./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/num_conversion_2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/num_conversion_2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL --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 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 04:39:31,538 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 04:39:31,541 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 04:39:31,583 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 04:39:31,584 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 04:39:31,586 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 04:39:31,588 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 04:39:31,592 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 04:39:31,597 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 04:39:31,602 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 04:39:31,603 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 04:39:31,606 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 04:39:31,608 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 04:39:31,613 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 04:39:31,615 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 04:39:31,620 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 04:39:31,623 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 04:39:31,629 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 04:39:31,632 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 04:39:31,638 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 04:39:31,645 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 04:39:31,647 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 04:39:31,651 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 04:39:31,653 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 04:39:31,665 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 04:39:31,671 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 04:39:31,672 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 04:39:31,674 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 04:39:31,675 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 04:39:31,677 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 04:39:31,679 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 04:39:31,680 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 04:39:31,682 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 04:39:31,685 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 04:39:31,687 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 04:39:31,687 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 04:39:31,688 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 04:39:31,689 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 04:39:31,689 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 04:39:31,690 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 04:39:31,691 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 04:39:31,692 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-19 04:39:31,754 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 04:39:31,758 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 04:39:31,759 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 04:39:31,759 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 04:39:31,760 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 04:39:31,760 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 04:39:31,761 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 04:39:31,762 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 04:39:31,762 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 04:39:31,762 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 04:39:31,764 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 04:39:31,764 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 04:39:31,764 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 04:39:31,764 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 04:39:31,765 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 04:39:31,765 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 04:39:31,765 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 04:39:31,766 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 04:39:31,766 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 04:39:31,766 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 04:39:31,766 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 04:39:31,767 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 04:39:31,767 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 04:39:31,767 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 04:39:31,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:39:31,768 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 04:39:31,768 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 04:39:31,768 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 04:39:31,769 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 04:39:31,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 04:39:31,771 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 04:39:31,771 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 04:39:31,772 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 04:39:31,772 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 04:39:31,772 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_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 [2021-11-19 04:39:32,153 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 04:39:32,180 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 04:39:32,183 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 04:39:32,185 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 04:39:32,186 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 04:39:32,187 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/bitvector/num_conversion_2.c [2021-11-19 04:39:32,292 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/data/36c9f5fa5/193112807c4e42bc95be97e0cbb7756b/FLAG77e30498a [2021-11-19 04:39:32,925 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 04:39:32,926 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/sv-benchmarks/c/bitvector/num_conversion_2.c [2021-11-19 04:39:32,942 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/data/36c9f5fa5/193112807c4e42bc95be97e0cbb7756b/FLAG77e30498a [2021-11-19 04:39:33,263 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/data/36c9f5fa5/193112807c4e42bc95be97e0cbb7756b [2021-11-19 04:39:33,266 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 04:39:33,267 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 04:39:33,284 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 04:39:33,284 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 04:39:33,289 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 04:39:33,290 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:39:33" (1/1) ... [2021-11-19 04:39:33,291 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a894eaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:39:33, skipping insertion in model container [2021-11-19 04:39:33,292 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:39:33" (1/1) ... [2021-11-19 04:39:33,301 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 04:39:33,316 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:39:33,558 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/sv-benchmarks/c/bitvector/num_conversion_2.c[685,698] [2021-11-19 04:39:33,577 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:39:33,588 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 04:39:33,602 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/sv-benchmarks/c/bitvector/num_conversion_2.c[685,698] [2021-11-19 04:39:33,608 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:39:33,625 INFO L208 MainTranslator]: Completed translation [2021-11-19 04:39:33,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:39:33 WrapperNode [2021-11-19 04:39:33,626 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 04:39:33,628 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 04:39:33,628 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 04:39:33,629 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 04:39:33,638 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:39:33" (1/1) ... [2021-11-19 04:39:33,647 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:39:33" (1/1) ... [2021-11-19 04:39:33,669 INFO L137 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 34 [2021-11-19 04:39:33,669 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 04:39:33,670 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 04:39:33,670 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 04:39:33,671 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 04:39:33,681 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:39:33" (1/1) ... [2021-11-19 04:39:33,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:39:33" (1/1) ... [2021-11-19 04:39:33,683 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:39:33" (1/1) ... [2021-11-19 04:39:33,683 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:39:33" (1/1) ... [2021-11-19 04:39:33,688 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:39:33" (1/1) ... [2021-11-19 04:39:33,692 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:39:33" (1/1) ... [2021-11-19 