, now seen corresponding path program 1 times [2021-12-06 18:52:41,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:52:41,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103970630] [2021-12-06 18:52:41,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:52:41,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:52:41,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:41,243 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 18:52:41,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:52:41,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103970630] [2021-12-06 18:52:41,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103970630] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:52:41,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387189068] [2021-12-06 18:52:41,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:52:41,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:52:41,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:52:41,245 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:52:41,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 18:52:41,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:41,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 18:52:41,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:52:41,338 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:52:41,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:52:41,406 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:52:41,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387189068] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:52:41,406 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:52:41,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2021-12-06 18:52:41,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118111548] [2021-12-06 18:52:41,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:52:41,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 18:52:41,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:52:41,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 18:52:41,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=155, Unknown=0, NotChecked=0, Total=272 [2021-12-06 18:52:41,408 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:52:41,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:52:41,560 INFO L93 Difference]: Finished difference Result 97 states and 136 transitions. [2021-12-06 18:52:41,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 18:52:41,560 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-06 18:52:41,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:52:41,561 INFO L225 Difference]: With dead ends: 97 [2021-12-06 18:52:41,561 INFO L226 Difference]: Without dead ends: 80 [2021-12-06 18:52:41,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=259, Invalid=443, Unknown=0, NotChecked=0, Total=702 [2021-12-06 18:52:41,563 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 192 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:52:41,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 69 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:52:41,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-06 18:52:41,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-12-06 18:52:41,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.2784810126582278) internal successors, (101), 79 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:52:41,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 101 transitions. [2021-12-06 18:52:41,571 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 101 transitions. Word has length 24 [2021-12-06 18:52:41,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:52:41,571 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 101 transitions. [2021-12-06 18:52:41,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:52:41,571 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 101 transitions. [2021-12-06 18:52:41,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-06 18:52:41,573 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:52:41,573 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:52:41,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 18:52:41,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:52:41,775 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:52:41,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:52:41,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1935549725, now seen corresponding path program 2 times [2021-12-06 18:52:41,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:52:41,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850405839] [2021-12-06 18:52:41,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:52:41,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:52:41,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:41,995 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-06 18:52:41,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:52:41,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850405839] [2021-12-06 18:52:41,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850405839] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:52:41,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669253377] [2021-12-06 18:52:41,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:52:41,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:52:41,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:52:41,996 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:52:41,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 18:52:42,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:52:42,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:52:42,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 18:52:42,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:52:42,116 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-06 18:52:42,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:52:42,272 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-06 18:52:42,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669253377] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:52:42,272 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:52:42,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-06 18:52:42,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012722930] [2021-12-06 18:52:42,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:52:42,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 18:52:42,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:52:42,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 18:52:42,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-06 18:52:42,274 INFO L87 Difference]: Start difference. First operand 80 states and 101 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:52:42,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:52:42,424 INFO L93 Difference]: Finished difference Result 329 states and 430 transitions. [2021-12-06 18:52:42,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 18:52:42,424 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-12-06 18:52:42,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:52:42,427 INFO L225 Difference]: With dead ends: 329 [2021-12-06 18:52:42,427 INFO L226 Difference]: Without dead ends: 272 [2021-12-06 18:52:42,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-06 18:52:42,429 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 493 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:52:42,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [493 Valid, 284 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:52:42,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-12-06 18:52:42,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 104. [2021-12-06 18:52:42,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.2135922330097086) internal successors, (125), 103 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:52:42,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 125 transitions. [2021-12-06 18:52:42,445 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 125 transitions. Word has length 60 [2021-12-06 18:52:42,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:52:42,446 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 125 transitions. [2021-12-06 18:52:42,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:52:42,446 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 125 transitions. [2021-12-06 18:52:42,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-06 18:52:42,449 