./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/pnr4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/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_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/pnr4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/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_99f60d66-383a-487e-8c47-2b644ebf1be8/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 c2f943c7ce97bf9be3e11b9d2df150d740ebe8f456342884d8ad0d40610fb008 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 18:28:47,495 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 18:28:47,497 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 18:28:47,527 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 18:28:47,528 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 18:28:47,529 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 18:28:47,531 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 18:28:47,533 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 18:28:47,535 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 18:28:47,536 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 18:28:47,538 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 18:28:47,539 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 18:28:47,539 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 18:28:47,541 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 18:28:47,542 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 18:28:47,544 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 18:28:47,544 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 18:28:47,546 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 18:28:47,548 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 18:28:47,551 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 18:28:47,553 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 18:28:47,554 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 18:28:47,555 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 18:28:47,556 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 18:28:47,559 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 18:28:47,560 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 18:28:47,560 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 18:28:47,561 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 18:28:47,562 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 18:28:47,563 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 18:28:47,563 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 18:28:47,564 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 18:28:47,565 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 18:28:47,566 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 18:28:47,567 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 18:28:47,567 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 18:28:47,568 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 18:28:47,568 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 18:28:47,568 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 18:28:47,569 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 18:28:47,569 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 18:28:47,570 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 18:28:47,592 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 18:28:47,592 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 18:28:47,592 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 18:28:47,592 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 18:28:47,593 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 18:28:47,593 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 18:28:47,594 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 18:28:47,594 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 18:28:47,594 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 18:28:47,595 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 18:28:47,595 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 18:28:47,595 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 18:28:47,595 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 18:28:47,595 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 18:28:47,596 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 18:28:47,596 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 18:28:47,596 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 18:28:47,596 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 18:28:47,596 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 18:28:47,596 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 18:28:47,597 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 18:28:47,597 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 18:28:47,597 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 18:28:47,597 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 18:28:47,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:28:47,598 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 18:28:47,598 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 18:28:47,598 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 18:28:47,598 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 18:28:47,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 18:28:47,599 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 18:28:47,599 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 18:28:47,599 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 18:28:47,599 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 18:28:47,599 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_99f60d66-383a-487e-8c47-2b644ebf1be8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2f943c7ce97bf9be3e11b9d2df150d740ebe8f456342884d8ad0d40610fb008 [2021-12-06 18:28:47,789 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:28:47,803 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:28:47,805 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:28:47,806 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:28:47,806 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:28:47,807 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-tiling/pnr4.c [2021-12-06 18:28:47,846 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/data/39db1a360/2b58f158fcc04b5e89837dfa19776ecb/FLAG5e2b5a302 [2021-12-06 18:28:48,199 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 18:28:48,199 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/sv-benchmarks/c/array-tiling/pnr4.c [2021-12-06 18:28:48,204 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/data/39db1a360/2b58f158fcc04b5e89837dfa19776ecb/FLAG5e2b5a302 [2021-12-06 18:28:48,215 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/data/39db1a360/2b58f158fcc04b5e89837dfa19776ecb [2021-12-06 18:28:48,218 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 18:28:48,219 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 18:28:48,220 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 18:28:48,220 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 18:28:48,223 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 18:28:48,223 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:28:48" (1/1) ... [2021-12-06 18:28:48,224 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8cc68e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:48, skipping insertion in model container [2021-12-06 18:28:48,224 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:28:48" (1/1) ... [2021-12-06 18:28:48,229 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 18:28:48,241 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:28:48,365 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_99f60d66-383a-487e-8c47-2b644ebf1be8/sv-benchmarks/c/array-tiling/pnr4.c[395,408] [2021-12-06 18:28:48,383 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:28:48,390 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 18:28:48,400 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_99f60d66-383a-487e-8c47-2b644ebf1be8/sv-benchmarks/c/array-tiling/pnr4.c[395,408] [2021-12-06 18:28:48,410 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:28:48,422 INFO L208 MainTranslator]: Completed translation [2021-12-06 18:28:48,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:48 WrapperNode [2021-12-06 18:28:48,422 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 18:28:48,423 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 18:28:48,423 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 18:28:48,424 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 18:28:48,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:48" (1/1) ... [2021-12-06 18:28:48,434 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:48" (1/1) ... [2021-12-06 18:28:48,457 INFO L137 Inliner]: procedures = 17, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 91 [2021-12-06 18:28:48,457 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 18:28:48,458 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 18:28:48,458 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 18:28:48,458 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 18:28:48,465 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:48" (1/1) ... [2021-12-06 18:28:48,465 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:48" (1/1) ... [2021-12-06 18:28:48,467 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:48" (1/1) ... [2021-12-06 18:28:48,468 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:48" (1/1) ... [2021-12-06 18:28:48,474 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:48" (1/1) ... [2021-12-06 18:28:48,478 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:48" (1/1) ... [2021-12-06 18:28:48,480 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:48" (1/1) ... [2021-12-06 18:28:48,482 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 18:28:48,483 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 18:28:48,483 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 18:28:48,483 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 18:28:48,484 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:48" (1/1) ... [2021-12-06 18:28:48,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:28:48,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:48,508 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 18:28:48,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 18:28:48,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 18:28:48,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 18:28:48,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 18:28:48,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 18:28:48,537 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2021-12-06 18:28:48,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2021-12-06 18:28:48,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 18:28:48,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 18:28:48,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 18:28:48,586 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 18:28:48,587 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 18:28:48,703 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 18:28:48,708 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 18:28:48,708 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 18:28:48,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:28:48 BoogieIcfgContainer [2021-12-06 18:28:48,710 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 18:28:48,711 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 18:28:48,711 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 18:28:48,714 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 18:28:48,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 06:28:48" (1/3) ... [2021-12-06 18:28:48,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52ffb991 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:28:48, skipping insertion in model container [2021-12-06 18:28:48,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:48" (2/3) ... [2021-12-06 18:28:48,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52ffb991 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:28:48, skipping insertion in model container [2021-12-06 18:28:48,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:28:48" (3/3) ... [2021-12-06 18:28:48,716 INFO L111 eAbstractionObserver]: Analyzing ICFG pnr4.c [2021-12-06 18:28:48,720 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 18:28:48,720 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 18:28:48,756 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 18:28:48,761 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 18:28:48,761 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 18:28:48,774 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 18:28:48,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 18:28:48,777 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:48,778 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:48,778 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:28:48,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:48,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1807585031, now seen corresponding path program 1 times [2021-12-06 18:28:48,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:48,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451080081] [2021-12-06 18:28:48,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:48,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:48,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:49,057 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 18:28:49,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:49,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451080081] [2021-12-06 18:28:49,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451080081] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:28:49,059 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:28:49,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:28:49,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942686236] [2021-12-06 18:28:49,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:28:49,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:28:49,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:49,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:28:49,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:28:49,091 INFO L87 Difference]: Start difference. First operand has 34 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 18:28:49,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:49,202 INFO L93 Difference]: Finished difference Result 84 states and 117 transitions. [2021-12-06 18:28:49,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:28:49,205 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 11 [2021-12-06 18:28:49,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:49,211 INFO L225 Difference]: With dead ends: 84 [2021-12-06 18:28:49,211 INFO L226 Difference]: Without dead ends: 44 [2021-12-06 18:28:49,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:28:49,216 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 72 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:49,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 52 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:28:49,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-06 18:28:49,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2021-12-06 18:28:49,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 18:28:49,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2021-12-06 18:28:49,255 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 11 [2021-12-06 18:28:49,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:49,255 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2021-12-06 18:28:49,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 18:28:49,256 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2021-12-06 18:28:49,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 18:28:49,258 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:49,258 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:49,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 18:28:49,259 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:28:49,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:49,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1998588124, now seen corresponding path program 1 times [2021-12-06 18:28:49,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:49,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067896590] [2021-12-06 18:28:49,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:49,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:49,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:49,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:28:49,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:49,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:28:49,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:49,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:28:49,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:49,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:28:49,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:49,507 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 18:28:49,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:49,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067896590] [2021-12-06 18:28:49,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067896590] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:49,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336677651] [2021-12-06 18:28:49,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:49,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:49,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:49,510 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:49,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 18:28:49,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:49,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 18:28:49,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:49,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 18:28:49,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:28:49,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2021-12-06 18:28:49,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:28:49,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2021-12-06 18:28:49,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:28:49,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 37 [2021-12-06 18:28:49,806 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 18:28:49,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:49,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-06 18:28:49,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2021-12-06 18:28:49,955 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 18:28:49,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336677651] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:49,956 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:49,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 13 [2021-12-06 18:28:49,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11698097] [2021-12-06 18:28:49,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:49,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 18:28:49,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:49,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 18:28:49,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:28:49,960 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-06 18:28:50,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:50,243 INFO L93 Difference]: Finished difference Result 102 states and 141 transitions. [2021-12-06 18:28:50,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 18:28:50,243 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 37 [2021-12-06 18:28:50,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:50,246 INFO L225 Difference]: With dead ends: 102 [2021-12-06 18:28:50,246 INFO L226 Difference]: Without dead ends: 100 [2021-12-06 18:28:50,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 74 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-12-06 18:28:50,248 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 96 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:50,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 313 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:28:50,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-06 18:28:50,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 48. [2021-12-06 18:28:50,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 18:28:50,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2021-12-06 18:28:50,264 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 37 [2021-12-06 18:28:50,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:50,265 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2021-12-06 18:28:50,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-06 18:28:50,265 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2021-12-06 18:28:50,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 18:28:50,267 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:50,267 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:50,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 18:28:50,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:50,469 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:28:50,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:50,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1858039514, now seen corresponding path program 1 times [2021-12-06 18:28:50,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:50,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25151448] [2021-12-06 18:28:50,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:50,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:50,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:50,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:28:50,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:50,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:28:50,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:50,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:28:50,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:50,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:28:50,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:50,732 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 18:28:50,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:50,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25151448] [2021-12-06 18:28:50,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25151448] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:50,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336498161] [2021-12-06 