./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX --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 8262fd4bdb4bed8fef0fbefd142e15775d81a64587fab0af0aa2004f91ae895c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 08:41:49,481 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 08:41:49,484 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 08:41:49,526 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 08:41:49,527 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 08:41:49,528 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 08:41:49,531 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 08:41:49,533 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 08:41:49,536 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 08:41:49,537 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 08:41:49,539 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 08:41:49,541 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 08:41:49,541 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 08:41:49,543 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 08:41:49,545 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 08:41:49,546 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 08:41:49,548 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 08:41:49,549 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 08:41:49,552 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 08:41:49,555 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 08:41:49,557 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 08:41:49,559 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 08:41:49,561 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 08:41:49,563 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 08:41:49,568 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 08:41:49,568 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 08:41:49,569 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 08:41:49,570 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 08:41:49,571 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 08:41:49,573 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 08:41:49,573 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 08:41:49,575 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 08:41:49,576 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 08:41:49,577 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 08:41:49,579 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 08:41:49,579 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 08:41:49,581 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 08:41:49,581 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 08:41:49,582 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 08:41:49,583 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 08:41:49,584 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 08:41:49,586 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 08:41:49,614 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 08:41:49,615 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 08:41:49,616 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 08:41:49,616 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 08:41:49,618 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 08:41:49,618 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 08:41:49,619 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 08:41:49,619 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 08:41:49,620 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 08:41:49,620 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 08:41:49,621 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 08:41:49,621 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 08:41:49,622 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 08:41:49,622 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 08:41:49,623 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 08:41:49,623 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 08:41:49,623 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 08:41:49,624 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 08:41:49,624 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 08:41:49,625 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 08:41:49,625 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 08:41:49,626 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 08:41:49,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:41:49,627 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 08:41:49,627 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 08:41:49,628 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 08:41:49,628 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 08:41:49,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 08:41:49,629 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 08:41:49,629 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 08:41:49,629 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 08:41:49,629 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 08:41:49,630 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_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8262fd4bdb4bed8fef0fbefd142e15775d81a64587fab0af0aa2004f91ae895c [2021-11-09 08:41:49,939 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 08:41:49,970 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 08:41:49,975 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 08:41:49,977 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 08:41:49,978 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 08:41:49,979 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c [2021-11-09 08:41:50,065 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/data/18dd40d20/45b5a03879334345b263c55595f2182e/FLAGd14fa6c07 [2021-11-09 08:41:50,627 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 08:41:50,627 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c [2021-11-09 08:41:50,633 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/data/18dd40d20/45b5a03879334345b263c55595f2182e/FLAGd14fa6c07 [2021-11-09 08:41:50,990 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/data/18dd40d20/45b5a03879334345b263c55595f2182e [2021-11-09 08:41:50,993 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 08:41:50,995 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 08:41:51,005 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 08:41:51,005 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 08:41:51,018 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 08:41:51,019 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:41:50" (1/1) ... [2021-11-09 08:41:51,021 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@729eeeb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:41:51, skipping insertion in model container [2021-11-09 08:41:51,021 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:41:50" (1/1) ... [2021-11-09 08:41:51,030 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 08:41:51,054 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 08:41:51,261 WARN L228 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_f5dd4434-6ab5-4bac-9704-84f0d1722304/sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c[423,436] [2021-11-09 08:41:51,282 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:41:51,292 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 08:41:51,308 WARN L228 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_f5dd4434-6ab5-4bac-9704-84f0d1722304/sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c[423,436] [2021-11-09 08:41:51,319 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:41:51,335 INFO L208 MainTranslator]: Completed translation [2021-11-09 08:41:51,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:41:51 WrapperNode [2021-11-09 08:41:51,336 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 08:41:51,337 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 08:41:51,338 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 08:41:51,338 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 08:41:51,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:41:51" (1/1) ... [2021-11-09 08:41:51,356 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:41:51" (1/1) ... [2021-11-09 08:41:51,383 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 08:41:51,384 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 08:41:51,384 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 08:41:51,385 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 08:41:51,395 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:41:51" (1/1) ... [2021-11-09 08:41:51,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:41:51" (1/1) ... [2021-11-09 08:41:51,398 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:41:51" (1/1) ... [2021-11-09 08:41:51,398 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:41:51" (1/1) ... [2021-11-09 08:41:51,405 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:41:51" (1/1) ... [2021-11-09 08:41:51,411 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:41:51" (1/1) ... [2021-11-09 08:41:51,412 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:41:51" (1/1) ... [2021-11-09 08:41:51,415 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 08:41:51,416 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 08:41:51,417 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 08:41:51,417 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 08:41:51,423 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:41:51" (1/1) ... [2021-11-09 08:41:51,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:41:51,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:41:51,469 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 08:41:51,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 08:41:51,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 08:41:51,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 08:41:51,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 08:41:51,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 08:41:51,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 08:41:51,532 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 08:41:51,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 08:41:51,894 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 08:41:51,895 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-11-09 08:41:51,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:41:51 BoogieIcfgContainer [2021-11-09 08:41:51,897 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 08:41:51,899 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 08:41:51,900 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 08:41:51,904 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 08:41:51,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 08:41:50" (1/3) ... [2021-11-09 08:41:51,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55916b7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:41:51, skipping insertion in model container [2021-11-09 08:41:51,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:41:51" (2/3) ... [2021-11-09 08:41:51,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55916b7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:41:51, skipping insertion in model container [2021-11-09 08:41:51,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:41:51" (3/3) ... [2021-11-09 08:41:51,908 INFO L111 eAbstractionObserver]: Analyzing ICFG array_min_and_copy_shift_sum_add.c [2021-11-09 08:41:51,915 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 08:41:51,915 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 08:41:51,971 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 08:41:51,979 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 [2021-11-09 08:41:51,980 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 08:41:51,996 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.52) internal successors, (38), 26 states have internal predecessors, (38), 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) [2021-11-09 08:41:52,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-09 08:41:52,002 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:52,003 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:52,004 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:41:52,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:52,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1074116968, now seen corresponding path program 1 times [2021-11-09 08:41:52,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:52,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869324688] [2021-11-09 08:41:52,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:52,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:52,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:52,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:41:52,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:52,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869324688] [2021-11-09 08:41:52,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869324688] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:41:52,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:41:52,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 08:41:52,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668355756] [2021-11-09 08:41:52,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 08:41:52,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:52,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 08:41:52,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 08:41:52,280 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.52) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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) [2021-11-09 08:41:52,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:52,299 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2021-11-09 08:41:52,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 08:41:52,301 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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 14 [2021-11-09 08:41:52,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:52,310 INFO L225 Difference]: With dead ends: 51 [2021-11-09 08:41:52,311 INFO L226 Difference]: Without dead ends: 23 [2021-11-09 08:41:52,314 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 08:41:52,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-09 08:41:52,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-09 08:41:52,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 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) [2021-11-09 08:41:52,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-11-09 08:41:52,347 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 14 [2021-11-09 08:41:52,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:52,347 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-11-09 08:41:52,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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) [2021-11-09 08:41:52,348 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-11-09 08:41:52,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-09 08:41:52,349 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:52,349 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:52,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 08:41:52,350 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:41:52,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:52,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1208978540, now seen corresponding path program 1 times [2021-11-09 08:41:52,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:52,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054974563] [2021-11-09 08:41:52,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:52,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:52,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:52,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:41:52,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:52,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054974563] [2021-11-09 08:41:52,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054974563] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:41:52,492 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:41:52,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:41:52,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678230846] [2021-11-09 08:41:52,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:41:52,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:52,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:41:52,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:41:52,497 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-11-09 08:41:52,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:52,556 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-11-09 08:41:52,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:41:52,557 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 14 [2021-11-09 08:41:52,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:52,558 INFO L225 Difference]: With dead ends: 28 [2021-11-09 08:41:52,558 INFO L226 Difference]: Without dead ends: 24 [2021-11-09 08:41:52,559 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:41:52,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-09 08:41:52,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-09 08:41:52,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 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) [2021-11-09 08:41:52,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-11-09 08:41:52,564 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 14 [2021-11-09 08:41:52,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:52,565 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-11-09 08:41:52,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-11-09 08:41:52,566 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-11-09 