04:39:33,694 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:39:33" (1/1) ... [2021-11-19 04:39:33,696 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 04:39:33,697 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 04:39:33,697 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 04:39:33,697 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 04:39:33,699 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:39:33" (1/1) ... [2021-11-19 04:39:33,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:39:33,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:39:33,748 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 04:39:33,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 04:39:33,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 04:39:33,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 04:39:33,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 04:39:33,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 04:39:33,894 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 04:39:33,897 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 04:39:34,068 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 04:39:34,077 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 04:39:34,077 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 04:39:34,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:39:34 BoogieIcfgContainer [2021-11-19 04:39:34,079 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 04:39:34,082 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 04:39:34,082 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 04:39:34,098 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 04:39:34,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:39:33" (1/3) ... [2021-11-19 04:39:34,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77d5aa46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:39:34, skipping insertion in model container [2021-11-19 04:39:34,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:39:33" (2/3) ... [2021-11-19 04:39:34,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77d5aa46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:39:34, skipping insertion in model container [2021-11-19 04:39:34,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:39:34" (3/3) ... [2021-11-19 04:39:34,103 INFO L111 eAbstractionObserver]: Analyzing ICFG num_conversion_2.c [2021-11-19 04:39:34,110 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 04:39:34,111 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 04:39:34,188 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 04:39:34,200 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 [2021-11-19 04:39:34,200 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 04:39:34,234 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 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) [2021-11-19 04:39:34,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-19 04:39:34,241 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:39:34,241 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-19 04:39:34,242 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:39:34,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:39:34,261 INFO L85 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2021-11-19 04:39:34,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:39:34,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023256112] [2021-11-19 04:39:34,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:39:34,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:39:34,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:39:34,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:39:34,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:39:34,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023256112] [2021-11-19 04:39:34,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023256112] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:39:34,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:39:34,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 04:39:34,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684256118] [2021-11-19 04:39:34,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:39:34,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 04:39:34,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:39:34,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 04:39:34,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 04:39:34,516 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 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) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-11-19 04:39:34,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:39:34,533 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-11-19 04:39:34,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 04:39:34,536 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2021-11-19 04:39:34,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:39:34,546 INFO L225 Difference]: With dead ends: 21 [2021-11-19 04:39:34,547 INFO L226 Difference]: Without dead ends: 9 [2021-11-19 04:39:34,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 04:39:34,558 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:39:34,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:39:34,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-19 04:39:34,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-19 04:39:34,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:39:34,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-11-19 04:39:34,603 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-11-19 04:39:34,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:39:34,604 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-11-19 04:39:34,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-11-19 04:39:34,605 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-11-19 04:39:34,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-19 04:39:34,606 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:39:34,606 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-19 04:39:34,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 04:39:34,607 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:39:34,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:39:34,610 INFO L85 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2021-11-19 04:39:34,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:39:34,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881368075] [2021-11-19 04:39:34,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:39:34,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:39:34,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:39:34,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:39:34,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:39:34,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881368075] [2021-11-19 04:39:34,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881368075] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:39:34,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:39:34,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:39:34,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590002125] [2021-11-19 04:39:34,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:39:34,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:39:34,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:39:34,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:39:34,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:39:34,744 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-11-19 04:39:34,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:39:34,759 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2021-11-19 04:39:34,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:39:34,760 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2021-11-19 04:39:34,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:39:34,761 INFO L225 Difference]: With dead ends: 16 [2021-11-19 04:39:34,761 INFO L226 Difference]: Without dead ends: 12 [2021-11-19 04:39:34,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:39:34,764 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:39:34,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 14 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:39:34,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-19 04:39:34,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2021-11-19 04:39:34,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:39:34,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-11-19 04:39:34,770 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2021-11-19 04:39:34,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:39:34,771 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-11-19 04:39:34,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-11-19 04:39:34,772 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-11-19 04:39:34,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-19 04:39:34,772 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:39:34,773 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:39:34,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 04:39:34,773 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:39:34,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:39:34,774 INFO L85 PathProgramCache]: Analyzing trace with hash 641725625, now seen corresponding path program 1 times [2021-11-19 04:39:34,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:39:34,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060796182] [2021-11-19 04:39:34,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:39:34,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:39:34,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:39:34,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:39:34,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:39:34,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060796182] [2021-11-19 04:39:34,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060796182] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:39:34,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40143093] [2021-11-19 04:39:34,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:39:34,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:39:34,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:39:34,946 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:39:34,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 04:39:35,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:39:35,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 04:39:35,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:39:35,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:39:35,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:39:35,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:39:35,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40143093] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:39:35,173 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:39:35,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-19 04:39:35,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071983405] [2021-11-19 04:39:35,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:39:35,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:39:35,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:39:35,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:39:35,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:39:35,193 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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) [2021-11-19 04:39:35,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:39:35,259 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2021-11-19 04:39:35,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 04:39:35,260 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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 9 [2021-11-19 04:39:35,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:39:35,261 INFO L225 Difference]: With dead ends: 23 [2021-11-19 04:39:35,262 INFO L226 Difference]: Without dead ends: 19 [2021-11-19 04:39:35,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:39:35,264 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:39:35,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 30 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:39:35,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-19 04:39:35,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-19 04:39:35,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 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) [2021-11-19 04:39:35,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-11-19 04:39:35,288 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 9 [2021-11-19 04:39:35,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:39:35,288 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-11-19 04:39:35,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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) [2021-11-19 04:39:35,289 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-11-19 04:39:35,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-19 04:39:35,290 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:39:35,291 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-19 04:39:35,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 04:39:35,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:39:35,504 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:39:35,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:39:35,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1171899538, now seen corresponding path program 2 times [2021-11-19 04:39:35,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:39:35,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983604036] [2021-11-19 04:39:35,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:39:35,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:39:35,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:39:35,720 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:39:35,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:39:35,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983604036] [2021-11-19 04:39:35,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983604036] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:39:35,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130469385] [2021-11-19 04:39:35,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:39:35,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:39:35,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:39:35,736 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:39:35,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 04:39:35,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:39:35,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:39:35,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 04:39:35,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:39:35,948 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:39:35,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:39:36,157 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:39:36,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130469385] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:39:36,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:39:36,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2021-11-19 04:39:36,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491041037] [2021-11-19 04:39:36,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:39:36,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 04:39:36,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:39:36,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 04:39:36,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-11-19 04:39:36,166 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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) [2021-11-19 04:39:36,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:39:36,452 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2021-11-19 04:39:36,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 04:39:36,462 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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) Word has length 18 [2021-11-19 04:39:36,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:39:36,464 INFO L225 Difference]: With dead ends: 35 [2021-11-19 04:39:36,464 INFO L226 Difference]: Without dead ends: 31 [2021-11-19 04:39:36,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-11-19 04:39:36,467 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 39 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:39:36,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 92 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:39:36,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-19 04:39:36,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-19 04:39:36,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3) internal successors, (39), 30 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) [2021-11-19 04:39:36,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2021-11-19 04:39:36,480 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 18 [2021-11-19 04:39:36,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:39:36,481 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2021-11-19 04:39:36,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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) [2021-11-19 04:39:36,482 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2021-11-19 04:39:36,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 04:39:36,483 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:39:36,484 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1] [2021-11-19 04:39:36,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 04:39:36,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:39:36,711 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:39:36,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:39:36,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1720528430, now seen corresponding path program 3 times [2021-11-19 04:39:36,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:39:36,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984394074] [2021-11-19 04:39:36,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:39:36,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:39:36,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 04:39:36,777 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-19 04:39:36,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 04:39:36,850 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-19 04:39:36,851 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-19 04:39:36,852 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-19 04:39:36,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 04:39:36,859 INFO L732 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2021-11-19 04:39:36,863 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-19 04:39:36,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 04:39:36 BoogieIcfgContainer [2021-11-19 04:39:36,902 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-19 04:39:36,903 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-19 04:39:36,903 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-19 04:39:36,903 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-19 04:39:36,904 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:39:34" (3/4) ... [2021-11-19 04:39:36,907 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-19 04:39:36,908 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-19 04:39:36,908 INFO L158 Benchmark]: Toolchain (without parser) took 3641.13ms. Allocated memory is still 109.1MB. Free memory was 75.9MB in the beginning and 81.1MB in the end (delta: -5.