18:28:50,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:50,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:50,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:50,734 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:50,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 18:28:50,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:50,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-06 18:28:50,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:50,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 18:28:50,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:28:50,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 18:28:50,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:28:50,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 18:28:51,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:28:51,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:28:51,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:28:51,125 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 18:28:51,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:52,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-06 18:28:52,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2021-12-06 18:28:52,364 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 18:28:52,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336498161] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:52,364 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:52,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 19 [2021-12-06 18:28:52,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090664967] [2021-12-06 18:28:52,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:52,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 18:28:52,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:52,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 18:28:52,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-12-06 18:28:52,366 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-06 18:28:53,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:53,027 INFO L93 Difference]: Finished difference Result 172 states and 236 transitions. [2021-12-06 18:28:53,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-06 18:28:53,028 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 37 [2021-12-06 18:28:53,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:53,031 INFO L225 Difference]: With dead ends: 172 [2021-12-06 18:28:53,032 INFO L226 Difference]: Without dead ends: 170 [2021-12-06 18:28:53,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 65 SyntacticMatches, 10 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=334, Invalid=1558, Unknown=0, NotChecked=0, Total=1892 [2021-12-06 18:28:53,034 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 187 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:53,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 501 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 545 Invalid, 0 Unknown, 87 Unchecked, 0.3s Time] [2021-12-06 18:28:53,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-12-06 18:28:53,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 75. [2021-12-06 18:28:53,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 57 states have internal predecessors, (75), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-06 18:28:53,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 107 transitions. [2021-12-06 18:28:53,058 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 107 transitions. Word has length 37 [2021-12-06 18:28:53,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:53,058 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 107 transitions. [2021-12-06 18:28:53,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-06 18:28:53,059 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 107 transitions. [2021-12-06 18:28:53,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 18:28:53,060 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:53,061 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:53,080 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 18:28:53,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:53,262 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:28:53,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:53,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1526874982, now seen corresponding path program 1 times [2021-12-06 18:28:53,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:53,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913370450] [2021-12-06 18:28:53,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:53,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:53,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:53,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:28:53,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:53,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:28:53,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:53,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:28:53,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:53,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:28:53,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:53,390 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 18:28:53,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:53,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913370450] [2021-12-06 18:28:53,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913370450] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:53,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918919265] [2021-12-06 18:28:53,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:53,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:53,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:53,391 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:53,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 18:28:53,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:53,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 18:28:53,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:53,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 18:28:53,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:28:53,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2021-12-06 18:28:53,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:28:53,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-06 18:28:53,548 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 18:28:53,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:53,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 18:28:53,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-06 18:28:53,642 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 18:28:53,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918919265] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:53,643 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:53,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 14 [2021-12-06 18:28:53,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332774176] [2021-12-06 18:28:53,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:53,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 18:28:53,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:53,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 18:28:53,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:28:53,644 INFO L87 Difference]: Start difference. First operand 75 states and 107 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-06 18:28:53,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:53,940 INFO L93 Difference]: Finished difference Result 262 states and 392 transitions. [2021-12-06 18:28:53,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 18:28:53,940 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 41 [2021-12-06 18:28:53,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:53,943 INFO L225 Difference]: With dead ends: 262 [2021-12-06 18:28:53,944 INFO L226 Difference]: Without dead ends: 260 [2021-12-06 18:28:53,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 82 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2021-12-06 18:28:53,945 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 113 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:53,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 354 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:28:53,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-12-06 18:28:53,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 125. [2021-12-06 18:28:53,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 94 states have (on average 1.372340425531915) internal successors, (129), 95 states have internal predecessors, (129), 28 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2021-12-06 18:28:53,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 185 transitions. [2021-12-06 18:28:53,974 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 185 transitions. Word has length 41 [2021-12-06 18:28:53,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:53,975 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 185 transitions. [2021-12-06 18:28:53,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-06 18:28:53,975 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 185 transitions. [2021-12-06 18:28:53,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 18:28:53,977 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:53,978 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:54,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 18:28:54,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:54,178 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:28:54,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:54,179 INFO L85 PathProgramCache]: Analyzing trace with hash 962653980, now seen corresponding path program 1 times [2021-12-06 18:28:54,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:54,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333644124] [2021-12-06 18:28:54,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:54,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:54,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:54,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:28:54,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:54,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:28:54,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:54,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:28:54,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:54,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:28:54,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:54,323 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 18:28:54,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:54,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333644124] [2021-12-06 18:28:54,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333644124] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:54,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215944236] [2021-12-06 18:28:54,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:54,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:54,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:54,326 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:54,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 18:28:54,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:54,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-06 18:28:54,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:54,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 18:28:54,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:28:54,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 18:28:54,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:28:54,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-06 18:28:54,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:28:54,691 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 18:28:54,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:55,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 18:28:55,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-06 18:28:55,402 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 18:28:55,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215944236] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:55,402 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:55,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2021-12-06 18:28:55,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563725233] [2021-12-06 18:28:55,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:55,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 18:28:55,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:55,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 18:28:55,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-12-06 18:28:55,404 INFO L87 Difference]: Start difference. First operand 125 states and 185 transitions. Second operand has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 21 states have internal predecessors, (72), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-06 18:28:55,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:55,869 INFO L93 Difference]: Finished difference Result 255 states and 369 transitions. [2021-12-06 18:28:55,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 18:28:55,869 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 21 states have internal predecessors, (72), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 41 [2021-12-06 18:28:55,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:55,871 INFO L225 Difference]: With dead ends: 255 [2021-12-06 18:28:55,871 INFO L226 Difference]: Without dead ends: 253 [2021-12-06 18:28:55,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 73 SyntacticMatches, 11 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=245, Invalid=1087, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 18:28:55,873 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 151 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:55,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 537 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 399 Invalid, 0 Unknown, 44 Unchecked, 0.2s Time] [2021-12-06 18:28:55,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-12-06 18:28:55,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 147. [2021-12-06 18:28:55,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 110 states have (on average 1.3818181818181818) internal successors, (152), 111 states have internal predecessors, (152), 33 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-06 18:28:55,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 218 transitions. [2021-12-06 18:28:55,899 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 218 transitions. Word has length 41 [2021-12-06 18:28:55,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:55,900 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 218 transitions. [2021-12-06 18:28:55,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 21 states have internal predecessors, (72), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-06 18:28:55,900 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 218 transitions. [2021-12-06 18:28:55,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 18:28:55,903 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:55,903 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:55,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-06 18:28:56,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:56,105 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:28:56,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:56,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1663718558, now seen corresponding path program 1 times [2021-12-06 18:28:56,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:56,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863478372] [2021-12-06 18:28:56,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:56,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:56,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:56,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:28:56,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:56,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:28:56,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:56,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:28:56,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:56,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:28:56,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:56,279 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 18:28:56,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:56,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863478372] [2021-12-06 18:28:56,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863478372] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:56,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649054212] [2021-12-06 18:28:56,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:56,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:56,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:56,280 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:56,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 18:28:56,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:56,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-06 18:28:56,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:56,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 18:28:56,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:28:56,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 18:28:56,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:28:56,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-06 18:28:56,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:28:56,590 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 18:28:56,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:57,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 18:28:57,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-06 18:28:57,293 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 18:28:57,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649054212] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:57,293 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:57,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2021-12-06 18:28:57,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006649326] [2021-12-06 18:28:57,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:57,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 18:28:57,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:57,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 18:28:57,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-12-06 18:28:57,295 INFO L87 Difference]: Start difference. First operand 147 states and 218 transitions. Second operand has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 21 states have internal predecessors, (72), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-06 18:28:57,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:57,927 INFO L93 Difference]: Finished difference Result 386 states and 561 transitions. [2021-12-06 18:28:57,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 18:28:57,927 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 21 states have internal predecessors, (72), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 41 [2021-12-06 18:28:57,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:57,930 INFO L225 Difference]: With dead ends: 386 [2021-12-06 18:28:57,930 INFO L226 Difference]: Without dead ends: 384 [2021-12-06 18:28:57,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 73 SyntacticMatches, 8 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=340, Invalid=1640, Unknown=0, NotChecked=0, Total=1980 [2021-12-06 18:28:57,931 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 183 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:57,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 584 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 688 Invalid, 0 Unknown, 72 Unchecked, 0.3s Time] [2021-12-06 18:28:57,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-12-06 18:28:57,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 186. [2021-12-06 18:28:57,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 134 states have (on average 1.3955223880597014) internal successors, (187), 139 states have internal predecessors, (187), 47 states have call successors, (47), 4 states have call predecessors, (47), 4 states have return successors, (47), 42 states have call predecessors, (47), 47 states have call successors, (47) [2021-12-06 18:28:57,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 281 transitions. [2021-12-06 18:28:57,952 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 281 transitions. Word has length 41 [2021-12-06 18:28:57,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:57,952 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 281 transitions. [2021-12-06 18:28:57,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 21 states have internal predecessors, (72), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-06 18:28:57,952 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 281 transitions. [2021-12-06 18:28:57,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 18:28:57,954 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:57,954 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:57,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 18:28:58,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-06 18:28:58,155 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:28:58,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:58,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1227872016, now seen corresponding path program 2 times [2021-12-06 18:28:58,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:58,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230315688] [2021-12-06 18:28:58,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:58,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:58,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:58,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:28:58,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:58,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:28:58,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:58,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:28:58,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:58,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:28:58,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:58,256 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 18:28:58,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:58,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230315688] [2021-12-06 18:28:58,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230315688] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:58,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062770764] [2021-12-06 