08:41:52,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-09 08:41:52,567 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:52,567 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:52,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 08:41:52,567 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:41:52,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:52,569 INFO L85 PathProgramCache]: Analyzing trace with hash -2133972746, now seen corresponding path program 1 times [2021-11-09 08:41:52,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:52,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093037928] [2021-11-09 08:41:52,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:52,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:52,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:52,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:41:52,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:52,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093037928] [2021-11-09 08:41:52,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093037928] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:41:52,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:41:52,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 08:41:52,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065737935] [2021-11-09 08:41:52,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:41:52,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:52,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:41:52,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:41:52,677 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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) [2021-11-09 08:41:52,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:52,761 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2021-11-09 08:41:52,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:41:52,762 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 16 [2021-11-09 08:41:52,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:52,763 INFO L225 Difference]: With dead ends: 48 [2021-11-09 08:41:52,763 INFO L226 Difference]: Without dead ends: 34 [2021-11-09 08:41:52,764 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:41:52,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-09 08:41:52,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2021-11-09 08:41:52,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 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) [2021-11-09 08:41:52,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-11-09 08:41:52,770 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2021-11-09 08:41:52,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:52,771 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-11-09 08:41:52,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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) [2021-11-09 08:41:52,772 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-11-09 08:41:52,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-09 08:41:52,773 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:52,773 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-09 08:41:52,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 08:41:52,774 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:41:52,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:52,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1668746636, now seen corresponding path program 1 times [2021-11-09 08:41:52,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:52,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659995491] [2021-11-09 08:41:52,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:52,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:52,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:53,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:41:53,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:53,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659995491] [2021-11-09 08:41:53,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659995491] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:53,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153027776] [2021-11-09 08:41:53,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:53,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:53,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:41:53,374 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:41:53,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 08:41:53,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:53,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 08:41:53,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:41:53,907 INFO L354 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2021-11-09 08:41:53,908 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 27 treesize of output 26 [2021-11-09 08:41:54,013 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 [2021-11-09 08:41:54,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:41:54,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153027776] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:54,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:41:54,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-11-09 08:41:54,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647293801] [2021-11-09 08:41:54,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 08:41:54,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:54,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 08:41:54,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-11-09 08:41:54,051 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 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) [2021-11-09 08:41:54,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:54,295 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2021-11-09 08:41:54,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 08:41:54,296 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 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 25 [2021-11-09 08:41:54,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:54,306 INFO L225 Difference]: With dead ends: 53 [2021-11-09 08:41:54,306 INFO L226 Difference]: Without dead ends: 49 [2021-11-09 08:41:54,311 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-11-09 08:41:54,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-09 08:41:54,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2021-11-09 08:41:54,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.25) internal successors, (55), 44 states have internal predecessors, (55), 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) [2021-11-09 08:41:54,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2021-11-09 08:41:54,330 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 25 [2021-11-09 08:41:54,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:54,331 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2021-11-09 08:41:54,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 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) [2021-11-09 08:41:54,332 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2021-11-09 08:41:54,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-09 08:41:54,334 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:54,334 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-09 08:41:54,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 08:41:54,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:54,550 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:41:54,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:54,552 INFO L85 PathProgramCache]: Analyzing trace with hash 657629386, now seen corresponding path program 1 times [2021-11-09 08:41:54,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:54,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87924815] [2021-11-09 08:41:54,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:54,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:54,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:54,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:41:54,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:54,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87924815] [2021-11-09 08:41:54,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87924815] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:54,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256751569] [2021-11-09 08:41:54,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:54,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:54,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:41:54,970 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:41:54,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 08:41:55,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:55,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 08:41:55,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:41:55,354 INFO L354 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2021-11-09 08:41:55,354 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 27 treesize of output 26 [2021-11-09 08:41:55,455 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 [2021-11-09 08:41:55,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:41:55,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256751569] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:55,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:41:55,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-11-09 08:41:55,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939584611] [2021-11-09 08:41:55,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 08:41:55,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:55,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 08:41:55,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-11-09 08:41:55,494 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 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) [2021-11-09 08:41:55,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:55,715 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2021-11-09 08:41:55,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 08:41:55,716 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 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 25 [2021-11-09 08:41:55,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:55,719 INFO L225 Difference]: With dead ends: 68 [2021-11-09 08:41:55,719 INFO L226 Difference]: Without dead ends: 64 [2021-11-09 08:41:55,719 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2021-11-09 08:41:55,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-09 08:41:55,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 45. [2021-11-09 08:41:55,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.25) internal successors, (55), 44 states have internal predecessors, (55), 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) [2021-11-09 08:41:55,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2021-11-09 08:41:55,727 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 25 [2021-11-09 08:41:55,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:55,728 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2021-11-09 08:41:55,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 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) [2021-11-09 08:41:55,728 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2021-11-09 08:41:55,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-09 08:41:55,729 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:55,729 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-09 08:41:55,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 08:41:55,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:55,954 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:41:55,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:55,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1695950062, now seen corresponding path program 2 times [2021-11-09 08:41:55,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:55,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328291576] [2021-11-09 08:41:55,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:55,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:55,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:56,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:41:56,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:56,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328291576] [2021-11-09 08:41:56,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328291576] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:56,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000239196] [2021-11-09 08:41:56,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:41:56,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:56,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:41:56,094 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:41:56,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 08:41:56,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:41:56,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:41:56,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 08:41:56,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:41:56,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:41:56,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000239196] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:56,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:41:56,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-11-09 08:41:56,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60572282] [2021-11-09 08:41:56,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 08:41:56,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:56,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 08:41:56,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:41:56,426 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 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) [2021-11-09 08:41:56,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:56,560 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2021-11-09 08:41:56,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 08:41:56,561 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 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 27 [2021-11-09 08:41:56,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:56,567 INFO L225 Difference]: With dead ends: 88 [2021-11-09 08:41:56,567 INFO L226 Difference]: Without dead ends: 69 [2021-11-09 08:41:56,568 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:41:56,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-09 08:41:56,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 50. [2021-11-09 08:41:56,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 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) [2021-11-09 08:41:56,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2021-11-09 08:41:56,585 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 27 [2021-11-09 08:41:56,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:56,585 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2021-11-09 08:41:56,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 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) [2021-11-09 08:41:56,585 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2021-11-09 08:41:56,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-09 08:41:56,587 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:56,587 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:56,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 08:41:56,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-09 08:41:56,788 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:41:56,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:56,788 INFO L85 PathProgramCache]: Analyzing trace with hash 573504280, now seen corresponding path program 3 times [2021-11-09 08:41:56,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:56,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271457680] [2021-11-09 08:41:56,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:56,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:56,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:56,925 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:41:56,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:56,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271457680] [2021-11-09 08:41:56,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271457680] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:56,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291323094] [2021-11-09 08:41:56,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:41:56,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:56,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:41:56,928 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:41:56,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 08:41:57,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 08:41:57,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:41:57,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 08:41:57,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:41:57,258 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:41:57,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291323094] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:57,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:41:57,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-11-09 08:41:57,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440830087] [2021-11-09 08:41:57,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 08:41:57,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:57,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 08:41:57,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:41:57,271 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 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) [2021-11-09 