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 04:39:36,909 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 81.8MB. Free memory was 40.4MB in the beginning and 40.3MB in the end (delta: 44.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 04:39:36,910 INFO L158 Benchmark]: CACSL2BoogieTranslator took 342.75ms. Allocated memory is still 109.1MB. Free memory was 75.7MB in the beginning and 84.7MB in the end (delta: -8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-19 04:39:36,910 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.48ms. Allocated memory is still 109.1MB. Free memory was 84.7MB in the beginning and 83.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 04:39:36,911 INFO L158 Benchmark]: Boogie Preprocessor took 25.81ms. Allocated memory is still 109.1MB. Free memory was 83.3MB in the beginning and 82.2MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 04:39:36,911 INFO L158 Benchmark]: RCFGBuilder took 382.67ms. Allocated memory is still 109.1MB. Free memory was 82.2MB in the beginning and 73.0MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-19 04:39:36,912 INFO L158 Benchmark]: TraceAbstraction took 2820.30ms. Allocated memory is still 109.1MB. Free memory was 72.6MB in the beginning and 81.1MB in the end (delta: -8.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 04:39:36,912 INFO L158 Benchmark]: Witness Printer took 5.33ms. Allocated memory is still 109.1MB. Free memory is still 81.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 04:39:36,915 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 81.8MB. Free memory was 40.4MB in the beginning and 40.3MB in the end (delta: 44.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 342.75ms. Allocated memory is still 109.1MB. Free memory was 75.7MB in the beginning and 84.7MB in the end (delta: -8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.48ms. Allocated memory is still 109.1MB. Free memory was 84.7MB in the beginning and 83.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.81ms. Allocated memory is still 109.1MB. Free memory was 83.3MB in the beginning and 82.2MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 382.67ms. Allocated memory is still 109.1MB. Free memory was 82.2MB in the beginning and 73.0MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 2820.30ms. Allocated memory is still 109.1MB. Free memory was 72.6MB in the beginning and 81.1MB in the end (delta: -8.5MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 5.33ms. Allocated memory is still 109.1MB. Free memory is still 81.1MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 16]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of shiftLeft at line 31, overapproximation of bitwiseAnd at line 32. Possible FailurePath: [L24] unsigned char x = __VERIFIER_nondet_uchar(); [L25] unsigned char y; [L26] unsigned char c; [L28] y = 0 [L29] c = 0 VAL [c=0, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [c=0, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=0, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=1, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [c=1, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=1, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=2, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [c=2, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=2, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=3, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [c=3, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=3, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=4, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [c=4, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=4, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=5, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [c=5, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=5, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=6, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [c=6, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=6, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=7, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [c=7, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=7, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=8, y=0] [L30] COND FALSE !(c < (unsigned char)8) VAL [bit=0, c=8, y=0] [L38] CALL __VERIFIER_assert(x == y) [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L16] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.7s, OverallIterations: 5, TraceHistogramMax: 8, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 57 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 57 mSDsluCounter, 150 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 102 mSDsCounter, 15 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 91 IncrementalHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 15 mSolverCounterUnsat, 48 mSDtfsCounter, 91 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=4, InterpolantAutomatonStates: 21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 96 NumberOfCodeBlocks, 96 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 85 ConstructedInterpolants, 0 QuantifiedInterpolants, 457 SizeOfPredicates, 2 NumberOfNonLiveVariables, 99 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 0/69 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-19 04:39:36,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/num_conversion_2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL --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 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 04:39:40,044 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 04:39:40,047 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 04:39:40,091 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 04:39:40,092 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 04:39:40,094 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 04:39:40,096 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 04:39:40,101 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 04:39:40,104 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 04:39:40,106 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 04:39:40,108 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 04:39:40,110 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 04:39:40,110 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 04:39:40,112 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 04:39:40,114 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 04:39:40,116 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 04:39:40,118 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 04:39:40,120 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 04:39:40,131 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 04:39:40,134 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 04:39:40,137 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 04:39:40,139 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 04:39:40,141 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 04:39:40,142 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 04:39:40,147 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 04:39:40,148 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 04:39:40,148 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 04:39:40,150 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 04:39:40,151 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 04:39:40,152 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 04:39:40,153 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 04:39:40,155 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 04:39:40,156 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 04:39:40,157 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 04:39:40,159 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 04:39:40,161 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 04:39:40,163 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 04:39:40,163 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 04:39:40,164 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 04:39:40,167 