18:28:58,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:28:58,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:58,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:58,257 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:58,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 18:28:58,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:28:58,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:28:58,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 18:28:58,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:58,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 18:28:58,351 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 18:28:58,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-12-06 18:28:58,394 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 18:28:58,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:58,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 18:28:58,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-06 18:28:58,468 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 18:28:58,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062770764] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:58,469 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:58,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2021-12-06 18:28:58,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94291648] [2021-12-06 18:28:58,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:58,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 18:28:58,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:58,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 18:28:58,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-06 18:28:58,470 INFO L87 Difference]: Start difference. First operand 186 states and 281 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-06 18:28:59,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:59,068 INFO L93 Difference]: Finished difference Result 1231 states and 1939 transitions. [2021-12-06 18:28:59,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 18:28:59,068 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 45 [2021-12-06 18:28:59,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:59,075 INFO L225 Difference]: With dead ends: 1231 [2021-12-06 18:28:59,079 INFO L226 Difference]: Without dead ends: 1229 [2021-12-06 18:28:59,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2021-12-06 18:28:59,081 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 86 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:59,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 496 Invalid, 998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 18:28:59,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2021-12-06 18:28:59,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 405. [2021-12-06 18:28:59,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 296 states have (on average 1.4324324324324325) internal successors, (424), 298 states have internal predecessors, (424), 104 states have call successors, (104), 4 states have call predecessors, (104), 4 states have return successors, (104), 102 states have call predecessors, (104), 104 states have call successors, (104) [2021-12-06 18:28:59,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 632 transitions. [2021-12-06 18:28:59,127 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 632 transitions. Word has length 45 [2021-12-06 18:28:59,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:59,127 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 632 transitions. [2021-12-06 18:28:59,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-06 18:28:59,128 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 632 transitions. [2021-12-06 18:28:59,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 18:28:59,129 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:59,129 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:59,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 18:28:59,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:59,330 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:28:59,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:59,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1650573842, now seen corresponding path program 1 times [2021-12-06 18:28:59,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:59,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081849433] [2021-12-06 18:28:59,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:59,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:59,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:59,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:28:59,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:59,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:28:59,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:59,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:28:59,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:59,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:28:59,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:59,450 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 18:28:59,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:59,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081849433] [2021-12-06 18:28:59,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081849433] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:59,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966968494] [2021-12-06 18:28:59,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:59,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:59,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:59,451 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:59,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 18:28:59,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:59,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 18:28:59,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:59,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 18:28:59,622 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 18:28:59,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-06 18:28:59,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-06 18:28:59,731 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 18:28:59,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:59,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 18:28:59,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-06 18:28:59,891 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 18:28:59,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966968494] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:59,891 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:59,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2021-12-06 18:28:59,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342282698] [2021-12-06 18:28:59,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:59,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 18:28:59,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:59,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 18:28:59,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-12-06 18:28:59,892 INFO L87 Difference]: Start difference. First operand 405 states and 632 transitions. Second operand has 24 states, 24 states have (on average 3.5) internal successors, (84), 24 states have internal predecessors, (84), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-06 18:29:02,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:29:02,842 INFO L93 Difference]: Finished difference Result 1422 states and 2203 transitions. [2021-12-06 18:29:02,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-06 18:29:02,843 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.5) internal successors, (84), 24 states have internal predecessors, (84), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 45 [2021-12-06 18:29:02,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:29:02,850 INFO L225 Difference]: With dead ends: 1422 [2021-12-06 18:29:02,850 INFO L226 Difference]: Without dead ends: 1420 [2021-12-06 18:29:02,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 81 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=503, Invalid=2688, Unknown=1, NotChecked=0, Total=3192 [2021-12-06 18:29:02,853 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 306 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 1014 mSolverCounterSat, 440 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 1588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 440 IncrementalHoareTripleChecker+Valid, 1014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:29:02,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 706 Invalid, 1588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [440 Valid, 1014 Invalid, 0 Unknown, 134 Unchecked, 0.5s Time] [2021-12-06 18:29:02,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1420 states. [2021-12-06 18:29:02,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1420 to 535. [2021-12-06 18:29:02,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 388 states have (on average 1.4458762886597938) internal successors, (561), 391 states have internal predecessors, (561), 141 states have call successors, (141), 5 states have call predecessors, (141), 5 states have return successors, (141), 138 states have call predecessors, (141), 141 states have call successors, (141) [2021-12-06 18:29:02,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 843 transitions. [2021-12-06 18:29:02,911 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 843 transitions. Word has length 45 [2021-12-06 18:29:02,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:29:02,911 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 843 transitions. [2021-12-06 18:29:02,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.5) internal successors, (84), 24 states have internal predecessors, (84), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-06 18:29:02,911 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 843 transitions. [2021-12-06 18:29:02,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-06 18:29:02,912 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:29:02,912 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:29:02,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-06 18:29:03,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:29:03,114 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:29:03,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:29:03,116 INFO L85 PathProgramCache]: Analyzing trace with hash -112998778, now seen corresponding path program 3 times [2021-12-06 18:29:03,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:29:03,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475264355] [2021-12-06 18:29:03,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:29:03,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:29:03,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:03,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:29:03,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:03,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:29:03,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:03,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:29:03,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:03,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:29:03,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:03,273 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 18:29:03,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:29:03,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475264355] [2021-12-06 18:29:03,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475264355] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:29:03,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17889292] [2021-12-06 18:29:03,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:29:03,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:29:03,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:29:03,275 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:29:03,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 18:29:03,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 18:29:03,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:29:03,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 18:29:03,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:29:03,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:29:03,424 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 18:29:03,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:29:03,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 18:29:03,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-06 18:29:03,516 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 18:29:03,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17889292] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:29:03,516 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:29:03,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2021-12-06 18:29:03,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799895575] [2021-12-06 18:29:03,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:29:03,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 18:29:03,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:29:03,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 18:29:03,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-12-06 18:29:03,518 INFO L87 Difference]: Start difference. First operand 535 states and 843 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 18:29:05,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:29:05,033 INFO L93 Difference]: Finished difference Result 3544 states and 5629 transitions. [2021-12-06 18:29:05,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-06 18:29:05,033 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 49 [2021-12-06 18:29:05,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:29:05,057 INFO L225 Difference]: With dead ends: 3544 [2021-12-06 18:29:05,057 INFO L226 Difference]: Without dead ends: 3542 [2021-12-06 18:29:05,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 93 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=522, Invalid=2558, Unknown=0, NotChecked=0, Total=3080 [2021-12-06 18:29:05,062 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 239 mSDsluCounter, 826 mSDsCounter, 0 mSdLazyCounter, 1800 mSolverCounterSat, 502 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 988 SdHoareTripleChecker+Invalid, 2302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 502 IncrementalHoareTripleChecker+Valid, 1800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 18:29:05,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 988 Invalid, 2302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [502 Valid, 1800 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 18:29:05,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3542 states. [2021-12-06 18:29:05,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3542 to 1417. [2021-12-06 18:29:05,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1417 states, 1024 states have (on average 1.4677734375) internal successors, (1503), 1024 states have internal predecessors, (1503), 387 states have call successors, (387), 5 states have call predecessors, (387), 5 states have return successors, (387), 387 states have call predecessors, (387), 387 states have call successors, (387) [2021-12-06 18:29:05,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1417 states to 1417 states and 2277 transitions. [2021-12-06 18:29:05,232 INFO L78 Accepts]: Start accepts. Automaton has 1417 states and 2277 transitions. Word has length 49 [2021-12-06 18:29:05,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:29:05,232 INFO L470 AbstractCegarLoop]: Abstraction has 1417 states and 2277 transitions. [2021-12-06 18:29:05,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 18:29:05,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1417 states and 2277 transitions. [2021-12-06 18:29:05,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-06 18:29:05,234 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:29:05,234 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:29:05,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 18:29:05,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-06 18:29:05,435 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:29:05,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:29:05,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1801942520, now seen corresponding path program 1 times [2021-12-06 18:29:05,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:29:05,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269550449] [2021-12-06 18:29:05,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:29:05,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:29:05,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:05,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:29:05,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:05,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:29:05,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:05,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:29:05,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:05,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:29:05,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:05,583 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 18:29:05,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:29:05,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269550449] [2021-12-06 18:29:05,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269550449] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:29:05,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463543866] [2021-12-06 18:29:05,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:29:05,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:29:05,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:29:05,585 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:29:05,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 18:29:05,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:05,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 18:29:05,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:29:05,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:29:05,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-06 18:29:05,824 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 18:29:05,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:29:05,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 18:29:05,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-06 18:29:05,969 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 18:29:05,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463543866] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:29:05,969 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:29:05,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2021-12-06 18:29:05,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082297128] [2021-12-06 18:29:05,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:29:05,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 18:29:05,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:29:05,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 18:29:05,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-12-06 18:29:05,971 INFO L87 Difference]: Start difference. First operand 1417 states and 2277 transitions. Second operand has 25 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 3 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-06 18:29:09,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:29:09,334 INFO L93 Difference]: Finished difference Result 4997 states and 7943 transitions. [2021-12-06 18:29:09,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-12-06 18:29:09,335 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 3 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 49 [2021-12-06 18:29:09,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:29:09,357 INFO L225 Difference]: With dead ends: 4997 [2021-12-06 18:29:09,357 INFO L226 Difference]: Without dead ends: 4995 [2021-12-06 18:29:09,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2753 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1313, Invalid=7807, Unknown=0, NotChecked=0, Total=9120 [2021-12-06 18:29:09,365 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 682 mSDsluCounter, 1042 mSDsCounter, 0 mSdLazyCounter, 3026 mSolverCounterSat, 1521 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 1257 SdHoareTripleChecker+Invalid, 4547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1521 IncrementalHoareTripleChecker+Valid, 3026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:29:09,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [682 Valid, 1257 Invalid, 4547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1521 Valid, 3026 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-06 18:29:09,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4995 states. [2021-12-06 18:29:09,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4995 to 559. [2021-12-06 18:29:09,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 412 states have (on average 1.4296116504854368) internal successors, (589), 415 states have internal predecessors, (589), 141 states have call successors, (141), 5 states have call predecessors, (141), 5 states have return successors, (141), 138 states have call predecessors, (141), 141 states have call successors, (141) [2021-12-06 18:29:09,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 871 transitions. [2021-12-06 18:29:09,495 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 871 transitions. Word has length 49 [2021-12-06 18:29:09,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:29:09,495 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 871 transitions. [2021-12-06 18:29:09,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 3 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-06 18:29:09,495 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 871 transitions. [2021-12-06 18:29:09,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-06 18:29:09,496 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:29:09,497 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:29:09,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 18:29:09,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:29:09,697 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:29:09,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:29:09,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1773729028, now seen corresponding path program 4 times [2021-12-06 