08:41:57,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:57,420 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2021-11-09 08:41:57,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 08:41:57,420 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 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 32 [2021-11-09 08:41:57,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:57,421 INFO L225 Difference]: With dead ends: 58 [2021-11-09 08:41:57,422 INFO L226 Difference]: Without dead ends: 50 [2021-11-09 08:41:57,422 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-11-09 08:41:57,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-09 08:41:57,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2021-11-09 08:41:57,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 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) [2021-11-09 08:41:57,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2021-11-09 08:41:57,428 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 32 [2021-11-09 08:41:57,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:57,428 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2021-11-09 08:41:57,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 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) [2021-11-09 08:41:57,428 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2021-11-09 08:41:57,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-09 08:41:57,430 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:57,430 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:57,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 08:41:57,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-09 08:41:57,650 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:41:57,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:57,651 INFO L85 PathProgramCache]: Analyzing trace with hash -964146404, now seen corresponding path program 4 times [2021-11-09 08:41:57,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:57,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886082277] [2021-11-09 08:41:57,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:57,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:57,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:58,660 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:41:58,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:58,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886082277] [2021-11-09 08:41:58,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886082277] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:58,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743545939] [2021-11-09 08:41:58,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:41:58,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:58,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:41:58,670 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:41:58,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 08:41:58,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:41:58,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:41:58,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-09 08:41:58,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:41:58,906 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 10 treesize of output 8 [2021-11-09 08:41:59,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:59,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:59,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:41:59,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 42 [2021-11-09 08:41:59,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:59,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:41:59,956 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-11-09 08:41:59,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 63 treesize of output 48 [2021-11-09 08:42:00,544 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-09 08:42:00,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 24 [2021-11-09 08:42:00,658 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:00,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743545939] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:00,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:42:00,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 35 [2021-11-09 08:42:00,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706969744] [2021-11-09 08:42:00,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-09 08:42:00,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:00,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-09 08:42:00,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 08:42:00,660 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 35 states have internal predecessors, (66), 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) [2021-11-09 08:42:03,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:42:03,034 INFO L93 Difference]: Finished difference Result 87 states and 102 transitions. [2021-11-09 08:42:03,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-09 08:42:03,034 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 35 states have internal predecessors, (66), 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 36 [2021-11-09 08:42:03,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:42:03,036 INFO L225 Difference]: With dead ends: 87 [2021-11-09 08:42:03,036 INFO L226 Difference]: Without dead ends: 81 [2021-11-09 08:42:03,038 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=459, Invalid=3081, Unknown=0, NotChecked=0, Total=3540 [2021-11-09 08:42:03,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-09 08:42:03,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2021-11-09 08:42:03,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 61 states have internal predecessors, (75), 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) [2021-11-09 08:42:03,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2021-11-09 08:42:03,048 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 36 [2021-11-09 08:42:03,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:42:03,049 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2021-11-09 08:42:03,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 35 states have internal predecessors, (66), 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) [2021-11-09 08:42:03,049 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2021-11-09 08:42:03,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-09 08:42:03,051 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:42:03,051 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:42:03,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 08:42:03,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:03,266 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:42:03,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:03,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1336676186, now seen corresponding path program 1 times [2021-11-09 08:42:03,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:03,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270409701] [2021-11-09 08:42:03,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:03,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:03,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:04,287 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:04,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:04,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270409701] [2021-11-09 08:42:04,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270409701] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:04,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062543579] [2021-11-09 08:42:04,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:04,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:04,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:42:04,289 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:42:04,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 08:42:04,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:04,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-09 08:42:04,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:42:04,529 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 10 treesize of output 8 [2021-11-09 08:42:05,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:05,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:05,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:42:05,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2021-11-09 08:42:05,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:05,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:42:05,414 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-11-09 08:42:05,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 59 treesize of output 48 [2021-11-09 08:42:05,912 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-09 08:42:05,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 26 [2021-11-09 08:42:05,963 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:05,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062543579] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:05,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:42:05,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 35 [2021-11-09 08:42:05,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584284545] [2021-11-09 08:42:05,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-09 08:42:05,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:05,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-09 08:42:05,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 08:42:05,967 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 35 states have internal predecessors, (66), 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) [2021-11-09 08:42:09,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:42:09,996 INFO L93 Difference]: Finished difference Result 106 states and 126 transitions. [2021-11-09 08:42:09,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-09 08:42:09,997 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 35 states have internal predecessors, (66), 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 36 [2021-11-09 08:42:09,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:42:09,998 INFO L225 Difference]: With dead ends: 106 [2021-11-09 08:42:09,998 INFO L226 Difference]: Without dead ends: 100 [2021-11-09 08:42:10,000 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=454, Invalid=2968, Unknown=0, NotChecked=0, Total=3422 [2021-11-09 08:42:10,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-09 08:42:10,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 62. [2021-11-09 08:42:10,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 61 states have internal predecessors, (75), 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) [2021-11-09 08:42:10,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2021-11-09 08:42:10,011 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 36 [2021-11-09 08:42:10,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:42:10,011 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2021-11-09 08:42:10,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 35 states have internal predecessors, (66), 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) [2021-11-09 08:42:10,012 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2021-11-09 08:42:10,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-09 08:42:10,013 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:42:10,013 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:42:10,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 08:42:10,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:10,230 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:42:10,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:10,230 INFO L85 PathProgramCache]: Analyzing trace with hash -823597794, now seen corresponding path program 2 times [2021-11-09 08:42:10,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:10,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563422219] [2021-11-09 08:42:10,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:10,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:10,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:11,278 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:11,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:11,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563422219] [2021-11-09 08:42:11,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563422219] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:11,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185730711] [2021-11-09 08:42:11,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:42:11,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:11,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:42:11,286 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:42:11,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 08:42:11,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:42:11,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:42:11,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-09 08:42:11,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:42:11,586 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 10 treesize of output 8 [2021-11-09 08:42:12,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:12,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:12,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:42:12,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 42 [2021-11-09 08:42:12,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:12,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:42:12,508 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-11-09 08:42:12,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 63 treesize of output 48 [2021-11-09 08:42:12,946 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-09 08:42:12,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 26 [2021-11-09 08:42:13,030 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:13,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185730711] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:13,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:42:13,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18] total 37 [2021-11-09 08:42:13,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229093440] [2021-11-09 08:42:13,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-09 08:42:13,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:13,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-09 08:42:13,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1171, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 08:42:13,034 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 37 states have internal predecessors, (66), 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) [2021-11-09 08:42:14,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:42:14,949 INFO L93 Difference]: Finished difference Result 137 states and 164 transitions. [2021-11-09 08:42:14,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-09 08:42:14,950 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 37 states have internal predecessors, (66), 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 36 [2021-11-09 08:42:14,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:42:14,951 INFO L225 Difference]: With dead ends: 137 [2021-11-09 08:42:14,951 INFO L226 Difference]: Without dead ends: 131 [2021-11-09 08:42:14,953 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=430, Invalid=2876, Unknown=0, NotChecked=0, Total=3306 [2021-11-09 08:42:14,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-09 08:42:14,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 67. [2021-11-09 08:42:14,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.2424242424242424) internal successors, (82), 66 states have internal predecessors, (82), 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) [2021-11-09 08:42:14,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 82 transitions. [2021-11-09 08:42:14,966 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 82 transitions. Word has length 36 [2021-11-09 08:42:14,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:42:14,967 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 82 transitions. [2021-11-09 08:42:14,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 37 states have internal predecessors, (66), 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) [2021-11-09 08:42:14,967 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 82 transitions. [2021-11-09 08:42:14,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-09 08:42:14,969 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:42:14,969 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:42:15,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 08:42:15,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 08:42:15,194 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:42:15,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:15,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1477224796, now seen corresponding path program 2 times [2021-11-09 08:42:15,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:15,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350697875] [2021-11-09 08:42:15,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:15,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:15,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:16,078 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:16,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:16,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350697875] [2021-11-09 08:42:16,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350697875] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:16,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507097370] [2021-11-09 