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:52:42,449 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:52:42,469 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 18:52:42,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-06 18:52:42,650 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:52:42,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:52:42,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1156211659, now seen corresponding path program 3 times [2021-12-06 18:52:42,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:52:42,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192529565] [2021-12-06 18:52:42,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:52:42,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:52:42,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:42,950 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-06 18:52:42,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:52:42,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192529565] [2021-12-06 18:52:42,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192529565] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:52:42,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165274463] [2021-12-06 18:52:42,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:52:42,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:52:42,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:52:42,951 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:52:42,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 18:52:43,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 18:52:43,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:52:43,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 18:52:43,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:52:43,157 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 584 trivial. 0 not checked. [2021-12-06 18:52:43,157 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:52:43,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165274463] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:52:43,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:52:43,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [25] total 29 [2021-12-06 18:52:43,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270177303] [2021-12-06 18:52:43,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:52:43,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:52:43,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:52:43,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:52:43,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2021-12-06 18:52:43,160 INFO L87 Difference]: Start difference. First operand 104 states and 125 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:52:43,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:52:43,213 INFO L93 Difference]: Finished difference Result 193 states and 255 transitions. [2021-12-06 18:52:43,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 18:52:43,213 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-12-06 18:52:43,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:52:43,215 INFO L225 Difference]: With dead ends: 193 [2021-12-06 18:52:43,215 INFO L226 Difference]: Without dead ends: 184 [2021-12-06 18:52:43,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=324, Invalid=606, Unknown=0, NotChecked=0, Total=930 [2021-12-06 18:52:43,216 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 16 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:52:43,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 44 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:52:43,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-12-06 18:52:43,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 105. [2021-12-06 18:52:43,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.2211538461538463) internal successors, (127), 104 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:52:43,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 127 transitions. [2021-12-06 18:52:43,231 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 127 transitions. Word has length 84 [2021-12-06 18:52:43,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:52:43,231 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 127 transitions. [2021-12-06 18:52:43,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:52:43,232 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 127 transitions. [2021-12-06 18:52:43,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-06 18:52:43,233 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:52:43,233 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:52:43,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 18:52:43,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:52:43,435 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:52:43,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:52:43,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1290299501, now seen corresponding path program 4 times [2021-12-06 18:52:43,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:52:43,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997577669] [2021-12-06 18:52:43,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:52:43,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:52:43,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:43,766 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-12-06 18:52:43,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:52:43,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997577669] [2021-12-06 18:52:43,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997577669] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:52:43,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641508645] [2021-12-06 18:52:43,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:52:43,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:52:43,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:52:43,768 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:52:43,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 18:52:43,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:52:43,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:52:43,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 18:52:43,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:52:43,944 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-12-06 18:52:43,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:52:44,363 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-12-06 18:52:44,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641508645] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:52:44,363 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:52:44,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2021-12-06 18:52:44,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644325251] [2021-12-06 18:52:44,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:52:44,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-06 18:52:44,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:52:44,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-06 18:52:44,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-06 18:52:44,366 INFO L87 Difference]: Start difference. First operand 105 states and 127 transitions. Second operand has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:52:44,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:52:44,893 INFO L93 Difference]: Finished difference Result 825 states and 1072 transitions. [2021-12-06 18:52:44,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-06 18:52:44,894 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-12-06 18:52:44,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:52:44,898 INFO L225 Difference]: With dead ends: 825 [2021-12-06 18:52:44,898 INFO L226 Difference]: Without dead ends: 767 [2021-12-06 18:52:44,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-06 18:52:44,900 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2070 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2070 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:52:44,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2070 Valid, 586 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:52:44,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2021-12-06 18:52:44,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 153. [2021-12-06 18:52:44,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.1513157894736843) internal successors, (175), 