18:29:09,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:29:09,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824729400] [2021-12-06 18:29:09,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:29:09,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:29:09,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:09,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:29:09,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:09,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:29:09,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:09,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:29:09,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:09,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:29:09,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:09,908 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 14 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 18:29:09,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:29:09,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824729400] [2021-12-06 18:29:09,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824729400] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:29:09,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040825688] [2021-12-06 18:29:09,909 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:29:09,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:29:09,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:29:09,910 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:29:09,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 18:29:09,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:29:09,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:29:09,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 18:29:09,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:29:10,233 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 18:29:10,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:29:10,390 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 18:29:10,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040825688] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:29:10,390 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:29:10,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 31 [2021-12-06 18:29:10,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834191964] [2021-12-06 18:29:10,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:29:10,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-06 18:29:10,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:29:10,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-06 18:29:10,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=692, Unknown=0, NotChecked=0, Total=930 [2021-12-06 18:29:10,392 INFO L87 Difference]: Start difference. First operand 559 states and 871 transitions. Second operand has 31 states, 31 states have (on average 3.4516129032258065) internal successors, (107), 31 states have internal predecessors, (107), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-06 18:29:10,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:29:10,688 INFO L93 Difference]: Finished difference Result 733 states and 1126 transitions. [2021-12-06 18:29:10,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 18:29:10,689 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.4516129032258065) internal successors, (107), 31 states have internal predecessors, (107), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 53 [2021-12-06 18:29:10,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:29:10,692 INFO L225 Difference]: With dead ends: 733 [2021-12-06 18:29:10,693 INFO L226 Difference]: Without dead ends: 709 [2021-12-06 18:29:10,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=333, Invalid=927, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 18:29:10,694 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 310 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:29:10,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 133 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:29:10,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2021-12-06 18:29:10,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 576. [2021-12-06 18:29:10,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 428 states have (on average 1.4135514018691588) internal successors, (605), 428 states have internal predecessors, (605), 142 states have call successors, (142), 5 states have call predecessors, (142), 5 states have return successors, (142), 142 states have call predecessors, (142), 142 states have call successors, (142) [2021-12-06 18:29:10,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 889 transitions. [2021-12-06 18:29:10,766 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 889 transitions. Word has length 53 [2021-12-06 18:29:10,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:29:10,767 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 889 transitions. [2021-12-06 18:29:10,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.4516129032258065) internal successors, (107), 31 states have internal predecessors, (107), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-06 18:29:10,767 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 889 transitions. [2021-12-06 18:29:10,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-06 18:29:10,768 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:29:10,768 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:29:10,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-06 18:29:10,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:29:10,969 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:29:10,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:29:10,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1645650707, now seen corresponding path program 2 times [2021-12-06 18:29:10,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:29:10,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462484077] [2021-12-06 18:29:10,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:29:10,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:29:11,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:11,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:29:11,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:11,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:29:11,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:11,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:29:11,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:11,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:29:11,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:11,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 18:29:11,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:11,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:29:11,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:11,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:29:11,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:11,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 18:29:11,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:11,155 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 18:29:11,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:29:11,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462484077] [2021-12-06 18:29:11,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462484077] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:29:11,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372581181] [2021-12-06 18:29:11,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:29:11,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:29:11,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:29:11,157 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:29:11,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 18:29:11,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:29:11,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:29:11,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-06 18:29:11,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:29:11,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 18:29:11,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:11,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 18:29:11,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:11,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 18:29:11,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:11,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 18:29:11,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:11,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-06 18:29:11,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:11,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-06 18:29:11,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:11,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-06 18:29:11,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:11,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-06 18:29:11,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:29:11,689 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-06 18:29:11,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:29:13,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372581181] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:29:13,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:29:13,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-12-06 18:29:13,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45660908] [2021-12-06 18:29:13,598 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:29:13,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 18:29:13,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:29:13,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 18:29:13,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=311, Unknown=1, NotChecked=0, Total=380 [2021-12-06 18:29:13,599 INFO L87 Difference]: Start difference. First operand 576 states and 889 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-12-06 18:29:14,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:29:14,038 INFO L93 Difference]: Finished difference Result 683 states and 1019 transitions. [2021-12-06 18:29:14,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 18:29:14,039 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 63 [2021-12-06 18:29:14,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:29:14,042 INFO L225 Difference]: With dead ends: 683 [2021-12-06 18:29:14,042 INFO L226 Difference]: Without dead ends: 681 [2021-12-06 18:29:14,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 85 SyntacticMatches, 17 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=205, Invalid=916, Unknown=1, NotChecked=0, Total=1122 [2021-12-06 18:29:14,044 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 96 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:29:14,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 500 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 596 Invalid, 0 Unknown, 52 Unchecked, 0.3s Time] [2021-12-06 18:29:14,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-12-06 18:29:14,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 435. [2021-12-06 18:29:14,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 324 states have (on average 1.3796296296296295) internal successors, (447), 324 states have internal predecessors, (447), 101 states have call successors, (101), 9 states have call predecessors, (101), 9 states have return successors, (101), 101 states have call predecessors, (101), 101 states have call successors, (101) [2021-12-06 18:29:14,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 649 transitions. [2021-12-06 18:29:14,111 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 649 transitions. Word has length 63 [2021-12-06 18:29:14,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:29:14,111 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 649 transitions. [2021-12-06 18:29:14,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-12-06 18:29:14,111 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 649 transitions. [2021-12-06 18:29:14,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-06 18:29:14,112 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:29:14,112 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:29:14,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 18:29:14,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:29:14,314 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:29:14,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:29:14,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1480379401, now seen corresponding path program 2 times [2021-12-06 18:29:14,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:29:14,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770559811] [2021-12-06 18:29:14,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:29:14,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:29:14,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:14,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:29:14,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:14,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:29:14,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:14,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:29:14,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:14,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:29:14,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:14,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 18:29:14,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:14,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:29:14,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:14,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:29:14,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:14,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 18:29:14,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:14,515 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 18:29:14,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:29:14,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770559811] [2021-12-06 18:29:14,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770559811] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:29:14,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567769157] [2021-12-06 18:29:14,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:29:14,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:29:14,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:29:14,516 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:29:14,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 18:29:14,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:29:14,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:29:14,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-06 18:29:14,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:29:14,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 18:29:14,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:14,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 18:29:14,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:14,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 18:29:14,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:14,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 18:29:14,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:14,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 18:29:14,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:14,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 18:29:14,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:14,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 18:29:15,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:29:15,031 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 36 proven. 18 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-06 18:29:15,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:29:16,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567769157] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:29:16,378 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:29:16,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-06 18:29:16,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808413210] [2021-12-06 18:29:16,379 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:29:16,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 18:29:16,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:29:16,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 18:29:16,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=390, Unknown=1, NotChecked=0, Total=462 [2021-12-06 18:29:16,380 INFO L87 Difference]: Start difference. First operand 435 states and 649 transitions. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-12-06 18:29:17,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:29:17,111 INFO L93 Difference]: Finished difference Result 957 states and 1428 transitions. [2021-12-06 18:29:17,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-06 18:29:17,112 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 67 [2021-12-06 18:29:17,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:29:17,116 INFO L225 Difference]: With dead ends: 957 [2021-12-06 18:29:17,116 INFO L226 Difference]: Without dead ends: 955 [2021-12-06 18:29:17,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 90 SyntacticMatches, 15 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=341, Invalid=1820, Unknown=1, NotChecked=0, Total=2162 [2021-12-06 18:29:17,118 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 184 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:29:17,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 498 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 591 Invalid, 0 Unknown, 91 Unchecked, 0.3s Time] [2021-12-06 18:29:17,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-12-06 18:29:17,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 519. [2021-12-06 18:29:17,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 384 states have (on average 1.3932291666666667) internal successors, (535), 384 states have internal predecessors, (535), 123 states have call successors, (123), 11 states have call predecessors, (123), 11 states have return successors, (123), 123 states have call predecessors, (123), 123 states have call successors, (123) [2021-12-06 18:29:17,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 781 transitions. [2021-12-06 18:29:17,206 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 781 transitions. Word has length 67 [2021-12-06 18:29:17,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:29:17,206 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 781 transitions. [2021-12-06 18:29:17,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-12-06 18:29:17,206 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 781 transitions. [2021-12-06 18:29:17,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-06 18:29:17,208 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:29:17,208 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:29:17,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-06 18:29:17,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 18:29:17,408 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:29:17,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:29:17,409 INFO L85 PathProgramCache]: Analyzing trace with hash 949660519, now seen corresponding path program 5 times [2021-12-06 18:29:17,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:29:17,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326101820] [2021-12-06 18:29:17,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:29:17,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:29:17,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:17,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:29:17,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:17,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:29:17,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:17,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:29:17,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:17,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:29:17,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:17,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 18:29:17,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:17,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:29:17,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:17,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:29:17,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:17,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 18:29:17,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:17,555 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 18:29:17,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:29:17,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326101820] [2021-12-06 18:29:17,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326101820] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:29:17,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270175892] [2021-12-06 18:29:17,555 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:29:17,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:29:17,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:29:17,556 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:29:17,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 18:29:17,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-06 18:29:17,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:29:17,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-06 18:29:17,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:29:17,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 18:29:17,738 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 18:29:17,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-06 18:29:17,762 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 18:29:17,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-06 18:29:17,783 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 18:29:17,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-06 18:29:17,883 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-06 18:29:17,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2021-12-06 18:29:17,894 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 18:29:17,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:29:17,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 18:29:17,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-06 18:29:18,024 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 18:29:18,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270175892] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:29:18,024 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:29:18,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 17 [2021-12-06 18:29:18,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644403405] [2021-12-06 