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 04:39:40,168 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 04:39:40,172 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-11-19 04:39:40,240 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 04:39:40,240 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 04:39:40,241 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 04:39:40,242 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 04:39:40,243 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 04:39:40,243 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 04:39:40,245 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 04:39:40,246 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 04:39:40,246 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 04:39:40,247 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 04:39:40,248 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 04:39:40,248 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 04:39:40,249 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 04:39:40,249 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 04:39:40,249 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 04:39:40,250 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 04:39:40,250 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 04:39:40,250 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 04:39:40,250 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 04:39:40,251 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 04:39:40,251 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 04:39:40,251 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 04:39:40,252 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 04:39:40,252 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 04:39:40,252 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 04:39:40,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:39:40,253 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 04:39:40,253 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 04:39:40,253 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 04:39:40,254 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-19 04:39:40,254 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 04:39:40,254 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 04:39:40,255 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 04:39:40,255 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 04:39:40,255 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 04:39:40,255 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 04:39:40,256 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 [2021-11-19 04:39:40,759 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 04:39:40,792 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 04:39:40,797 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 04:39:40,799 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 04:39:40,800 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 04:39:40,801 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/bitvector/num_conversion_2.c [2021-11-19 04:39:40,916 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/data/362f2898a/a0742859658d4b64abca2db0fe2d3bbb/FLAGd3d07cd4d [2021-11-19 04:39:41,681 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 04:39:41,682 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/sv-benchmarks/c/bitvector/num_conversion_2.c [2021-11-19 04:39:41,692 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/data/362f2898a/a0742859658d4b64abca2db0fe2d3bbb/FLAGd3d07cd4d [2021-11-19 04:39:42,017 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/data/362f2898a/a0742859658d4b64abca2db0fe2d3bbb [2021-11-19 04:39:42,020 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 04:39:42,022 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 04:39:42,023 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 04:39:42,024 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 04:39:42,029 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 04:39:42,030 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:39:42" (1/1) ... [2021-11-19 04:39:42,031 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a146a77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:39:42, skipping insertion in model container [2021-11-19 04:39:42,032 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:39:42" (1/1) ... [2021-11-19 04:39:42,041 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 04:39:42,058 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:39:42,225 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/sv-benchmarks/c/bitvector/num_conversion_2.c[685,698] [2021-11-19 04:39:42,257 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:39:42,272 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 04:39:42,289 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/sv-benchmarks/c/bitvector/num_conversion_2.c[685,698] [2021-11-19 04:39:42,299 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:39:42,325 INFO L208 MainTranslator]: Completed translation [2021-11-19 04:39:42,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:39:42 WrapperNode [2021-11-19 04:39:42,326 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 04:39:42,328 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 04:39:42,328 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 04:39:42,328 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 04:39:42,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:39:42" (1/1) ... [2021-11-19 04:39:42,349 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:39:42" (1/1) ... [2021-11-19 04:39:42,416 INFO L137 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 34 [2021-11-19 04:39:42,432 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 04:39:42,433 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 04:39:42,433 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 04:39:42,433 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 04:39:42,444 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:39:42" (1/1) ... [2021-11-19 04:39:42,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:39:42" (1/1) ... [2021-11-19 04:39:42,468 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:39:42" (1/1) ... [2021-11-19 04:39:42,468 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:39:42" (1/1) ... [2021-11-19 04:39:42,474 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:39:42" (1/1) ... [2021-11-19 04:39:42,481 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:39:42" (1/1) ... [2021-11-19 04:39:42,491 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:39:42" (1/1) ... [2021-11-19 04:39:42,494 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 04:39:42,496 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 04:39:42,502 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 04:39:42,502 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 04:39:42,503 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:39:42" (1/1) ... [2021-11-19 04:39:42,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:39:42,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:39:42,546 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 04:39:42,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 04:39:42,611 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 04:39:42,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 04:39:42,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 04:39:42,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 04:39:42,718 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 04:39:42,720 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 04:39:42,903 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 04:39:42,910 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 04:39:42,910 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 04:39:42,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:39:42 BoogieIcfgContainer [2021-11-19 04:39:42,913 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 04:39:42,915 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 04:39:42,915 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 04:39:42,920 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 04:39:42,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:39:42" (1/3) ... [2021-11-19 04:39:42,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bcbc69f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:39:42, skipping insertion in model container [2021-11-19 04:39:42,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:39:42" (2/3) ... [2021-11-19 04:39:42,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bcbc69f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:39:42, skipping insertion in model container [2021-11-19 04:39:42,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:39:42" (3/3) ... [2021-11-19 04:39:42,924 INFO L111 eAbstractionObserver]: Analyzing ICFG num_conversion_2.c [2021-11-19 04:39:42,932 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 04:39:42,932 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 04:39:43,011 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 04:39:43,036 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 [2021-11-19 04:39:43,037 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 04:39:43,072 