152 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:52:44,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 175 transitions. [2021-12-06 18:52:44,915 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 175 transitions. Word has length 87 [2021-12-06 18:52:44,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:52:44,915 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 175 transitions. [2021-12-06 18:52:44,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:52:44,915 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 175 transitions. [2021-12-06 18:52:44,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 18:52:44,917 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:52:44,917 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:52:44,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 18:52:45,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-06 18:52:45,118 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:52:45,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:52:45,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1107291293, now seen corresponding path program 5 times [2021-12-06 18:52:45,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:52:45,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634183354] [2021-12-06 18:52:45,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:52:45,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:52:45,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:45,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2254 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-12-06 18:52:45,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:52:45,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634183354] [2021-12-06 18:52:45,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634183354] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:52:45,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843883514] [2021-12-06 18:52:45,745 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:52:45,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:52:45,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:52:45,746 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:52:45,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 18:52:56,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2021-12-06 18:52:56,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:52:56,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 18:52:56,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:52:57,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2254 backedges. 120 proven. 15 refuted. 0 times theorem prover too weak. 2119 trivial. 0 not checked. [2021-12-06 18:52:57,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:52:57,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2254 backedges. 127 proven. 8 refuted. 0 times theorem prover too weak. 2119 trivial. 0 not checked. [2021-12-06 18:52:57,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843883514] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:52:57,363 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:52:57,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 13, 13] total 71 [2021-12-06 18:52:57,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253967862] [2021-12-06 18:52:57,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:52:57,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-12-06 18:52:57,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:52:57,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-12-06 18:52:57,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1379, Invalid=3591, Unknown=0, NotChecked=0, Total=4970 [2021-12-06 18:52:57,366 INFO L87 Difference]: Start difference. First operand 153 states and 175 transitions. Second operand has 71 states, 71 states have (on average 2.323943661971831) internal successors, (165), 71 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:53:01,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:53:01,659 INFO L93 Difference]: Finished difference Result 568 states and 850 transitions. [2021-12-06 18:53:01,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2021-12-06 18:53:01,659 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.323943661971831) internal successors, (165), 71 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-12-06 18:53:01,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:53:01,662 INFO L225 Difference]: With dead ends: 568 [2021-12-06 18:53:01,662 INFO L226 Difference]: Without dead ends: 510 [2021-12-06 18:53:01,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18900 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=17310, Invalid=45942, Unknown=0, NotChecked=0, Total=63252 [2021-12-06 18:53:01,676 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 2467 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 1642 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2467 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 2352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1642 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:53:01,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2467 Valid, 227 Invalid, 2352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1642 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 18:53:01,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-12-06 18:53:01,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 501. [2021-12-06 18:53:01,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 1.27) internal successors, (635), 500 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:53:01,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 635 transitions. [2021-12-06 18:53:01,737 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 635 transitions. Word has length 135 [2021-12-06 18:53:01,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:53:01,738 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 635 transitions. [2021-12-06 18:53:01,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.323943661971831) internal successors, (165), 71 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:53:01,738 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 635 transitions. [2021-12-06 18:53:01,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2021-12-06 18:53:01,744 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:53:01,745 INFO L514 BasicCegarLoop]: trace histogram [85, 85, 85, 47, 47, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:53:01,770 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 18:53:01,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-06 18:53:01,947 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:53:01,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:53:01,948 INFO L85 PathProgramCache]: Analyzing trace with hash -151095726, now seen corresponding path program 6 times [2021-12-06 18:53:01,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:53:01,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141727649] [2021-12-06 18:53:01,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:53:01,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:53:02,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:53:02,728 INFO L134 CoverageAnalysis]: Checked inductivity of 19980 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 17771 trivial. 0 not checked. [2021-12-06 18:53:02,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:53:02,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141727649] [2021-12-06 18:53:02,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141727649] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:53:02,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902655441] [2021-12-06 18:53:02,728 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:53:02,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:53:02,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:53:02,729 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:53:02,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 18:53:02,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-06 18:53:02,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:53:02,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 18:53:02,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:53:03,286 INFO L134 CoverageAnalysis]: Checked inductivity of 19980 backedges. 7686 proven. 26 refuted. 0 times theorem prover too weak. 12268 trivial. 