18:29:18,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:29:18,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 18:29:18,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:29:18,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 18:29:18,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-12-06 18:29:18,026 INFO L87 Difference]: Start difference. First operand 519 states and 781 transitions. Second operand has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 4 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-06 18:29:21,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:29:21,867 INFO L93 Difference]: Finished difference Result 8456 states and 13553 transitions. [2021-12-06 18:29:21,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-12-06 18:29:21,868 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 4 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 79 [2021-12-06 18:29:21,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:29:21,907 INFO L225 Difference]: With dead ends: 8456 [2021-12-06 18:29:21,907 INFO L226 Difference]: Without dead ends: 8454 [2021-12-06 18:29:21,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 163 SyntacticMatches, 9 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2800 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=834, Invalid=6822, Unknown=0, NotChecked=0, Total=7656 [2021-12-06 18:29:21,911 INFO L933 BasicCegarLoop]: 337 mSDtfsCounter, 216 mSDsluCounter, 1250 mSDsCounter, 0 mSdLazyCounter, 3712 mSolverCounterSat, 666 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 1587 SdHoareTripleChecker+Invalid, 4378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 666 IncrementalHoareTripleChecker+Valid, 3712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:29:21,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 1587 Invalid, 4378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [666 Valid, 3712 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-06 18:29:21,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8454 states. [2021-12-06 18:29:22,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8454 to 1299. [2021-12-06 18:29:22,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 952 states have (on average 1.4464285714285714) internal successors, (1377), 952 states have internal predecessors, (1377), 335 states have call successors, (335), 11 states have call predecessors, (335), 11 states have return successors, (335), 335 states have call predecessors, (335), 335 states have call successors, (335) [2021-12-06 18:29:22,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 2047 transitions. [2021-12-06 18:29:22,267 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 2047 transitions. Word has length 79 [2021-12-06 18:29:22,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:29:22,267 INFO L470 AbstractCegarLoop]: Abstraction has 1299 states and 2047 transitions. [2021-12-06 18:29:22,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 4 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-06 18:29:22,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 2047 transitions. [2021-12-06 18:29:22,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-06 18:29:22,270 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:29:22,270 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:29:22,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 18:29:22,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 18:29:22,471 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:29:22,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:29:22,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1373307241, now seen corresponding path program 1 times [2021-12-06 18:29:22,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:29:22,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369169125] [2021-12-06 18:29:22,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:29:22,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:29:22,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:22,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:29:22,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:22,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:29:22,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:22,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:29:22,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:22,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:29:22,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:22,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 18:29:22,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:22,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:29:22,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:22,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:29:22,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:22,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 18:29:22,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:22,612 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 18:29:22,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:29:22,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369169125] [2021-12-06 18:29:22,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369169125] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:29:22,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063322715] [2021-12-06 18:29:22,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:29:22,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:29:22,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:29:22,613 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:29:22,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 18:29:22,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:22,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-06 18:29:22,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:29:22,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 18:29:22,841 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 18:29:22,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 18:29:22,884 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 18:29:22,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 18:29:22,933 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 18:29:22,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-06 18:29:23,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-06 18:29:23,098 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 45 proven. 48 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-06 18:29:23,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:29:24,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 18:29:24,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-06 18:29:24,669 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 18:29:24,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063322715] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:29:24,669 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:29:24,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 33 [2021-12-06 18:29:24,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610241420] [2021-12-06 18:29:24,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:29:24,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 18:29:24,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:29:24,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 18:29:24,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 18:29:24,670 INFO L87 Difference]: Start difference. First operand 1299 states and 2047 transitions. Second operand has 33 states, 33 states have (on average 4.181818181818182) internal successors, (138), 33 states have internal predecessors, (138), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-06 18:30:19,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:30:19,566 INFO L93 Difference]: Finished difference Result 9013 states and 14425 transitions. [2021-12-06 18:30:19,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-12-06 18:30:19,567 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.181818181818182) internal successors, (138), 33 states have internal predecessors, (138), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) Word has length 79 [2021-12-06 18:30:19,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:30:19,588 INFO L225 Difference]: With dead ends: 9013 [2021-12-06 18:30:19,588 INFO L226 Difference]: Without dead ends: 9011 [2021-12-06 18:30:19,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 147 SyntacticMatches, 11 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5910 ImplicationChecksByTransitivity, 52.4s TimeCoverageRelationStatistics Valid=1949, Invalid=13775, Unknown=26, NotChecked=0, Total=15750 [2021-12-06 18:30:19,594 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 598 mSDsluCounter, 2020 mSDsCounter, 0 mSdLazyCounter, 4446 mSolverCounterSat, 1534 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 2281 SdHoareTripleChecker+Invalid, 6323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1534 IncrementalHoareTripleChecker+Valid, 4446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 343 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:30:19,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [611 Valid, 2281 Invalid, 6323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1534 Valid, 4446 Invalid, 0 Unknown, 343 Unchecked, 2.5s Time] [2021-12-06 18:30:19,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9011 states. [2021-12-06 18:30:20,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9011 to 1647. [2021-12-06 18:30:20,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1647 states, 1200 states have (on average 1.4541666666666666) internal successors, (1745), 1200 states have internal predecessors, (1745), 431 states have call successors, (431), 15 states have call predecessors, (431), 15 states have return successors, (431), 431 states have call predecessors, (431), 431 states have call successors, (431) [2021-12-06 18:30:20,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1647 states to 1647 states and 2607 transitions. [2021-12-06 18:30:20,027 INFO L78 Accepts]: Start accepts. Automaton has 1647 states and 2607 transitions. Word has length 79 [2021-12-06 18:30:20,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:30:20,027 INFO L470 AbstractCegarLoop]: Abstraction has 1647 states and 2607 transitions. [2021-12-06 18:30:20,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.181818181818182) internal successors, (138), 33 states have internal predecessors, (138), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-06 18:30:20,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1647 states and 2607 transitions. [2021-12-06 18:30:20,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-06 18:30:20,030 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:30:20,030 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:30:20,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 18:30:20,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 18:30:20,231 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:30:20,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:30:20,231 INFO L85 PathProgramCache]: Analyzing trace with hash -739338403, now seen corresponding path program 6 times [2021-12-06 18:30:20,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:30:20,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089638430] [2021-12-06 18:30:20,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:30:20,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:30:20,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:20,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:30:20,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:20,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:30:20,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:20,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:30:20,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:20,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:30:20,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:20,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 18:30:20,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:20,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:30:20,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:20,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:30:20,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:20,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 18:30:20,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:20,350 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 18:30:20,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:30:20,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089638430] [2021-12-06 18:30:20,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089638430] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:30:20,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354689109] [2021-12-06 18:30:20,351 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:30:20,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:30:20,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:30:20,352 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:30:20,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 18:30:20,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-06 18:30:20,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:30:20,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-06 18:30:20,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:30:20,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 18:30:20,504 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 18:30:20,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-06 18:30:20,524 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 18:30:20,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-06 18:30:20,651 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-06 18:30:20,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2021-12-06 18:30:20,664 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 18:30:20,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:30:20,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 18:30:20,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-06 18:30:20,792 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 18:30:20,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354689109] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:30:20,792 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:30:20,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 19 [2021-12-06 18:30:20,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015321228] [2021-12-06 18:30:20,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:30:20,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 18:30:20,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:30:20,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 18:30:20,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-12-06 18:30:20,794 INFO L87 Difference]: Start difference. First operand 1647 states and 2607 transitions. Second operand has 19 states, 19 states have (on average 4.473684210526316) internal successors, (85), 19 states have internal predecessors, (85), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-06 18:30:32,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:30:32,863 INFO L93 Difference]: Finished difference Result 31108 states and 50233 transitions. [2021-12-06 18:30:32,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2021-12-06 18:30:32,864 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.473684210526316) internal successors, (85), 19 states have internal predecessors, (85), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 83 [2021-12-06 18:30:32,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:30:32,929 INFO L225 Difference]: With dead ends: 31108 [2021-12-06 18:30:32,929 INFO L226 Difference]: Without dead ends: 31106 [2021-12-06 18:30:32,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 170 SyntacticMatches, 8 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16086 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2956, Invalid=34874, Unknown=0, NotChecked=0, Total=37830 [2021-12-06 18:30:32,941 INFO L933 BasicCegarLoop]: 663 mSDtfsCounter, 405 mSDsluCounter, 2790 mSDsCounter, 0 mSdLazyCounter, 7593 mSolverCounterSat, 1777 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 3453 SdHoareTripleChecker+Invalid, 9370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1777 IncrementalHoareTripleChecker+Valid, 7593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:30:32,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 3453 Invalid, 9370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1777 Valid, 7593 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-12-06 18:30:32,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31106 states. [2021-12-06 18:30:34,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31106 to 4381. [2021-12-06 18:30:34,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4381 states, 3170 states have (on average 1.4750788643533124) internal successors, (4676), 3170 states have internal predecessors, (4676), 1195 states have call successors, (1195), 15 states have call predecessors, (1195), 15 states have return successors, (1195), 1195 states have call predecessors, (1195), 1195 states have call successors, (1195) [2021-12-06 18:30:34,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4381 states to 4381 states and 7066 transitions. [2021-12-06 18:30:34,347 INFO L78 Accepts]: Start accepts. Automaton has 4381 states and 7066 transitions. Word has length 83 [2021-12-06 18:30:34,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:30:34,347 INFO L470 AbstractCegarLoop]: Abstraction has 4381 states and 7066 transitions. [2021-12-06 18:30:34,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.473684210526316) internal successors, (85), 19 states have internal predecessors, (85), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-06 18:30:34,347 INFO L276 IsEmpty]: Start isEmpty. Operand 4381 states and 7066 transitions. [2021-12-06 18:30:34,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-06 18:30:34,352 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:30:34,352 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:30:34,373 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 18:30:34,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 18:30:34,553 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:30:34,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:30:34,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1710261727, now seen corresponding path program 1 times [2021-12-06 18:30:34,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:30:34,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837551529] [2021-12-06 18:30:34,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:30:34,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:30:34,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:34,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:30:34,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:34,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:30:34,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:34,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:30:34,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:34,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:30:34,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:34,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 18:30:34,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:34,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:30:34,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:34,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:30:34,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:34,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 18:30:34,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:34,745 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 18:30:34,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:30:34,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837551529] [2021-12-06 18:30:34,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837551529] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:30:34,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582590082] [2021-12-06 18:30:34,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:30:34,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:30:34,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:30:34,747 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:30:34,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 18:30:34,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:34,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-06 18:30:34,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:30:34,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 18:30:35,015 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 18:30:35,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 18:30:35,069 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 18:30:35,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-06 18:30:35,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-06 18:30:35,280 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 36 proven. 