08:42:16,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:42:16,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:16,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:42:16,090 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:42:16,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 08:42:16,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:42:16,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:42:16,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-09 08:42:16,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:42:16,427 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 10 treesize of output 8 [2021-11-09 08:42:17,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:17,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:17,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:42:17,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2021-11-09 08:42:17,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:17,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:42:17,290 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-11-09 08:42:17,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 59 treesize of output 48 [2021-11-09 08:42:17,705 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-09 08:42:17,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 24 [2021-11-09 08:42:17,745 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:17,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507097370] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:17,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:42:17,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18] total 37 [2021-11-09 08:42:17,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838907331] [2021-11-09 08:42:17,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-09 08:42:17,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:17,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-09 08:42:17,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1184, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 08:42:17,747 INFO L87 Difference]: Start difference. First operand 67 states and 82 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 37 states have internal predecessors, (66), 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) [2021-11-09 08:42:21,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:42:21,125 INFO L93 Difference]: Finished difference Result 139 states and 166 transitions. [2021-11-09 08:42:21,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-09 08:42:21,126 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 37 states have internal predecessors, (66), 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 36 [2021-11-09 08:42:21,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:42:21,127 INFO L225 Difference]: With dead ends: 139 [2021-11-09 08:42:21,127 INFO L226 Difference]: Without dead ends: 133 [2021-11-09 08:42:21,129 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=482, Invalid=3424, Unknown=0, NotChecked=0, Total=3906 [2021-11-09 08:42:21,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-09 08:42:21,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 60. [2021-11-09 08:42:21,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 59 states have internal predecessors, (73), 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) [2021-11-09 08:42:21,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2021-11-09 08:42:21,140 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 36 [2021-11-09 08:42:21,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:42:21,141 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2021-11-09 08:42:21,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 37 states have internal predecessors, (66), 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) [2021-11-09 08:42:21,141 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2021-11-09 08:42:21,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-09 08:42:21,143 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:42:21,143 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:42:21,174 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-09 08:42:21,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-09 08:42:21,354 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:42:21,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:21,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1221475966, now seen corresponding path program 5 times [2021-11-09 08:42:21,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:21,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784776613] [2021-11-09 08:42:21,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:21,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:21,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:21,453 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:42:21,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:21,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784776613] [2021-11-09 08:42:21,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784776613] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:21,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069103762] [2021-11-09 08:42:21,454 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:42:21,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:21,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:42:21,456 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:42:21,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 08:42:21,838 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-09 08:42:21,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:42:21,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 08:42:21,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:42:22,053 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:42:22,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069103762] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:22,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:42:22,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-11-09 08:42:22,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678780515] [2021-11-09 08:42:22,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 08:42:22,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:22,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 08:42:22,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:42:22,059 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 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) [2021-11-09 08:42:22,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:42:22,235 INFO L93 Difference]: Finished difference Result 122 states and 142 transitions. [2021-11-09 08:42:22,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 08:42:22,236 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 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 38 [2021-11-09 08:42:22,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:42:22,237 INFO L225 Difference]: With dead ends: 122 [2021-11-09 08:42:22,237 INFO L226 Difference]: Without dead ends: 92 [2021-11-09 08:42:22,238 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-11-09 08:42:22,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-09 08:42:22,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 70. [2021-11-09 08:42:22,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 69 states have internal predecessors, (83), 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) [2021-11-09 08:42:22,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2021-11-09 08:42:22,265 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 38 [2021-11-09 08:42:22,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:42:22,266 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2021-11-09 08:42:22,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 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) [2021-11-09 08:42:22,266 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2021-11-09 08:42:22,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-09 08:42:22,269 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:42:22,269 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:42:22,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 08:42:22,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-09 08:42:22,486 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:42:22,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:22,486 INFO L85 PathProgramCache]: Analyzing trace with hash 716221968, now seen corresponding path program 6 times [2021-11-09 08:42:22,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:22,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620022314] [2021-11-09 08:42:22,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:22,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:22,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:22,582 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:42:22,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:22,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620022314] [2021-11-09 08:42:22,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620022314] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:22,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864001682] [2021-11-09 08:42:22,583 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:42:22,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:22,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:42:22,586 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:42:22,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 08:42:23,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-09 08:42:23,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:42:23,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 08:42:23,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:42:23,270 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:42:23,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864001682] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:23,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:42:23,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-11-09 08:42:23,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422631309] [2021-11-09 08:42:23,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 08:42:23,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:23,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 08:42:23,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:42:23,272 INFO L87 Difference]: Start difference. First operand 70 states and 83 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 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) [2021-11-09 08:42:23,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:42:23,463 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2021-11-09 08:42:23,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 08:42:23,463 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 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 43 [2021-11-09 08:42:23,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:42:23,464 INFO L225 Difference]: With dead ends: 81 [2021-11-09 08:42:23,464 INFO L226 Difference]: Without dead ends: 71 [2021-11-09 08:42:23,465 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-11-09 08:42:23,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-09 08:42:23,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2021-11-09 08:42:23,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 47 states have internal predecessors, (56), 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) [2021-11-09 08:42:23,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2021-11-09 08:42:23,475 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 43 [2021-11-09 08:42:23,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:42:23,476 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2021-11-09 08:42:23,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 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) [2021-11-09 08:42:23,476 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2021-11-09 08:42:23,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 08:42:23,478 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:42:23,478 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:42:23,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 08:42:23,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-09 08:42:23,698 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:42:23,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:23,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1851731436, now seen corresponding path program 7 times [2021-11-09 08:42:23,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:23,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47361047] [2021-11-09 08:42:23,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:23,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:23,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:25,497 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:25,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:25,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47361047] [2021-11-09 08:42:25,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47361047] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:25,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538843217] [2021-11-09 08:42:25,498 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:42:25,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:25,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:42:25,499 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:42:25,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 08:42:25,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:25,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-09 08:42:25,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:42:25,920 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 10 treesize of output 8 [2021-11-09 08:42:27,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:27,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:27,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:27,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:42:27,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:27,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 54 [2021-11-09 08:42:27,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:42:27,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:27,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:27,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:27,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:27,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 66 [2021-11-09 08:42:27,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:27,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:42:27,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:27,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:27,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:27,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:42:27,717 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-11-09 08:42:27,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 105 treesize of output 74 [2021-11-09 08:42:28,717 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-09 08:42:28,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 99 treesize of output 35 [2021-11-09 08:42:28,972 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:28,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538843217] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:28,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:42:28,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24] total 49 [2021-11-09 08:42:28,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907119614] [2021-11-09 08:42:28,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-09 08:42:28,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:28,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-09 08:42:28,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=2160, Unknown=0, NotChecked=0, Total=2352 [2021-11-09 08:42:28,975 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 49 states, 49 states have (on average 1.7959183673469388) internal successors, (88), 49 states have internal predecessors, (88), 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) [2021-11-09 08:42:35,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:42:35,695 INFO L93 Difference]: Finished difference Result 158 states and 188 transitions. [2021-11-09 08:42:35,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-09 08:42:35,696 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7959183673469388) internal successors, (88), 49 states have internal predecessors, (88), 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 47 [2021-11-09 08:42:35,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:42:35,697 INFO L225 Difference]: With dead ends: 158 [2021-11-09 08:42:35,698 INFO L226 Difference]: Without dead ends: 152 [2021-11-09 08:42:35,703 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3331 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=1073, Invalid=10057, Unknown=0, NotChecked=0, Total=11130 [2021-11-09 08:42:35,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-09 08:42:35,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 109. [2021-11-09 08:42:35,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.25) internal successors, (135), 108 states have internal predecessors, (135), 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) [2021-11-09 08:42:35,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 135 transitions. [2021-11-09 08:42:35,722 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 135 transitions. Word has length 47 [2021-11-09 08:42:35,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:42:35,722 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 135 transitions. [2021-11-09 08:42:35,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7959183673469388) internal successors, (88), 49 states have internal predecessors, (88), 