0 not checked. [2021-12-06 18:53:03,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:53:03,682 INFO L134 CoverageAnalysis]: Checked inductivity of 19980 backedges. 7690 proven. 22 refuted. 0 times theorem prover too weak. 12268 trivial. 0 not checked. [2021-12-06 18:53:03,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902655441] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:53:03,683 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:53:03,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 10, 10] total 62 [2021-12-06 18:53:03,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591767880] [2021-12-06 18:53:03,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:53:03,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-12-06 18:53:03,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:53:03,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-12-06 18:53:03,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1267, Invalid=2515, Unknown=0, NotChecked=0, Total=3782 [2021-12-06 18:53:03,685 INFO L87 Difference]: Start difference. First operand 501 states and 635 transitions. Second operand has 62 states, 62 states have (on average 2.3548387096774195) internal successors, (146), 62 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:53:14,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:53:14,633 INFO L93 Difference]: Finished difference Result 1487 states and 2033 transitions. [2021-12-06 18:53:14,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 426 states. [2021-12-06 18:53:14,633 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.3548387096774195) internal successors, (146), 62 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 497 [2021-12-06 18:53:14,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:53:14,638 INFO L225 Difference]: With dead ends: 1487 [2021-12-06 18:53:14,638 INFO L226 Difference]: Without dead ends: 1083 [2021-12-06 18:53:14,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1664 GetRequests, 1229 SyntacticMatches, 0 SemanticMatches, 435 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76625 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=33975, Invalid=156557, Unknown=0, NotChecked=0, Total=190532 [2021-12-06 18:53:14,650 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 5568 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 3058 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5568 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 3654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3058 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:53:14,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5568 Valid, 350 Invalid, 3654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3058 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 18:53:14,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2021-12-06 18:53:14,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 685. [2021-12-06 18:53:14,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 684 states have (on average 1.2850877192982457) internal successors, (879), 684 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:53:14,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 879 transitions. [2021-12-06 18:53:14,724 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 879 transitions. Word has length 497 [2021-12-06 18:53:14,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:53:14,725 INFO L470 AbstractCegarLoop]: Abstraction has 685 states and 879 transitions. [2021-12-06 18:53:14,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.3548387096774195) internal successors, (146), 62 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:53:14,725 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 879 transitions. [2021-12-06 18:53:14,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 614 [2021-12-06 18:53:14,735 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:53:14,735 INFO L514 BasicCegarLoop]: trace histogram [123, 123, 123, 48, 48, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:53:14,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 18:53:14,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:53:14,937 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:53:14,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:53:14,939 INFO L85 PathProgramCache]: Analyzing trace with hash -159878554, now seen corresponding path program 7 times [2021-12-06 18:53:14,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:53:14,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756572040] [2021-12-06 18:53:14,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:53:14,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:53:15,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:53:15,717 INFO L134 CoverageAnalysis]: Checked inductivity of 33622 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 31318 trivial. 0 not checked. [2021-12-06 18:53:15,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:53:15,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756572040] [2021-12-06 18:53:15,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756572040] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:53:15,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925569747] [2021-12-06 18:53:15,718 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:53:15,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:53:15,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:53:15,718 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:53:15,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 18:53:15,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:53:15,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 2289 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-06 18:53:15,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:53:16,397 INFO L134 CoverageAnalysis]: Checked inductivity of 33622 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 31318 trivial. 0 not checked. [2021-12-06 18:53:16,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:53:18,185 INFO L134 CoverageAnalysis]: Checked inductivity of 33622 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 31318 trivial. 0 not checked. [2021-12-06 18:53:18,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925569747] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:53:18,186 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:53:18,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2021-12-06 18:53:18,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49063875] [2021-12-06 18:53:18,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:53:18,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-12-06 18:53:18,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:53:18,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-12-06 18:53:18,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2021-12-06 18:53:18,190 INFO L87 Difference]: Start difference. First operand 685 states and 879 transitions. Second operand has 101 states, 101 states have (on average 2.108910891089109) internal successors, (213), 101 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:53:20,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:53:20,909 INFO L93 Difference]: Finished difference Result 2442 states and 3185 transitions. [2021-12-06 18:53:20,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-12-06 18:53:20,910 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.108910891089109) internal successors, (213), 101 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 613 [2021-12-06 18:53:20,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:53:20,917 INFO L225 Difference]: With dead ends: 2442 [2021-12-06 18:53:20,917 INFO L226 Difference]: Without dead ends: 1856 [2021-12-06 18:53:20,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1275 GetRequests, 1176 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2021-12-06 18:53:20,919 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 5260 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 493 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5260 SdHoareTripleChecker+Valid, 961 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 493 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:53:20,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5260 Valid, 961 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [493 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 18:53:20,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1856 states. [2021-12-06 18:53:21,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1856 