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 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) [2021-11-19 04:39:43,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-19 04:39:43,085 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:39:43,086 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-19 04:39:43,087 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:39:43,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:39:43,096 INFO L85 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2021-11-19 04:39:43,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:39:43,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1778635243] [2021-11-19 04:39:43,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:39:43,115 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:39:43,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:39:43,120 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:39:43,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 04:39:43,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:39:43,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 04:39:43,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:39:43,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:39:43,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:39:43,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:39:43,350 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:39:43,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1778635243] [2021-11-19 04:39:43,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1778635243] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 04:39:43,352 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:39:43,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 04:39:43,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821448814] [2021-11-19 04:39:43,361 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 04:39:43,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 04:39:43,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:39:43,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 04:39:43,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 04:39:43,415 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 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) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-11-19 04:39:43,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:39:43,435 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-11-19 04:39:43,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 04:39:43,439 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2021-11-19 04:39:43,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:39:43,449 INFO L225 Difference]: With dead ends: 21 [2021-11-19 04:39:43,449 INFO L226 Difference]: Without dead ends: 9 [2021-11-19 04:39:43,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 04:39:43,458 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:39:43,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:39:43,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-19 04:39:43,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-19 04:39:43,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:39:43,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-11-19 04:39:43,503 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-11-19 04:39:43,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:39:43,504 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-11-19 04:39:43,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-11-19 04:39:43,505 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-11-19 04:39:43,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-19 04:39:43,506 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:39:43,506 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-19 04:39:43,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 04:39:43,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:39:43,721 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:39:43,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:39:43,724 INFO L85 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2021-11-19 04:39:43,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:39:43,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1177684068] [2021-11-19 04:39:43,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:39:43,726 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:39:43,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:39:43,732 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:39:43,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 04:39:43,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:39:43,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 04:39:43,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:39:43,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:39:43,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:39:43,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:39:43,949 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:39:43,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1177684068] [2021-11-19 04:39:43,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1177684068] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 04:39:43,950 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:39:43,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 04:39:43,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003172743] [2021-11-19 04:39:43,950 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 04:39:43,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:39:43,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:39:43,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:39:43,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:39:43,965 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-11-19 04:39:44,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:39:44,012 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2021-11-19 04:39:44,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:39:44,013 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 6 [2021-11-19 04:39:44,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:39:44,021 INFO L225 Difference]: With dead ends: 17 [2021-11-19 04:39:44,022 INFO L226 Difference]: Without dead ends: 13 [2021-11-19 04:39:44,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:39:44,025 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 9 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:39:44,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 14 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:39:44,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-19 04:39:44,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-19 04:39:44,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:39:44,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-11-19 04:39:44,032 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 6 [2021-11-19 04:39:44,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:39:44,033 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-11-19 04:39:44,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-11-19 04:39:44,033 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-11-19 04:39:44,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-19 04:39:44,034 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:39:44,034 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-19 04:39:44,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 04:39:44,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:39:44,248 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:39:44,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:39:44,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1950053902, now seen corresponding path program 1 times [2021-11-19 04:39:44,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:39:44,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2082410462] [2021-11-19 04:39:44,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:39:44,251 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:39:44,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:39:44,260 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:39:44,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 04:39:44,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:39:44,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 04:39:44,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:39:44,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:39:44,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:39:44,498 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:39:44,498 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:39:44,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2082410462] [2021-11-19 04:39:44,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2082410462] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:39:44,499 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:39:44,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-19 04:39:44,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298680385] [2021-11-19 04:39:44,500 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:39:44,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:39:44,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:39:44,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:39:44,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:39:44,503 