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) [2021-11-09 08:42:35,723 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 135 transitions. [2021-11-09 08:42:35,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 08:42:35,724 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:42:35,724 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:42:35,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 08:42:35,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-09 08:42:35,938 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:42:35,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:35,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1632876718, now seen corresponding path program 3 times [2021-11-09 08:42:35,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:35,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589112353] [2021-11-09 08:42:35,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:35,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:35,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:37,531 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:37,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:37,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589112353] [2021-11-09 08:42:37,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589112353] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:37,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828466344] [2021-11-09 08:42:37,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:42:37,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:37,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:42:37,533 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:42:37,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 08:42:38,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 08:42:38,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:42:38,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-09 08:42:38,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:42:38,113 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 10 treesize of output 8 [2021-11-09 08:42:39,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:42:39,615 INFO L354 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2021-11-09 08:42:39,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 78 treesize of output 70 [2021-11-09 08:42:39,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:39,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:39,938 INFO L354 Elim1Store]: treesize reduction 75, result has 1.3 percent of original size [2021-11-09 08:42:39,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 93 treesize of output 91 [2021-11-09 08:42:40,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:40,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:40,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:40,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:42:40,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:40,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:42:40,412 INFO L354 Elim1Store]: treesize reduction 279, result has 9.7 percent of original size [2021-11-09 08:42:40,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 24 case distinctions, treesize of input 130 treesize of output 111 [2021-11-09 08:42:42,438 INFO L354 Elim1Store]: treesize reduction 264, result has 12.3 percent of original size [2021-11-09 08:42:42,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 136 treesize of output 84 [2021-11-09 08:42:44,179 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:44,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828466344] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:44,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:42:44,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30] total 55 [2021-11-09 08:42:44,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280518583] [2021-11-09 08:42:44,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-09 08:42:44,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:44,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-09 08:42:44,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=2723, Unknown=0, NotChecked=0, Total=2970 [2021-11-09 08:42:44,182 INFO L87 Difference]: Start difference. First operand 109 states and 135 transitions. Second operand has 55 states, 55 states have (on average 1.6363636363636365) internal successors, (90), 55 states have internal predecessors, (90), 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) [2021-11-09 08:43:03,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:43:03,976 INFO L93 Difference]: Finished difference Result 335 states and 417 transitions. [2021-11-09 08:43:03,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-11-09 08:43:03,976 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.6363636363636365) internal successors, (90), 55 states have internal predecessors, (90), 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 47 [2021-11-09 08:43:03,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:43:03,978 INFO L225 Difference]: With dead ends: 335 [2021-11-09 08:43:03,978 INFO L226 Difference]: Without dead ends: 309 [2021-11-09 08:43:03,984 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4201 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=1355, Invalid=13165, Unknown=0, NotChecked=0, Total=14520 [2021-11-09 08:43:03,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-11-09 08:43:04,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 132. [2021-11-09 08:43:04,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.2595419847328244) internal successors, (165), 131 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:43:04,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 165 transitions. [2021-11-09 08:43:04,004 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 165 transitions. Word has length 47 [2021-11-09 08:43:04,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:43:04,004 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 165 transitions. [2021-11-09 08:43:04,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.6363636363636365) internal successors, (90), 55 states have internal predecessors, (90), 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) [2021-11-09 08:43:04,004 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 165 transitions. [2021-11-09 08:43:04,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 08:43:04,005 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:43:04,005 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:43:04,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 08:43:04,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-09 08:43:04,206 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:43:04,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:43:04,207 INFO L85 PathProgramCache]: Analyzing trace with hash -465528042, now seen corresponding path program 4 times [2021-11-09 08:43:04,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:43:04,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137948390] [2021-11-09 08:43:04,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:43:04,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:43:04,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:05,914 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:43:05,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:43:05,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137948390] [2021-11-09 08:43:05,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137948390] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:43:05,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28478065] [2021-11-09 08:43:05,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:43:05,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:43:05,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:43:05,915 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:43:05,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 08:43:06,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:43:06,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:43:06,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-09 08:43:06,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:43:06,570 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 10 treesize of output 8 [2021-11-09 08:43:07,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:07,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:07,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:07,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:43:07,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:07,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 54 [2021-11-09 08:43:07,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:43:07,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:07,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:07,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:07,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:07,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 74 [2021-11-09 08:43:08,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:08,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:43:08,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:08,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:08,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:08,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:43:08,218 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-11-09 08:43:08,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 117 treesize of output 78 [2021-11-09 08:43:09,382 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-09 08:43:09,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 109 treesize of output 37 [2021-11-09 08:43:09,468 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:43:09,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28478065] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:43:09,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:43:09,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 24] total 50 [2021-11-09 08:43:09,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051251136] [2021-11-09 08:43:09,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-09 08:43:09,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:43:09,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-09 08:43:09,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=2227, Unknown=0, NotChecked=0, Total=2450 [2021-11-09 08:43:09,471 INFO L87 Difference]: Start difference. First operand 132 states and 165 transitions. Second operand has 50 states, 50 states have (on average 1.76) internal successors, (88), 50 states have internal predecessors, (88), 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) [2021-11-09 08:43:15,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:43:15,282 INFO L93 Difference]: Finished difference Result 221 states and 268 transitions. [2021-11-09 08:43:15,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-09 08:43:15,283 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.76) internal successors, (88), 50 states have internal predecessors, (88), 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 47 [2021-11-09 08:43:15,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:43:15,284 INFO L225 Difference]: With dead ends: 221 [2021-11-09 08:43:15,285 INFO L226 Difference]: Without dead ends: 215 [2021-11-09 08:43:15,288 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2195 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=691, Invalid=6281, Unknown=0, NotChecked=0, Total=6972 [2021-11-09 08:43:15,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-11-09 08:43:15,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 139. [2021-11-09 08:43:15,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.2681159420289856) internal successors, (175), 138 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:43:15,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 175 transitions. [2021-11-09 08:43:15,317 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 175 transitions. Word has length 47 [2021-11-09 08:43:15,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:43:15,318 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 175 transitions. [2021-11-09 08:43:15,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.76) internal successors, (88), 50 states have internal predecessors, (88), 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) [2021-11-09 08:43:15,318 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 175 transitions. [2021-11-09 08:43:15,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 08:43:15,319 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:43:15,320 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:43:15,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 08:43:15,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-09 08:43:15,546 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:43:15,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:43:15,546 INFO L85 PathProgramCache]: Analyzing trace with hash -246673324, now seen corresponding path program 5 times [2021-11-09 08:43:15,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:43:15,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120287567] [2021-11-09 08:43:15,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:43:15,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:43:15,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:17,298 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:43:17,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:43:17,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120287567] [2021-11-09 08:43:17,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120287567] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:43:17,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796098865] [2021-11-09 08:43:17,299 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:43:17,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:43:17,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:43:17,300 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:43:17,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 08:43:18,018 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-09 08:43:18,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:43:18,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-09 08:43:18,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:43:18,059 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 10 treesize of output 8 [2021-11-09 08:43:19,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:19,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:19,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:19,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:43:19,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:19,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 54 [2021-11-09 08:43:19,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:43:19,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:19,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:19,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:19,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:19,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 74 [2021-11-09 08:43:19,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:19,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:43:19,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:19,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:19,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:19,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:43:19,519 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-11-09 08:43:19,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 93 treesize of output 74 [2021-11-09 08:43:20,421 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-09 08:43:20,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 111 treesize of output 39 [2021-11-09 08:43:20,488 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:43:20,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796098865] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:43:20,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:43:20,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24] total 49 [2021-11-09 08:43:20,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501858271] [2021-11-09 08:43:20,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-09 08:43:20,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:43:20,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-09 08:43:20,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=2131, Unknown=0, NotChecked=0, Total=2352 [2021-11-09 08:43:20,490 INFO L87 Difference]: Start difference. First operand 139 states and 175 transitions. Second operand has 49 states, 49 states have (on average 1.7959183673469388) internal successors, (88), 49 states have internal predecessors, (88), 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) [2021-11-09 08:43:30,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:43:30,738 INFO L93 Difference]: Finished difference Result 177 states and 217 transitions. [2021-11-09 08:43:30,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-09 08:43:30,739 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7959183673469388) internal successors, (88), 49 states have internal predecessors, (88), 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 47 [2021-11-09 08:43:30,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:43:30,740 INFO L225 Difference]: With dead ends: 177 [2021-11-09 08:43:30,740 INFO L226 Difference]: Without dead ends: 171 [2021-11-09 08:43:30,742 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1838 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=602, Invalid=5403, Unknown=1, NotChecked=0, Total=6006 [2021-11-09 08:43:30,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-09 08:43:30,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 139. [2021-11-09 