to 785. [2021-12-06 18:53:21,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 1.2487244897959184) internal successors, (979), 784 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:53:21,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 979 transitions. [2021-12-06 18:53:21,003 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 979 transitions. Word has length 613 [2021-12-06 18:53:21,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:53:21,003 INFO L470 AbstractCegarLoop]: Abstraction has 785 states and 979 transitions. [2021-12-06 18:53:21,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.108910891089109) internal successors, (213), 101 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:53:21,003 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 979 transitions. [2021-12-06 18:53:21,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 714 [2021-12-06 18:53:21,007 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:53:21,007 INFO L514 BasicCegarLoop]: trace histogram [123, 123, 123, 98, 98, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:53:21,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 18:53:21,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 18:53:21,209 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:53:21,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:53:21,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1526395650, now seen corresponding path program 8 times [2021-12-06 18:53:21,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:53:21,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534179685] [2021-12-06 18:53:21,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:53:21,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:53:21,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:53:23,354 INFO L134 CoverageAnalysis]: Checked inductivity of 40922 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 31318 trivial. 0 not checked. [2021-12-06 18:53:23,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:53:23,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534179685] [2021-12-06 18:53:23,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534179685] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:53:23,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775668459] [2021-12-06 18:53:23,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:53:23,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:53:23,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:53:23,356 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:53:23,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 18:53:23,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:53:23,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:53:23,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 2739 conjuncts, 100 conjunts are in the unsatisfiable core [2021-12-06 18:53:23,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:53:24,158 INFO L134 CoverageAnalysis]: Checked inductivity of 40922 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 31318 trivial. 0 not checked. [2021-12-06 18:53:24,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:53:30,065 INFO L134 CoverageAnalysis]: Checked inductivity of 40922 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 31318 trivial. 0 not checked. [2021-12-06 18:53:30,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775668459] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:53:30,065 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:53:30,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 201 [2021-12-06 18:53:30,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471944751] [2021-12-06 18:53:30,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:53:30,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 201 states [2021-12-06 18:53:30,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:53:30,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 201 interpolants. [2021-12-06 18:53:30,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20100, Invalid=20100, Unknown=0, NotChecked=0, Total=40200 [2021-12-06 18:53:30,073 INFO L87 Difference]: Start difference. First operand 785 states and 979 transitions. Second operand has 201 states, 201 states have (on average 2.054726368159204) internal successors, (413), 201 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:54:06,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:54:06,242 INFO L93 Difference]: Finished difference Result 4742 states and 6135 transitions. [2021-12-06 18:54:06,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2021-12-06 18:54:06,243 INFO L78 Accepts]: Start accepts. Automaton has has 201 states, 201 states have (on average 2.054726368159204) internal successors, (413), 201 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 713 [2021-12-06 18:54:06,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:54:06,258 INFO L225 Difference]: With dead ends: 4742 [2021-12-06 18:54:06,258 INFO L226 Difference]: Without dead ends: 4156 [2021-12-06 18:54:06,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1525 GetRequests, 1326 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=20100, Invalid=20100, Unknown=0, NotChecked=0, Total=40200 [2021-12-06 18:54:06,261 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 14257 mSDsluCounter, 2338 mSDsCounter, 0 mSdLazyCounter, 1160 mSolverCounterSat, 1212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14257 SdHoareTripleChecker+Valid, 2356 SdHoareTripleChecker+Invalid, 2372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1212 IncrementalHoareTripleChecker+Valid, 1160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:54:06,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14257 Valid, 2356 Invalid, 2372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1212 Valid, 1160 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 18:54:06,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4156 states. [2021-12-06 18:54:06,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4156 to 985. [2021-12-06 18:54:06,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 1.1981707317073171) internal successors, (1179), 984 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:54:06,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1179 transitions. [2021-12-06 18:54:06,360 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1179 transitions. Word has length 713 [2021-12-06 18:54:06,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:54:06,361 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 1179 transitions. [2021-12-06 18:54:06,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 201 states, 201 states have (on average 2.054726368159204) internal successors, (413), 201 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:54:06,361 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1179 transitions. [2021-12-06 18:54:06,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 914 [2021-12-06 18:54:06,366 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:54:06,367 INFO L514 BasicCegarLoop]: trace histogram [198, 198, 123, 123, 123, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:54:06,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 18:54:06,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:54:06,568 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:54:06,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:54:06,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1081932346, now seen corresponding path program 9 times [2021-12-06 18:54:06,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:54:06,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309022059] [2021-12-06 18:54:06,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:54:06,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:54:06,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:54:14,118 INFO L134 CoverageAnalysis]: Checked inductivity of 70522 backedges. 0 proven. 39204 refuted. 0 times theorem prover too weak. 31318 trivial. 