66 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-06 18:30:35,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:30:36,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 18:30:36,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-06 18:30:36,244 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 18:30:36,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582590082] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:30:36,244 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:30:36,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 36 [2021-12-06 18:30:36,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113694224] [2021-12-06 18:30:36,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:30:36,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-06 18:30:36,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:30:36,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-06 18:30:36,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1130, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 18:30:36,246 INFO L87 Difference]: Start difference. First operand 4381 states and 7066 transitions. Second operand has 36 states, 36 states have (on average 4.166666666666667) internal successors, (150), 36 states have internal predecessors, (150), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-06 18:32:45,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:32:45,505 INFO L93 Difference]: Finished difference Result 21956 states and 35383 transitions. [2021-12-06 18:32:45,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2021-12-06 18:32:45,506 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.166666666666667) internal successors, (150), 36 states have internal predecessors, (150), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) Word has length 83 [2021-12-06 18:32:45,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:32:45,543 INFO L225 Difference]: With dead ends: 21956 [2021-12-06 18:32:45,543 INFO L226 Difference]: Without dead ends: 21954 [2021-12-06 18:32:45,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 159 SyntacticMatches, 7 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13383 ImplicationChecksByTransitivity, 121.9s TimeCoverageRelationStatistics Valid=4384, Invalid=29597, Unknown=59, NotChecked=0, Total=34040 [2021-12-06 18:32:45,551 INFO L933 BasicCegarLoop]: 363 mSDtfsCounter, 1022 mSDsluCounter, 2029 mSDsCounter, 0 mSdLazyCounter, 5936 mSolverCounterSat, 2935 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1039 SdHoareTripleChecker+Valid, 2392 SdHoareTripleChecker+Invalid, 9522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2935 IncrementalHoareTripleChecker+Valid, 5936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 651 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:32:45,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1039 Valid, 2392 Invalid, 9522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2935 Valid, 5936 Invalid, 0 Unknown, 651 Unchecked, 3.6s Time] [2021-12-06 18:32:45,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21954 states. [2021-12-06 18:32:47,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21954 to 5413. [2021-12-06 18:32:47,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5413 states, 3906 states have (on average 1.477726574500768) internal successors, (5772), 3906 states have internal predecessors, (5772), 1483 states have call successors, (1483), 23 states have call predecessors, (1483), 23 states have return successors, (1483), 1483 states have call predecessors, (1483), 1483 states have call successors, (1483) [2021-12-06 18:32:47,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5413 states to 5413 states and 8738 transitions. [2021-12-06 18:32:47,057 INFO L78 Accepts]: Start accepts. Automaton has 5413 states and 8738 transitions. Word has length 83 [2021-12-06 18:32:47,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:32:47,058 INFO L470 AbstractCegarLoop]: Abstraction has 5413 states and 8738 transitions. [2021-12-06 18:32:47,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.166666666666667) internal successors, (150), 36 states have internal predecessors, (150), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-06 18:32:47,058 INFO L276 IsEmpty]: Start isEmpty. Operand 5413 states and 8738 transitions. [2021-12-06 18:32:47,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-06 18:32:47,066 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:32:47,066 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:32:47,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 18:32:47,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 18:32:47,267 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:32:47,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:32:47,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1965057965, now seen corresponding path program 7 times [2021-12-06 18:32:47,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:32:47,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370440590] [2021-12-06 18:32:47,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:32:47,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:32:47,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:32:47,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:32:47,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:32:47,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:32:47,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:32:47,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:32:47,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:32:47,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:32:47,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:32:47,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 18:32:47,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:32:47,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:32:47,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:32:47,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:32:47,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:32:47,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 18:32:47,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:32:47,421 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 18:32:47,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:32:47,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370440590] [2021-12-06 18:32:47,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370440590] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:32:47,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908960267] [2021-12-06 18:32:47,422 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:32:47,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:32:47,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:32:47,422 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:32:47,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 18:32:47,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:32:47,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-06 18:32:47,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:32:47,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 18:32:47,551 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 18:32:47,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-06 18:32:47,704 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-06 18:32:47,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2021-12-06 18:32:47,717 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 18:32:47,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:32:47,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 18:32:47,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-06 18:32:47,836 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 18:32:47,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908960267] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:32:47,836 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:32:47,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 21 [2021-12-06 18:32:47,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225624460] [2021-12-06 18:32:47,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:32:47,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 18:32:47,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:32:47,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 18:32:47,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-12-06 18:32:47,838 INFO L87 Difference]: Start difference. First operand 5413 states and 8738 transitions. Second operand has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 21 states have internal predecessors, (91), 4 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-12-06 18:33:17,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:33:17,824 INFO L93 Difference]: Finished difference Result 79677 states and 129078 transitions. [2021-12-06 18:33:17,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 290 states. [2021-12-06 18:33:17,825 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 21 states have internal predecessors, (91), 4 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 87 [2021-12-06 18:33:17,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:33:18,009 INFO L225 Difference]: With dead ends: 79677 [2021-12-06 18:33:18,009 INFO L226 Difference]: Without dead ends: 79675 [2021-12-06 18:33:18,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 177 SyntacticMatches, 7 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37689 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5012, Invalid=80544, Unknown=0, NotChecked=0, Total=85556 [2021-12-06 18:33:18,035 INFO L933 BasicCegarLoop]: 1020 mSDtfsCounter, 412 mSDsluCounter, 5170 mSDsCounter, 0 mSdLazyCounter, 15585 mSolverCounterSat, 2751 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 6190 SdHoareTripleChecker+Invalid, 18336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2751 IncrementalHoareTripleChecker+Valid, 15585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:33:18,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 6190 Invalid, 18336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2751 Valid, 15585 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2021-12-06 18:33:18,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79675 states. [2021-12-06 18:33:22,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79675 to 14395. [2021-12-06 18:33:22,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14395 states, 10334 states have (on average 1.4867427907876911) internal successors, (15364), 10334 states have internal predecessors, (15364), 4037 states have call successors, (4037), 23 states have call predecessors, (4037), 23 states have return successors, (4037), 4037 states have call predecessors, (4037), 4037 states have call successors, (4037) [2021-12-06 18:33:22,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14395 states to 14395 states and 23438 transitions. [2021-12-06 18:33:22,733 INFO L78 Accepts]: Start accepts. Automaton has 14395 states and 23438 transitions. Word has length 87 [2021-12-06 18:33:22,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:33:22,733 INFO L470 AbstractCegarLoop]: Abstraction has 14395 states and 23438 transitions. [2021-12-06 18:33:22,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 21 states have internal predecessors, (91), 4 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-12-06 18:33:22,734 INFO L276 IsEmpty]: Start isEmpty. Operand 14395 states and 23438 transitions. [2021-12-06 18:33:22,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-06 18:33:22,742 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:33:22,742 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:33:22,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-06 18:33:22,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 18:33:22,943 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:33:22,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:33:22,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1305526443, now seen corresponding path program 1 times [2021-12-06 18:33:22,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:33:22,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902966858] [2021-12-06 18:33:22,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:33:22,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:33:22,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:33:23,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:33:23,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:33:23,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:33:23,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:33:23,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:33:23,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:33:23,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:33:23,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:33:23,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 18:33:23,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:33:23,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:33:23,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:33:23,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:33:23,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:33:23,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 18:33:23,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:33:23,094 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 18:33:23,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:33:23,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902966858] [2021-12-06 18:33:23,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902966858] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:33:23,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521735869] [2021-12-06 18:33:23,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:33:23,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:33:23,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:33:23,095 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:33:23,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 18:33:23,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:33:23,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-06 18:33:23,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:33:23,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 18:33:23,374 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 18:33:23,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-06 18:33:23,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-06 18:33:23,647 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 21 proven. 88 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-06 18:33:23,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:33:23,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 18:33:23,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-06 18:33:23,983 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 18:33:23,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521735869] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:33:23,983 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:33:23,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 39 [2021-12-06 18:33:23,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707924171] [2021-12-06 18:33:23,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:33:23,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-06 18:33:23,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:33:23,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-06 18:33:23,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1339, Unknown=0, NotChecked=0, Total=1482 [2021-12-06 18:33:23,985 INFO L87 Difference]: Start difference. First operand 14395 states and 23438 transitions. Second operand has 39 states, 39 states have (on average 4.153846153846154) internal successors, (162), 39 states have internal predecessors, (162), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-06 18:36:36,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:36:36,563 INFO L93 Difference]: Finished difference Result 63957 states and 103586 transitions. [2021-12-06 18:36:36,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 215 states. [2021-12-06 18:36:36,563 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.153846153846154) internal successors, (162), 39 states have internal predecessors, (162), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) Word has length 87 [2021-12-06 18:36:36,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:36:36,692 INFO L225 Difference]: With dead ends: 63957 [2021-12-06 18:36:36,692 INFO L226 Difference]: Without dead ends: 63955 [2021-12-06 18:36:36,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 182 SyntacticMatches, 4 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23269 ImplicationChecksByTransitivity, 172.4s TimeCoverageRelationStatistics Valid=6783, Invalid=50014, Unknown=85, NotChecked=0, Total=56882 [2021-12-06 18:36:36,709 INFO L933 BasicCegarLoop]: 454 mSDtfsCounter, 1646 mSDsluCounter, 3019 mSDsCounter, 0 mSdLazyCounter, 8351 mSolverCounterSat, 4050 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1670 SdHoareTripleChecker+Valid, 3473 SdHoareTripleChecker+Invalid, 13208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4050 IncrementalHoareTripleChecker+Valid, 8351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 807 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:36:36,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1670 Valid, 3473 Invalid, 13208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4050 Valid, 8351 Invalid, 0 Unknown, 807 Unchecked, 5.2s Time] [2021-12-06 18:36:36,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63955 states. [2021-12-06 18:36:41,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63955 to 16459. [2021-12-06 18:36:41,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16459 states, 11806 states have (on average 1.4870404878875148) internal successors, (17556), 11806 states have internal predecessors, (17556), 4613 states have call successors, (4613), 39 states have call predecessors, (4613), 39 states have return successors, (4613), 4613 states have call predecessors, (4613), 4613 states have call successors, (4613) [2021-12-06 18:36:41,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16459 states to 16459 states and 26782 transitions. [2021-12-06 18:36:41,677 INFO L78 Accepts]: Start accepts. Automaton has 16459 states and 26782 transitions. Word has length 87 [2021-12-06 18:36:41,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:36:41,678 INFO L470 AbstractCegarLoop]: Abstraction has 16459 states and 26782 transitions. [2021-12-06 18:36:41,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.153846153846154) internal successors, (162), 39 states have internal predecessors, (162), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-06 18:36:41,678 INFO L276 IsEmpty]: Start isEmpty. Operand 16459 states and 26782 transitions. [2021-12-06 18:36:41,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-06 18:36:41,689 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:36:41,690 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:36:41,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 18:36:41,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:36:41,890 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:36:41,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:36:41,890 INFO L85 PathProgramCache]: Analyzing trace with hash 112654004, now seen corresponding path program 2 times [2021-12-06 18:36:41,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:36:41,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390855071] [2021-12-06 18:36:41,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:36:41,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:36:41,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:36:42,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:36:42,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:36:42,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:36:42,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:36:42,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:36:42,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:36:42,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:36:42,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:36:42,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 18:36:42,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:36:42,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:36:42,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:36:42,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:36:42,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:36:42,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 18:36:42,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:36:42,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 18:36:42,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:36:42,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 18:36:42,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:36:42,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-06 18:36:42,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:36:42,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-06 18:36:42,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:36:42,164 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-12-06 18:36:42,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:36:42,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390855071] [2021-12-06 18:36:42,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390855071] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:36:42,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009656412] [2021-12-06 18:36:42,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:36:42,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:36:42,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:36:42,166 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:36:42,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 18:36:42,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:36:42,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:36:42,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-06 18:36:42,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:36:42,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 18:36:42,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:42,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 18:36:42,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:42,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 18:36:42,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:42,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 18:36:42,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:42,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 18:36:42,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:42,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 18:36:42,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:42,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 18:36:42,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:42,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 18:36:42,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:42,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 18:36:42,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:42,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 18:36:42,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:42,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 18:36:42,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:36:42,861 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 73 proven. 