08:43:30,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.2681159420289856) internal successors, (175), 138 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:43:30,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 175 transitions. [2021-11-09 08:43:30,787 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 175 transitions. Word has length 47 [2021-11-09 08:43:30,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:43:30,788 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 175 transitions. [2021-11-09 08:43:30,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7959183673469388) internal successors, (88), 49 states have internal predecessors, (88), 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) [2021-11-09 08:43:30,789 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 175 transitions. [2021-11-09 08:43:30,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 08:43:30,790 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:43:30,790 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:43:30,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 08:43:31,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:43:31,014 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:43:31,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:43:31,014 INFO L85 PathProgramCache]: Analyzing trace with hash 2048869074, now seen corresponding path program 6 times [2021-11-09 08:43:31,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:43:31,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050001358] [2021-11-09 08:43:31,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:43:31,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:43:31,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:32,636 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:43:32,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:43:32,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050001358] [2021-11-09 08:43:32,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050001358] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:43:32,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088907373] [2021-11-09 08:43:32,636 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:43:32,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:43:32,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:43:32,638 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:43:32,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 08:43:33,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-09 08:43:33,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:43:33,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-09 08:43:33,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:43:33,621 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 10 treesize of output 8 [2021-11-09 08:43:34,828 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 08:43:34,828 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:43:34,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-11-09 08:43:34,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471584774] [2021-11-09 08:43:34,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-09 08:43:34,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:43:34,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-09 08:43:34,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1397, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 08:43:34,831 INFO L87 Difference]: Start difference. First operand 139 states and 175 transitions. Second operand has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 states have internal predecessors, (47), 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) [2021-11-09 08:43:37,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:43:37,438 INFO L93 Difference]: Finished difference Result 232 states and 283 transitions. [2021-11-09 08:43:37,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-09 08:43:37,439 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 states have internal predecessors, (47), 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 47 [2021-11-09 08:43:37,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:43:37,440 INFO L225 Difference]: With dead ends: 232 [2021-11-09 08:43:37,440 INFO L226 Difference]: Without dead ends: 228 [2021-11-09 08:43:37,441 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=407, Invalid=3625, Unknown=0, NotChecked=0, Total=4032 [2021-11-09 08:43:37,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-11-09 08:43:37,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 153. [2021-11-09 08:43:37,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.2763157894736843) internal successors, (194), 152 states have internal predecessors, (194), 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) [2021-11-09 08:43:37,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 194 transitions. [2021-11-09 08:43:37,475 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 194 transitions. Word has length 47 [2021-11-09 08:43:37,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:43:37,475 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 194 transitions. [2021-11-09 08:43:37,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 states have internal predecessors, (47), 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) [2021-11-09 08:43:37,475 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 194 transitions. [2021-11-09 08:43:37,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 08:43:37,476 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:43:37,476 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:43:37,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 08:43:37,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 08:43:37,678 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:43:37,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:43:37,678 INFO L85 PathProgramCache]: Analyzing trace with hash -2027243504, now seen corresponding path program 7 times [2021-11-09 08:43:37,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:43:37,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625028153] [2021-11-09 08:43:37,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:43:37,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:43:37,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:39,552 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:43:39,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:43:39,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625028153] [2021-11-09 08:43:39,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625028153] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:43:39,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434479197] [2021-11-09 08:43:39,553 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:43:39,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:43:39,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:43:39,554 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:43:39,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 08:43:40,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:40,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-09 08:43:40,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:43:40,597 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 10 treesize of output 8 [2021-11-09 08:43:41,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:41,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:41,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:41,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:43:41,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:41,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 54 [2021-11-09 08:43:41,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:43:41,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:41,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:41,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:41,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:41,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 76 [2021-11-09 08:43:42,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:42,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:43:42,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:42,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:42,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:42,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:43:42,248 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-11-09 08:43:42,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 103 treesize of output 74 [2021-11-09 08:43:43,158 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-09 08:43:43,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 107 treesize of output 39 [2021-11-09 08:43:43,242 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:43:43,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434479197] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:43:43,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:43:43,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 25] total 51 [2021-11-09 08:43:43,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326020077] [2021-11-09 08:43:43,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-09 08:43:43,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:43:43,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-09 08:43:43,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=2319, Unknown=0, NotChecked=0, Total=2550 [2021-11-09 08:43:43,245 INFO L87 Difference]: Start difference. First operand 153 states and 194 transitions. Second operand has 51 states, 51 states have (on average 1.7254901960784315) internal successors, (88), 51 states have internal predecessors, (88), 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) [2021-11-09 08:43:49,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:43:49,630 INFO L93 Difference]: Finished difference Result 234 states and 287 transitions. [2021-11-09 08:43:49,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-09 08:43:49,631 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.7254901960784315) internal successors, (88), 51 states have internal predecessors, (88), 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 47 [2021-11-09 08:43:49,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:43:49,632 INFO L225 Difference]: With dead ends: 234 [2021-11-09 08:43:49,633 INFO L226 Difference]: Without dead ends: 228 [2021-11-09 08:43:49,634 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2059 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=621, Invalid=5859, Unknown=0, NotChecked=0, Total=6480 [2021-11-09 08:43:49,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-11-09 08:43:49,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 160. [2021-11-09 08:43:49,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.2830188679245282) internal successors, (204), 159 states have internal predecessors, (204), 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) [2021-11-09 08:43:49,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 204 transitions. [2021-11-09 08:43:49,662 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 204 transitions. Word has length 47 [2021-11-09 08:43:49,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:43:49,662 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 204 transitions. [2021-11-09 08:43:49,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.7254901960784315) internal successors, (88), 51 states have internal predecessors, (88), 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) [2021-11-09 08:43:49,663 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 204 transitions. [2021-11-09 08:43:49,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 08:43:49,664 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:43:49,664 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:43:49,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-09 08:43:49,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:43:49,882 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:43:49,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:43:49,882 INFO L85 PathProgramCache]: Analyzing trace with hash -859894828, now seen corresponding path program 8 times [2021-11-09 08:43:49,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:43:49,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058296044] [2021-11-09 08:43:49,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:43:49,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:43:49,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:51,543 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:43:51,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:43:51,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058296044] [2021-11-09 08:43:51,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058296044] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:43:51,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255386873] [2021-11-09 08:43:51,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:43:51,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:43:51,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:43:51,544 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:43:51,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-09 08:43:52,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:43:52,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:43:52,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-09 08:43:52,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:43:52,696 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 10 treesize of output 8 [2021-11-09 08:43:53,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:53,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:53,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:53,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:43:53,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:53,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 54 [2021-11-09 08:43:54,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:43:54,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:54,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:54,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:54,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:54,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 64 [2021-11-09 08:43:54,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:54,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:43:54,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:54,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:54,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:54,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:43:54,329 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-11-09 08:43:54,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 117 treesize of output 78 [2021-11-09 08:43:55,257 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-09 08:43:55,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 111 treesize of output 39 [2021-11-09 08:43:55,339 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:43:55,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255386873] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:43:55,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:43:55,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 25] total 51 [2021-11-09 08:43:55,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727048918] [2021-11-09 08:43:55,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-09 08:43:55,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:43:55,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-09 08:43:55,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=2317, Unknown=0, NotChecked=0, Total=2550 [2021-11-09 08:43:55,341 INFO L87 Difference]: Start difference. First operand 160 states and 204 transitions. Second operand has 51 states, 51 states have (on average 1.7254901960784315) internal successors, (88), 51 states have internal predecessors, (88), 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) [2021-11-09 08:44:00,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:44:00,546 INFO L93 Difference]: Finished difference Result 263 states and 324 transitions. [2021-11-09 08:44:00,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-09 08:44:00,547 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.7254901960784315) internal successors, (88), 51 states have internal predecessors, (88), 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 47 [2021-11-09 08:44:00,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:44:00,548 INFO L225 Difference]: With dead ends: 263 [2021-11-09 08:44:00,548 INFO L226 Difference]: Without dead ends: 257 [2021-11-09 08:44:00,549 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2091 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=624, Invalid=5856, Unknown=0, NotChecked=0, Total=6480 [2021-11-09 08:44:00,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-11-09 08:44:00,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 165. [2021-11-09 08:44:00,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.2865853658536586) internal successors, (211), 164 states have internal predecessors, (211), 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) [2021-11-09 08:44:00,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 211 transitions. [2021-11-09 08:44:00,583 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 211 transitions. Word has length 47 [2021-11-09 08:44:00,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:44:00,583 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 211 transitions. [2021-11-09 08:44:00,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.7254901960784315) internal successors, (88), 51 states have internal predecessors, (88), 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) [2021-11-09 08:44:00,584 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 211 transitions. [2021-11-09 