0 not checked. [2021-12-06 18:54:14,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:54:14,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309022059] [2021-12-06 18:54:14,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309022059] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:54:14,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246430176] [2021-12-06 18:54:14,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:54:14,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:54:14,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:54:14,119 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:54:14,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 18:54:14,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-06 18:54:14,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:54:14,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 18:54:14,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:54:15,112 INFO L134 CoverageAnalysis]: Checked inductivity of 70522 backedges. 1471 proven. 12 refuted. 0 times theorem prover too weak. 69039 trivial. 0 not checked. [2021-12-06 18:54:15,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:54:16,133 INFO L134 CoverageAnalysis]: Checked inductivity of 70522 backedges. 1471 proven. 12 refuted. 0 times theorem prover too weak. 69039 trivial. 0 not checked. [2021-12-06 18:54:16,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246430176] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:54:16,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:54:16,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [201, 9, 9] total 214 [2021-12-06 18:54:16,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259659998] [2021-12-06 18:54:16,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:54:16,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 214 states [2021-12-06 18:54:16,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:54:16,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 214 interpolants. [2021-12-06 18:54:16,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21367, Invalid=24215, Unknown=0, NotChecked=0, Total=45582 [2021-12-06 18:54:16,140 INFO L87 Difference]: Start difference. First operand 985 states and 1179 transitions. Second operand has 214 states, 214 states have (on average 2.102803738317757) internal successors, (450), 214 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:31,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:00:31,138 INFO L93 Difference]: Finished difference Result 22143 states and 30443 transitions. [2021-12-06 19:00:31,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1607 states. [2021-12-06 19:00:31,139 INFO L78 Accepts]: Start accepts. Automaton has has 214 states, 214 states have (on average 2.102803738317757) internal successors, (450), 214 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 913 [2021-12-06 19:00:31,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:00:31,216 INFO L225 Difference]: With dead ends: 22143 [2021-12-06 19:00:31,217 INFO L226 Difference]: Without dead ends: 21358 [2021-12-06 19:00:31,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4221 GetRequests, 2613 SyntacticMatches, 0 SemanticMatches, 1608 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047611 ImplicationChecksByTransitivity, 118.3s TimeCoverageRelationStatistics Valid=507454, Invalid=2083036, Unknown=0, NotChecked=0, Total=2590490 [2021-12-06 19:00:31,384 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 27419 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 1715 mSolverCounterSat, 9497 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27419 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 11212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 9497 IncrementalHoareTripleChecker+Valid, 1715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-12-06 19:00:31,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27419 Valid, 523 Invalid, 11212 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [9497 Valid, 1715 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2021-12-06 19:00:31,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21358 states. [2021-12-06 19:00:33,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21358 to 3450. [2021-12-06 19:00:33,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3450 states, 3449 states have (on average 1.3528559002609453) internal successors, (4666), 3449 states have internal predecessors, (4666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:33,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3450 states to 3450 states and 4666 transitions. [2021-12-06 19:00:33,330 INFO L78 Accepts]: Start accepts. Automaton has 3450 states and 4666 transitions. Word has length 913 [2021-12-06 19:00:33,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:00:33,331 INFO L470 AbstractCegarLoop]: Abstraction has 3450 states and 4666 transitions. [2021-12-06 19:00:33,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 214 states, 214 states have (on average 2.102803738317757) internal successors, (450), 214 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:33,331 INFO L276 IsEmpty]: Start isEmpty. Operand 3450 states and 4666 transitions. [2021-12-06 19:00:33,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3383 [2021-12-06 19:00:33,378 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:00:33,380 INFO L514 BasicCegarLoop]: trace histogram [791, 791, 791, 201, 201, 199, 199, 199, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:00:33,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 19:00:33,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 19:00:33,581 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:00:33,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:00:33,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1976080627, now seen corresponding path program 10 times [2021-12-06 19:00:33,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:00:33,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564398611] [2021-12-06 19:00:33,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:00:33,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:00:34,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:00:43,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1194447 backedges. 0 proven. 40401 refuted. 0 times theorem prover too weak. 1154046 trivial. 0 not checked. [2021-12-06 19:00:43,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:00:43,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564398611] [2021-12-06 19:00:43,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564398611] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:00:43,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089028722] [2021-12-06 19:00:43,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 19:00:43,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:00:43,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:00:43,959 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:00:43,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f0b37b-ab9a-42c3-a482-d50bcff70072/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 19:00:45,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 19:00:45,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:00:45,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 12753 conjuncts, 203 conjunts are in the unsatisfiable core [2021-12-06 19:00:45,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:00:47,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1194447 backedges. 0 proven. 40401 refuted. 0 times theorem prover too weak. 1154046 trivial. 0 not checked. [2021-12-06 19:00:47,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:01:12,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1194447 backedges. 0 proven. 40401 refuted. 0 times theorem prover too weak. 1154046 trivial. 0 not checked. [2021-12-06 19:01:12,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089028722] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:01:12,955 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:01:12,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [204, 204, 204] total 407 [2021-12-06 19:01:12,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813406204] [2021-12-06 19:01:12,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:01:12,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 407 states [2021-12-06 19:01:12,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:01:12,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 407 interpolants. [2021-12-06 19:01:12,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82621, Invalid=82621, Unknown=0, NotChecked=0, Total=165242 [2021-12-06 19:01:12,979 INFO L87 Difference]: Start difference. First operand 3450 states and 4666 transitions. Second operand has 407 states, 407 states have (on average 2.027027027027027) internal successors, (825), 407 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)