34 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-12-06 18:36:42,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:36:44,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009656412] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:36:44,165 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:36:44,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-12-06 18:36:44,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468240800] [2021-12-06 18:36:44,166 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:36:44,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 18:36:44,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:36:44,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 18:36:44,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=417, Unknown=1, NotChecked=0, Total=506 [2021-12-06 18:36:44,167 INFO L87 Difference]: Start difference. First operand 16459 states and 26782 transitions. Second operand has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-06 18:36:49,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:36:49,989 INFO L93 Difference]: Finished difference Result 21046 states and 34071 transitions. [2021-12-06 18:36:49,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 18:36:49,990 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) Word has length 93 [2021-12-06 18:36:49,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:36:50,019 INFO L225 Difference]: With dead ends: 21046 [2021-12-06 18:36:50,019 INFO L226 Difference]: Without dead ends: 21044 [2021-12-06 18:36:50,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 117 SyntacticMatches, 24 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=256, Invalid=1303, Unknown=1, NotChecked=0, Total=1560 [2021-12-06 18:36:50,024 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 96 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:36:50,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 655 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 578 Invalid, 0 Unknown, 130 Unchecked, 0.3s Time] [2021-12-06 18:36:50,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21044 states. [2021-12-06 18:36:54,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21044 to 16571. [2021-12-06 18:36:54,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16571 states, 11886 states have (on average 1.486622917718324) internal successors, (17670), 11886 states have internal predecessors, (17670), 4641 states have call successors, (4641), 43 states have call predecessors, (4641), 43 states have return successors, (4641), 4641 states have call predecessors, (4641), 4641 states have call successors, (4641) [2021-12-06 18:36:54,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16571 states to 16571 states and 26952 transitions. [2021-12-06 18:36:54,368 INFO L78 Accepts]: Start accepts. Automaton has 16571 states and 26952 transitions. Word has length 93 [2021-12-06 18:36:54,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:36:54,369 INFO L470 AbstractCegarLoop]: Abstraction has 16571 states and 26952 transitions. [2021-12-06 18:36:54,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-06 18:36:54,369 INFO L276 IsEmpty]: Start isEmpty. Operand 16571 states and 26952 transitions. [2021-12-06 18:36:54,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-06 18:36:54,378 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:36:54,378 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:36:54,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-06 18:36:54,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:36:54,579 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:36:54,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:36:54,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1498857398, now seen corresponding path program 1 times [2021-12-06 18:36:54,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:36:54,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108432110] [2021-12-06 18:36:54,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:36:54,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:36:54,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:36:54,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:36:54,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:36:54,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:36:54,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:36:54,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:36:54,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:36:54,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:36:54,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:36:54,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 18:36:54,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:36:54,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:36:54,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:36:54,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:36:54,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:36:54,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 18:36:54,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:36:54,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 18:36:54,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:36:54,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 18:36:54,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:36:54,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-06 18:36:54,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:36:54,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-06 18:36:54,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:36:54,774 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-12-06 18:36:54,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:36:54,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108432110] [2021-12-06 18:36:54,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108432110] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:36:54,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683923328] [2021-12-06 18:36:54,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:36:54,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:36:54,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:36:54,776 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:36:54,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 18:36:54,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:36:54,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-06 18:36:54,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:36:54,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 18:36:54,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:54,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 18:36:55,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:55,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 18:36:55,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:55,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 18:36:55,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:55,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 18:36:55,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:55,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 18:36:55,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:55,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 18:36:55,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:55,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 18:36:55,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:55,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 18:36:55,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:55,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 18:36:55,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:55,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 18:36:55,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:36:55,440 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 73 proven. 34 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-12-06 18:36:55,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:36:56,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683923328] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:36:56,753 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:36:56,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-12-06 18:36:56,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930897868] [2021-12-06 18:36:56,753 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:36:56,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 18:36:56,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:36:56,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 18:36:56,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=459, Unknown=1, NotChecked=0, Total=552 [2021-12-06 18:36:56,754 INFO L87 Difference]: Start difference. First operand 16571 states and 26952 transitions. Second operand has 20 states, 20 states have (on average 4.55) internal successors, (91), 20 states have internal predecessors, (91), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-06 18:37:01,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:37:01,406 INFO L93 Difference]: Finished difference Result 16905 states and 27298 transitions. [2021-12-06 18:37:01,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 18:37:01,406 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.55) internal successors, (91), 20 states have internal predecessors, (91), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) Word has length 93 [2021-12-06 18:37:01,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:37:01,431 INFO L225 Difference]: With dead ends: 16905 [2021-12-06 18:37:01,432 INFO L226 Difference]: Without dead ends: 16903 [2021-12-06 18:37:01,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 116 SyntacticMatches, 23 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=256, Invalid=1225, Unknown=1, NotChecked=0, Total=1482 [2021-12-06 18:37:01,436 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 109 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:37:01,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 526 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 718 Invalid, 0 Unknown, 51 Unchecked, 0.3s Time] [2021-12-06 18:37:01,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16903 states. [2021-12-06 18:37:04,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16903 to 8581. [2021-12-06 18:37:04,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8581 states, 6164 states have (on average 1.4813432835820894) internal successors, (9131), 6164 states have internal predecessors, (9131), 2384 states have call successors, (2384), 32 states have call predecessors, (2384), 32 states have return successors, (2384), 2384 states have call predecessors, (2384), 2384 states have call successors, (2384) [2021-12-06 18:37:04,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8581 states to 8581 states and 13899 transitions. [2021-12-06 18:37:04,948 INFO L78 Accepts]: Start accepts. Automaton has 8581 states and 13899 transitions. Word has length 93 [2021-12-06 18:37:04,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:37:04,949 INFO L470 AbstractCegarLoop]: Abstraction has 8581 states and 13899 transitions. [2021-12-06 18:37:04,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.55) internal successors, (91), 20 states have internal predecessors, (91), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-06 18:37:04,949 INFO L276 IsEmpty]: Start isEmpty. Operand 8581 states and 13899 transitions. [2021-12-06 18:37:04,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-06 18:37:04,954 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:37:04,954 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:37:04,973 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-06 18:37:05,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-06 18:37:05,155 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:37:05,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:37:05,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1859857993, now seen corresponding path program 8 times [2021-12-06 18:37:05,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:37:05,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528087489] [2021-12-06 18:37:05,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:37:05,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:37:05,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:37:05,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:37:05,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:37:05,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:37:05,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:37:05,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:37:05,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:37:05,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:37:05,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:37:05,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 18:37:05,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:37:05,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:37:05,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:37:05,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:37:05,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:37:05,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 18:37:05,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:37:05,297 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 18:37:05,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:37:05,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528087489] [2021-12-06 18:37:05,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528087489] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:37:05,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460188913] [2021-12-06 18:37:05,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:37:05,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:37:05,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:37:05,298 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:37:05,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 18:37:05,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:37:05,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:37:05,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-06 18:37:05,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:37:05,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 18:37:05,632 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-06 18:37:05,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2021-12-06 18:37:05,647 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 18:37:05,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:37:05,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 18:37:05,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-06 18:37:05,778 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 18:37:05,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460188913] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:37:05,778 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:37:05,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 23 [2021-12-06 18:37:05,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603573777] [2021-12-06 18:37:05,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:37:05,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 18:37:05,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:37:05,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 18:37:05,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-12-06 18:37:05,780 INFO L87 Difference]: Start difference. First operand 8581 states and 13899 transitions. Second operand has 23 states, 23 states have (on average 4.173913043478261) internal successors, (96), 23 states have internal predecessors, (96), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 18:38:03,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:38:03,791 INFO L93 Difference]: Finished difference Result 92336 states and 149354 transitions. [2021-12-06 18:38:03,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 482 states. [2021-12-06 18:38:03,792 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.173913043478261) internal successors, (96), 23 states have internal predecessors, (96), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 91 [2021-12-06 18:38:03,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:38:03,979 INFO L225 Difference]: With dead ends: 92336 [2021-12-06 18:38:03,979 INFO L226 Difference]: Without dead ends: 92334 [2021-12-06 18:38:04,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 675 GetRequests, 184 SyntacticMatches, 6 SemanticMatches, 485 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107715 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=10015, Invalid=226667, Unknown=0, NotChecked=0, Total=236682 [2021-12-06 18:38:04,013 INFO L933 BasicCegarLoop]: 1731 mSDtfsCounter, 502 mSDsluCounter, 7496 mSDsCounter, 0 mSdLazyCounter, 26651 mSolverCounterSat, 4602 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 9227 SdHoareTripleChecker+Invalid, 31253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4602 IncrementalHoareTripleChecker+Valid, 26651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:38:04,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [542 Valid, 9227 Invalid, 31253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4602 Valid, 26651 Invalid, 0 Unknown, 0 Unchecked, 14.0s Time] [2021-12-06 18:38:04,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92334 states. [2021-12-06 18:38:13,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92334 to 18990. [2021-12-06 18:38:13,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18990 states, 13604 states have (on average 1.4862540429285505) internal successors, (20219), 13604 states have internal predecessors, (20219), 5353 states have call successors, (5353), 32 states have call predecessors, (5353), 32 states have return successors, (5353), 5353 states have call predecessors, (5353), 5353 states have call successors, (5353) [2021-12-06 18:38:13,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18990 states to 18990 states and 30925 transitions. [2021-12-06 18:38:13,514 INFO L78 Accepts]: Start accepts. Automaton has 18990 states and 30925 transitions. Word has length 91 [2021-12-06 18:38:13,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:38:13,514 INFO L470 AbstractCegarLoop]: Abstraction has 18990 states and 30925 transitions. [2021-12-06 18:38:13,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.173913043478261) internal successors, (96), 23 states have internal predecessors, (96), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 18:38:13,514 INFO L276 IsEmpty]: Start isEmpty. Operand 18990 states and 30925 transitions. [2021-12-06 18:38:13,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-06 18:38:13,521 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:38:13,521 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:38:13,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-06 18:38:13,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-06 18:38:13,722 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:38:13,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:38:13,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1015852491, now seen corresponding path program 1 times [2021-12-06 18:38:13,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:38:13,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852041784] [2021-12-06 18:38:13,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:38:13,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:38:13,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:38:13,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:38:13,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:38:13,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:38:13,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:38:13,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:38:13,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:38:13,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:38:13,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:38:13,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 18:38:13,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:38:13,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:38:13,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:38:13,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:38:13,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:38:13,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 18:38:13,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:38:13,867 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 18:38:13,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:38:13,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852041784] [2021-12-06 18:38:13,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852041784] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:38:13,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283194215] [2021-12-06 18:38:13,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:38:13,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:38:13,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:38:13,869 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:38:13,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-06 18:38:13,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:38:13,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-06 18:38:13,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:38:14,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:38:14,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-06 18:38:14,376 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 18:38:14,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:38:14,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 18:38:14,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-06 18:38:14,683 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 18:38:14,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283194215] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:38:14,683 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:38:14,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 41 [2021-12-06 18:38:14,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046285539] [2021-12-06 18:38:14,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:38:14,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-06 18:38:14,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:38:14,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-06 18:38:14,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1485, Unknown=0, NotChecked=0, Total=1640 [2021-12-06 18:38:14,684 INFO L87 Difference]: Start difference. First operand 18990 states and 30925 transitions. Second operand has 41 states, 41 states have (on average 4.195121951219512) internal successors, (172), 41 states have internal predecessors, (172), 6 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2021-12-06 18:39:56,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:39:56,134 INFO L93 Difference]: Finished difference Result 134235 states and 217205 transitions. [2021-12-06 18:39:56,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 808 states. [2021-12-06 18:39:56,135 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 4.195121951219512) internal successors, (172), 41 states have internal predecessors, (172), 6 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) Word has length 91 [2021-12-06 18:39:56,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:39:56,422 INFO L225 Difference]: With dead ends: 134235 [2021-12-06 18:39:56,422 INFO L226 Difference]: Without dead ends: 134233 [2021-12-06 18:39:56,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1016 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 843 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334878 ImplicationChecksByTransitivity, 30.8s TimeCoverageRelationStatistics Valid=42559, Invalid=670621, Unknown=0, NotChecked=0, Total=713180 [2021-12-06 18:39:56,491 INFO L933 BasicCegarLoop]: 1253 mSDtfsCounter, 3949 mSDsluCounter, 5182 mSDsCounter, 0 mSdLazyCounter, 21951 mSolverCounterSat, 18167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3949 SdHoareTripleChecker+Valid, 6435 SdHoareTripleChecker+Invalid, 40118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 18167 IncrementalHoareTripleChecker+Valid, 21951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:39:56,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3949 Valid, 6435 Invalid, 40118 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [18167 Valid, 21951 Invalid, 0 Unknown, 0 Unchecked, 16.0s Time] [2021-12-06 18:39:56,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134233 states. [2021-12-06 18:40:03,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134233 to 8689. [2021-12-06 18:40:03,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8689 states, 6272 states have (on average 1.4740114795918366) internal successors, (9245), 6272 states have internal predecessors, (9245), 2384 states have call successors, (2384), 32 states have call predecessors, (2384), 32 states have return successors, (2384), 2384 states have call predecessors, (2384), 2384 states have call successors, (2384) [2021-12-06 18:40:03,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8689 states to 8689 states and 14013 transitions. [2021-12-06 18:40:03,077 INFO L78 Accepts]: Start accepts. Automaton has 8689 states and 14013 transitions. Word has length 91 [2021-12-06 18:40:03,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:40:03,077 INFO L470 AbstractCegarLoop]: Abstraction has 8689 states and 14013 transitions. [2021-12-06 18:40:03,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 4.195121951219512) internal successors, (172), 41 states have internal predecessors, (172), 6 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2021-12-06 18:40:03,078 INFO L276 IsEmpty]: Start isEmpty. Operand 8689 states and 14013 transitions. [2021-12-06 18:40:03,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-06 18:40:03,083 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:40:03,083 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:40:03,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-06 18:40:03,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-06 18:40:03,284 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:40:03,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:40:03,285 INFO L85 PathProgramCache]: Analyzing trace with hash 2139113258, now seen corresponding path program 2 times [2021-12-06 18:40:03,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:40:03,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295466905] [2021-12-06 18:40:03,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:40:03,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:40:03,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:03,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:40:03,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:03,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:40:03,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:03,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:40:03,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:03,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:40:03,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:03,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 18:40:03,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:03,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:40:03,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:03,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:40:03,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:03,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 18:40:03,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:03,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 18:40:03,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:03,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 18:40:03,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:03,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-06 18:40:03,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:03,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-06 18:40:03,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:03,471 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-12-06 18:40:03,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:40:03,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295466905] [2021-12-06 18:40:03,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295466905] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:40:03,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697217726] [2021-12-06 18:40:03,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:40:03,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:40:03,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:40:03,473 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:40:03,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-06 18:40:03,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:40:03,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:40:03,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-06 18:40:03,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:40:03,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 18:40:03,674 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 18:40:03,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 18:40:03,734 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 18:40:03,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 18:40:03,772 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 18:40:03,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 18:40:03,812 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 18:40:03,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 18:40:03,856 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 18:40:03,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 18:40:03,920 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 18:40:03,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 18:40:03,964 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 18:40:03,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 18:40:04,009 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 18:40:04,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 18:40:04,054 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 18:40:04,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 18:40:04,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-06 18:40:04,151 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 94 proven. 40 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-12-06 18:40:04,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:40:04,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697217726] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:40:04,269 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:40:04,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-12-06 18:40:04,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639087639] [2021-12-06 18:40:04,269 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:40:04,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 18:40:04,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:40:04,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 18:40:04,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-12-06 18:40:04,270 INFO L87 Difference]: Start difference. First operand 8689 states and 14013 transitions. Second operand has 22 states, 22 states have (on average 4.5) internal successors, (99), 22 states have internal predecessors, (99), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-06 18:40:11,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:40:11,422 INFO L93 Difference]: Finished difference Result 14994 states and 23970 transitions. [2021-12-06 18:40:11,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-06 18:40:11,423 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.5) internal successors, (99), 22 states have internal predecessors, (99), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) Word has length 97 [2021-12-06 18:40:11,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:40:11,443 INFO L225 Difference]: With dead ends: 14994 [2021-12-06 18:40:11,443 INFO L226 Difference]: Without dead ends: 14992 [2021-12-06 18:40:11,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 120 SyntacticMatches, 20 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1039 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=424, Invalid=2438, Unknown=0, NotChecked=0, Total=2862 [2021-12-06 18:40:11,446 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 156 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 1169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:40:11,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 626 Invalid, 1169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 837 Invalid, 0 Unknown, 120 Unchecked, 0.5s Time] [2021-12-06 18:40:11,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14992 states. [2021-12-06 18:40:15,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14992 to 3415. [2021-12-06 18:40:15,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3415 states, 2484 states have (on average 1.4500805152979066) internal successors, (3602), 2485 states have internal predecessors, (3602), 898 states have call successors, (898), 32 states have call predecessors, (898), 32 states have return successors, (898), 897 states have call predecessors, (898), 898 states have call successors, (898) [2021-12-06 18:40:15,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3415 states to 3415 states and 5398 transitions. [2021-12-06 18:40:15,149 INFO L78 Accepts]: Start accepts. Automaton has 3415 states and 5398 transitions. Word has length 97 [2021-12-06 18:40:15,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:40:15,149 INFO L470 AbstractCegarLoop]: Abstraction has 3415 states and 5398 transitions. [2021-12-06 18:40:15,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.5) internal successors, (99), 22 states have internal predecessors, (99), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-06 18:40:15,149 INFO L276 IsEmpty]: Start isEmpty. Operand 3415 states and 5398 transitions. [2021-12-06 18:40:15,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-06 18:40:15,151 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:40:15,152 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:40:15,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-06 18:40:15,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-06 18:40:15,353 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:40:15,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:40:15,354 INFO L85 PathProgramCache]: Analyzing trace with hash 512678207, now seen corresponding path program 9 times [2021-12-06 18:40:15,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:40:15,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018411605] [2021-12-06 18:40:15,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:40:15,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:40:15,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:15,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:40:15,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:15,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:40:15,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:15,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:40:15,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:15,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:40:15,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:15,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 18:40:15,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:15,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:40:15,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:15,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:40:15,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:15,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 18:40:15,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:15,625 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 99 proven. 45 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 18:40:15,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:40:15,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018411605] [2021-12-06 18:40:15,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018411605] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:40:15,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039937434] [2021-12-06 18:40:15,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:40:15,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:40:15,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:40:15,626 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:40:15,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-06 18:40:15,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-06 18:40:15,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:40:15,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 18:40:15,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:40:16,464 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 128 proven. 16 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 18:40:16,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:40:16,773 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 128 proven. 16 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 18:40:16,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039937434] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:40:16,773 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:40:16,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 46 [2021-12-06 18:40:16,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152513158] [2021-12-06 18:40:16,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:40:16,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-06 18:40:16,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:40:16,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-06 18:40:16,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=512, Invalid=1558, Unknown=0, NotChecked=0, Total=2070 [2021-12-06 18:40:16,775 INFO L87 Difference]: Start difference. First operand 3415 states and 5398 transitions. Second operand has 46 states, 46 states have (on average 4.021739130434782) internal successors, (185), 46 states have internal predecessors, (185), 6 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2021-12-06 18:40:20,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:40:20,930 INFO L93 Difference]: Finished difference Result 3539 states and 5573 transitions. [2021-12-06 18:40:20,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 18:40:20,931 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.021739130434782) internal successors, (185), 46 states have internal predecessors, (185), 6 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) Word has length 95 [2021-12-06 18:40:20,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:40:20,935 INFO L225 Difference]: With dead ends: 3539 [2021-12-06 18:40:20,935 INFO L226 Difference]: Without dead ends: 3499 [2021-12-06 18:40:20,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=678, Invalid=2078, Unknown=0, NotChecked=0, Total=2756 [2021-12-06 18:40:20,937 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 355 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:40:20,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 215 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:40:20,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3499 states. [2021-12-06 18:40:24,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3499 to 3434. [2021-12-06 18:40:24,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3434 states, 2500 states have (on average 1.4372) internal successors, (3593), 2501 states have internal predecessors, (3593), 901 states have call successors, (901), 32 states have call predecessors, (901), 32 states have return successors, (901), 900 states have call predecessors, (901), 901 states have call successors, (901) [2021-12-06 18:40:24,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 5395 transitions. [2021-12-06 18:40:24,550 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 5395 transitions. Word has length 95 [2021-12-06 18:40:24,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:40:24,551 INFO L470 AbstractCegarLoop]: Abstraction has 3434 states and 5395 transitions. [2021-12-06 18:40:24,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.021739130434782) internal successors, (185), 46 states have internal predecessors, (185), 6 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2021-12-06 18:40:24,551 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 5395 transitions. [2021-12-06 18:40:24,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-06 18:40:24,555 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:40:24,555 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 9, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:40:24,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-06 18:40:24,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:40:24,757 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:40:24,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:40:24,758 INFO L85 PathProgramCache]: Analyzing trace with hash -525089814, now seen corresponding path program 10 times [2021-12-06 18:40:24,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:40:24,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357181505] [2021-12-06 18:40:24,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:40:24,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:40:24,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:24,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:40:24,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:24,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:40:24,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:24,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:40:24,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:24,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:40:24,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:24,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 18:40:24,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:24,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:40:24,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:24,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:40:24,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:24,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 18:40:24,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:24,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 18:40:24,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:24,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 18:40:24,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:24,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-06 18:40:24,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:24,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-06 18:40:24,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:24,952 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 0 proven. 173 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-12-06 18:40:24,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:40:24,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357181505] [2021-12-06 18:40:24,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357181505] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:40:24,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952526696] [2021-12-06 18:40:24,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:40:24,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:40:24,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:40:24,953 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:40:24,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f60d66-383a-487e-8c47-2b644ebf1be8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-06 18:40:25,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:40:25,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:40:25,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-06 18:40:25,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:40:25,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 18:40:25,138 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 18:40:25,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-06 18:40:25,156 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 18:40:25,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-06 18:40:25,175 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 18:40:25,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-06 18:40:25,379 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-06 18:40:25,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2021-12-06 18:40:25,395 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 0 proven. 173 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-12-06 18:40:25,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:40:25,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 18:40:25,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-06 18:40:25,625 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 0 proven. 173 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-12-06 18:40:25,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952526696] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:40:25,625 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:40:25,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 26 [2021-12-06 18:40:25,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036681420] [2021-12-06 18:40:25,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:40:25,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 18:40:25,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:40:25,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 18:40:25,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-12-06 18:40:25,627 INFO L87 Difference]: Start difference. First operand 3434 states and 5395 transitions. Second operand has 26 states, 26 states have (on average 4.653846153846154) internal successors, (121), 26 states have internal predecessors, (121), 5 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15)