08:44:00,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 08:44:00,584 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:44:00,584 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:44:00,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-09 08:44:00,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:44:00,785 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:44:00,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:44:00,785 INFO L85 PathProgramCache]: Analyzing trace with hash -641040110, now seen corresponding path program 3 times [2021-11-09 08:44:00,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:44:00,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840640323] [2021-11-09 08:44:00,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:44:00,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:44:00,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:44:02,306 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:44:02,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:44:02,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840640323] [2021-11-09 08:44:02,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840640323] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:44:02,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616530529] [2021-11-09 08:44:02,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:44:02,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:44:02,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:44:02,308 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:44:02,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-09 08:44:03,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 08:44:03,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:44:03,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-09 08:44:03,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:44:03,392 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 10 treesize of output 8 [2021-11-09 08:44:04,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:44:04,787 INFO L354 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2021-11-09 08:44:04,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 66 treesize of output 67 [2021-11-09 08:44:05,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:05,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:05,129 INFO L354 Elim1Store]: treesize reduction 75, result has 1.3 percent of original size [2021-11-09 08:44:05,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 79 treesize of output 86 [2021-11-09 08:44:05,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:05,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:05,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:05,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:44:05,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:05,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:44:05,544 INFO L354 Elim1Store]: treesize reduction 285, result has 7.8 percent of original size [2021-11-09 08:44:05,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 24 case distinctions, treesize of input 119 treesize of output 102 [2021-11-09 08:44:07,074 INFO L354 Elim1Store]: treesize reduction 165, result has 17.1 percent of original size [2021-11-09 08:44:07,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 116 treesize of output 79 [2021-11-09 08:44:08,219 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:44:08,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616530529] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:44:08,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:44:08,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30] total 56 [2021-11-09 08:44:08,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612406653] [2021-11-09 08:44:08,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-09 08:44:08,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:44:08,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-09 08:44:08,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=2844, Unknown=0, NotChecked=0, Total=3080 [2021-11-09 08:44:08,222 INFO L87 Difference]: Start difference. First operand 165 states and 211 transitions. Second operand has 56 states, 56 states have (on average 1.6071428571428572) internal successors, (90), 56 states have internal predecessors, (90), 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) [2021-11-09 08:44:24,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:44:24,379 INFO L93 Difference]: Finished difference Result 295 states and 361 transitions. [2021-11-09 08:44:24,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-09 08:44:24,379 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.6071428571428572) internal successors, (90), 56 states have internal predecessors, (90), 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 47 [2021-11-09 08:44:24,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:44:24,381 INFO L225 Difference]: With dead ends: 295 [2021-11-09 08:44:24,381 INFO L226 Difference]: Without dead ends: 269 [2021-11-09 08:44:24,383 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3772 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=1218, Invalid=11438, Unknown=0, NotChecked=0, Total=12656 [2021-11-09 08:44:24,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-11-09 08:44:24,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 169. [2021-11-09 08:44:24,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.2916666666666667) internal successors, (217), 168 states have internal predecessors, (217), 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) [2021-11-09 08:44:24,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 217 transitions. [2021-11-09 08:44:24,409 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 217 transitions. Word has length 47 [2021-11-09 08:44:24,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:44:24,409 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 217 transitions. [2021-11-09 08:44:24,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.6071428571428572) internal successors, (90), 56 states have internal predecessors, (90), 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) [2021-11-09 08:44:24,410 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 217 transitions. [2021-11-09 08:44:24,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-09 08:44:24,411 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:44:24,411 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:44:24,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-09 08:44:24,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:44:24,618 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:44:24,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:44:24,618 INFO L85 PathProgramCache]: Analyzing trace with hash -642615304, now seen corresponding path program 9 times [2021-11-09 08:44:24,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:44:24,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995621862] [2021-11-09 08:44:24,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:44:24,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:44:24,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:44:24,734 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 08:44:24,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:44:24,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995621862] [2021-11-09 08:44:24,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995621862] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:44:24,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089494160] [2021-11-09 08:44:24,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:44:24,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:44:24,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:44:24,738 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:44:24,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-09 08:44:25,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-09 08:44:25,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:44:25,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 08:44:25,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:44:26,148 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-09 08:44:26,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089494160] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:44:26,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:44:26,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-11-09 08:44:26,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235339314] [2021-11-09 08:44:26,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 08:44:26,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:44:26,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 08:44:26,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-11-09 08:44:26,149 INFO L87 Difference]: Start difference. First operand 169 states and 217 transitions. Second operand has 16 states, 16 states have (on average 4.4375) internal successors, (71), 16 states have internal predecessors, (71), 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) [2021-11-09 08:44:26,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:44:26,342 INFO L93 Difference]: Finished difference Result 294 states and 359 transitions. [2021-11-09 08:44:26,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 08:44:26,343 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.4375) internal successors, (71), 16 states have internal predecessors, (71), 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 49 [2021-11-09 08:44:26,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:44:26,344 INFO L225 Difference]: With dead ends: 294 [2021-11-09 08:44:26,344 INFO L226 Difference]: Without dead ends: 242 [2021-11-09 08:44:26,345 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-11-09 08:44:26,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-11-09 08:44:26,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 157. [2021-11-09 08:44:26,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.2371794871794872) internal successors, (193), 156 states have internal predecessors, (193), 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) [2021-11-09 08:44:26,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 193 transitions. [2021-11-09 08:44:26,379 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 193 transitions. Word has length 49 [2021-11-09 08:44:26,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:44:26,379 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 193 transitions. [2021-11-09 08:44:26,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.4375) internal successors, (71), 16 states have internal predecessors, (71), 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) [2021-11-09 08:44:26,380 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 193 transitions. [2021-11-09 08:44:26,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-09 08:44:26,380 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:44:26,380 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:44:26,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-09 08:44:26,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-09 08:44:26,581 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:44:26,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:44:26,581 INFO L85 PathProgramCache]: Analyzing trace with hash 372705376, now seen corresponding path program 10 times [2021-11-09 08:44:26,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:44:26,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568529503] [2021-11-09 08:44:26,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:44:26,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:44:26,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:44:26,698 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 08:44:26,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:44:26,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568529503] [2021-11-09 08:44:26,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568529503] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:44:26,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483156308] [2021-11-09 08:44:26,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:44:26,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:44:26,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:44:26,700 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:44:26,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-09 08:44:27,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:44:27,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:44:27,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 08:44:27,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:44:28,070 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 08:44:28,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483156308] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:44:28,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:44:28,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-11-09 08:44:28,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532360292] [2021-11-09 08:44:28,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 08:44:28,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:44:28,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 08:44:28,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-11-09 08:44:28,072 INFO L87 Difference]: Start difference. First operand 157 states and 193 transitions. Second operand has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 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) [2021-11-09 08:44:28,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:44:28,337 INFO L93 Difference]: Finished difference Result 170 states and 206 transitions. [2021-11-09 08:44:28,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 08:44:28,338 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 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 54 [2021-11-09 08:44:28,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:44:28,339 INFO L225 Difference]: With dead ends: 170 [2021-11-09 08:44:28,339 INFO L226 Difference]: Without dead ends: 158 [2021-11-09 08:44:28,340 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-11-09 08:44:28,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-09 08:44:28,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 59. [2021-11-09 08:44:28,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1896551724137931) internal successors, (69), 58 states have internal predecessors, (69), 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) [2021-11-09 08:44:28,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2021-11-09 08:44:28,366 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 54 [2021-11-09 08:44:28,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:44:28,366 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2021-11-09 08:44:28,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 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) [2021-11-09 08:44:28,366 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2021-11-09 08:44:28,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-09 08:44:28,367 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:44:28,367 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:44:28,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-09 08:44:28,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:44:28,582 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:44:28,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:44:28,582 INFO L85 PathProgramCache]: Analyzing trace with hash -939836764, now seen corresponding path program 8 times [2021-11-09 08:44:28,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:44:28,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929463714] [2021-11-09 08:44:28,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:44:28,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:44:28,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:44:30,457 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:44:30,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:44:30,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929463714] [2021-11-09 08:44:30,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929463714] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:44:30,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307310369] [2021-11-09 08:44:30,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:44:30,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:44:30,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:44:30,459 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:44:30,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-09 08:44:31,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:44:31,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:44:31,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-09 08:44:31,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:44:31,643 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 10 treesize of output 8 [2021-11-09 08:44:33,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:33,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:33,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:33,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:33,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:44:33,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:33,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:33,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:33,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 66 [2021-11-09 08:44:33,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:44:33,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:33,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:33,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:33,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:33,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:33,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:33,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:33,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 76 [2021-11-09 08:44:33,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:33,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:33,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:33,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:33,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:33,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:33,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:33,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:33,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:33,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:44:33,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:33,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 92 [2021-11-09 08:44:33,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:33,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:33,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:33,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:44:33,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:33,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:33,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:33,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:33,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:33,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:44:33,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:44:33,892 INFO L354 Elim1Store]: treesize reduction 46, result has 13.2 percent of original size [2021-11-09 08:44:33,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 22 case distinctions, treesize of input 141 treesize of output 100 [2021-11-09 08:44:35,199 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-09 08:44:35,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 150 treesize of output 50 [2021-11-09 08:44:35,300 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:44:35,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307310369] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:44:35,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:44:35,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31] total 61 [2021-11-09 08:44:35,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851473826] [2021-11-09 08:44:35,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-09 08:44:35,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:44:35,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-09 08:44:35,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=3407, Unknown=0, NotChecked=0, Total=3660 [2021-11-09 08:44:35,303 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 61 states, 61 states have (on average 1.8032786885245902) internal successors, (110), 61 states have internal predecessors, (110), 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) [2021-11-09 08:44:39,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:44:39,493 INFO L93 Difference]: Finished difference Result 133 states and 156 transitions. [2021-11-09 08:44:39,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-09 08:44:39,494 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.8032786885245902) internal successors, (110), 61 states have internal predecessors, (110), 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 58 [2021-11-09 08:44:39,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:44:39,495 INFO L225 Difference]: With dead ends: 133 [2021-11-09 08:44:39,495 INFO L226 Difference]: Without dead ends: 127 [2021-11-09 08:44:39,496 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2568 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=604, Invalid=7768, Unknown=0, NotChecked=0, Total=8372 [2021-11-09 08:44:39,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-09 08:44:39,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 102. [2021-11-09 08:44:39,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.2178217821782178) internal successors, (123), 101 states have internal predecessors, (123), 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) [2021-11-09 08:44:39,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 123 transitions. [2021-11-09 08:44:39,551 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 123 transitions. Word has length 58 [2021-11-09 08:44:39,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:44:39,552 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 123 transitions. [2021-11-09 08:44:39,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.8032786885245902) internal successors, (110), 61 states have internal predecessors, (110), 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) [2021-11-09 08:44:39,552 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 123 transitions. [2021-11-09 08:44:39,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-09 08:44:39,553 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:44:39,553 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:44:39,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-09 08:44:39,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:44:39,778 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:44:39,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:44:39,778 INFO L85 PathProgramCache]: Analyzing trace with hash -877797150, now seen corresponding path program 11 times [2021-11-09 08:44:39,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:44:39,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127835142] [2021-11-09 08:44:39,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:44:39,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:44:39,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:44:41,905 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:44:41,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:44:41,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127835142] [2021-11-09 08:44:41,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127835142] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:44:41,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39065342] [2021-11-09 08:44:41,906 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:44:41,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:44:41,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:44:41,906 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:44:41,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-09 08:44:43,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-09 08:44:43,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:44:43,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-09 08:44:43,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:44:43,259 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 10 treesize of output 8 [2021-11-09 08:44:44,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:44,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:44,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:44,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:44,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:44:44,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:44,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:44,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:44,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 66 [2021-11-09 08:44:44,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:44:44,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:44,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:44,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:44,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:44,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:44,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:44,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:44,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 76 [2021-11-09 08:44:45,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:45,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:45,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:45,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:45,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:45,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:45,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:45,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:45,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:45,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:44:45,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:45,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 90 [2021-11-09 08:44:45,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:45,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:45,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:45,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:44:45,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:45,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:45,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:45,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:45,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:45,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:44:45,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:44:45,571 INFO L354 Elim1Store]: treesize reduction 46, result has 13.2 percent of original size [2021-11-09 08:44:45,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 22 case distinctions, treesize of input 147 treesize of output 104 [2021-11-09 08:44:47,000 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-09 08:44:47,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 144 treesize of output 48 [2021-11-09 08:44:47,106 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:44:47,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39065342] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:44:47,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:44:47,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 31] total 63 [2021-11-09 08:44:47,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665197503] [2021-11-09 08:44:47,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-09 08:44:47,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:44:47,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-09 08:44:47,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=3644, Unknown=0, NotChecked=0, Total=3906 [2021-11-09 08:44:47,108 INFO L87 Difference]: Start difference. First operand 102 states and 123 transitions. Second operand has 63 states, 63 states have (on average 1.746031746031746) internal successors, (110), 63 states have internal predecessors, (110), 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) [2021-11-09 08:45:03,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:45:03,471 INFO L93 Difference]: Finished difference Result 248 states and 291 transitions. [2021-11-09 08:45:03,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-11-09 08:45:03,482 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.746031746031746) internal successors, (110), 63 states have internal predecessors, (110), 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 58 [2021-11-09 08:45:03,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:45:03,484 INFO L225 Difference]: With dead ends: 248 [2021-11-09 08:45:03,484 INFO L226 Difference]: Without dead ends: 242 [2021-11-09 08:45:03,486 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5476 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=1492, Invalid=16597, Unknown=1, NotChecked=0, Total=18090 [2021-11-09 08:45:03,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-11-09 08:45:03,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 126. [2021-11-09 08:45:03,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.224) internal successors, (153), 125 states have internal predecessors, (153), 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) [2021-11-09 08:45:03,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 153 transitions. [2021-11-09 08:45:03,555 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 153 transitions. Word has length 58 [2021-11-09 08:45:03,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:45:03,556 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 153 transitions. [2021-11-09 08:45:03,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.746031746031746) internal successors, (110), 63 states have internal predecessors, (110), 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) [2021-11-09 08:45:03,556 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 153 transitions. [2021-11-09 08:45:03,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-09 08:45:03,557 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:45:03,557 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:45:03,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-09 08:45:03,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:45:03,782 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:45:03,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:45:03,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1012223322, now seen corresponding path program 12 times [2021-11-09 08:45:03,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:45:03,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924278394] [2021-11-09 08:45:03,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:45:03,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:45:03,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:45:06,039 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:45:06,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:45:06,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924278394] [2021-11-09 08:45:06,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924278394] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:45:06,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511493721] [2021-11-09 08:45:06,040 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:45:06,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:45:06,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:45:06,041 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:45:06,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5dd4434-6ab5-4bac-9704-84f0d1722304/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-09 08:45:07,466 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-09 08:45:07,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:45:07,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-09 08:45:07,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:45:07,514 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 10 treesize of output 8 [2021-11-09 08:45:09,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:09,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:09,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:09,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:09,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:45:09,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:09,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:09,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:09,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 66 [2021-11-09 08:45:09,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:45:09,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:09,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:09,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:09,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:09,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:09,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:09,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:09,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 78 [2021-11-09 08:45:09,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:09,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:09,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:09,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:09,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:09,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:45:09,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:09,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:09,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:09,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:09,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 100 [2021-11-09 08:45:10,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:10,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:10,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:10,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:45:10,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:10,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:10,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:45:10,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:10,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:45:10,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:10,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:10,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:10,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:10,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:45:10,216 INFO L354 Elim1Store]: treesize reduction 75, result has 14.8 percent of original size [2021-11-09 08:45:10,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 30 case distinctions, treesize of input 236 treesize of output 129 [2021-11-09 08:45:11,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:11,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:11,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:11,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:12,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:12,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:12,116 INFO L354 Elim1Store]: treesize reduction 178, result has 33.8 percent of original size [2021-11-09 08:45:12,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 12 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 152 treesize of output 140