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 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) [2021-11-19 04:39:44,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:39:44,641 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2021-11-19 04:39:44,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:39:44,642 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-19 04:39:44,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:39:44,645 INFO L225 Difference]: With dead ends: 29 [2021-11-19 04:39:44,645 INFO L226 Difference]: Without dead ends: 25 [2021-11-19 04:39:44,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-19 04:39:44,654 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 23 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:39:44,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 44 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:39:44,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-19 04:39:44,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-19 04:39:44,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 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) [2021-11-19 04:39:44,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2021-11-19 04:39:44,671 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 12 [2021-11-19 04:39:44,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:39:44,672 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2021-11-19 04:39:44,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 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) [2021-11-19 04:39:44,672 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2021-11-19 04:39:44,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 04:39:44,674 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:39:44,674 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1] [2021-11-19 04:39:44,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 04:39:44,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:39:44,884 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:39:44,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:39:44,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1786738894, now seen corresponding path program 2 times [2021-11-19 04:39:44,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:39:44,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [341689952] [2021-11-19 04:39:44,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:39:44,887 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:39:44,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:39:44,898 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:39:44,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 04:39:44,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:39:44,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:39:44,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 04:39:44,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:39:45,238 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:39:45,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:39:45,537 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:39:45,538 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:39:45,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [341689952] [2021-11-19 04:39:45,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [341689952] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:39:45,544 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:39:45,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-19 04:39:45,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356932612] [2021-11-19 04:39:45,546 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:39:45,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 04:39:45,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:39:45,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 04:39:45,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-11-19 04:39:45,553 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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) [2021-11-19 04:39:45,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:39:45,731 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2021-11-19 04:39:45,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 04:39:45,733 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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 24 [2021-11-19 04:39:45,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:39:45,734 INFO L225 Difference]: With dead ends: 35 [2021-11-19 04:39:45,734 INFO L226 Difference]: Without dead ends: 31 [2021-11-19 04:39:45,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-11-19 04:39:45,737 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 39 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:39:45,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 138 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:39:45,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-19 04:39:45,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-19 04:39:45,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3) internal successors, (39), 30 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) [2021-11-19 04:39:45,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2021-11-19 04:39:45,746 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 24 [2021-11-19 04:39:45,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:39:45,747 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2021-11-19 04:39:45,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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) [2021-11-19 04:39:45,747 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2021-11-19 04:39:45,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 04:39:45,749 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:39:45,749 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1] [2021-11-19 04:39:45,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 04:39:45,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:39:45,963 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:39:45,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:39:45,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1720528430, now seen corresponding path program 3 times [2021-11-19 04:39:45,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:39:45,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1901514951] [2021-11-19 04:39:45,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:39:45,965 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:39:45,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:39:45,966 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:39:46,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 04:39:46,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-19 04:39:46,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:39:46,025 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-19 04:39:46,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:39:50,846 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 40 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:39:50,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:39:56,513 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:39:56,514 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:39:56,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1901514951] [2021-11-19 04:39:56,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1901514951] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:39:56,514 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:39:56,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 53 [2021-11-19 04:39:56,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600400154] [2021-11-19 04:39:56,515 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:39:56,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-19 04:39:56,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:39:56,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-19 04:39:56,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=586, Invalid=2170, Unknown=0, NotChecked=0, Total=2756 [2021-11-19 04:39:56,520 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 states have internal predecessors, (57), 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) [2021-11-19 04:39:58,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:39:58,737 INFO L93 Difference]: Finished difference Result 85 states and 105 transitions. [2021-11-19 04:39:58,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-19 04:39:58,738 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 states have internal predecessors, (57), 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 30 [2021-11-19 04:39:58,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:39:58,742 INFO L225 Difference]: With dead ends: 85 [2021-11-19 04:39:58,742 INFO L226 Difference]: Without dead ends: 81 [2021-11-19 04:39:58,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=910, Invalid=3250, Unknown=0, NotChecked=0, Total=4160 [2021-11-19 04:39:58,746 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 58 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:39:58,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 64 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 147 Invalid, 0 Unknown, 110 Unchecked, 0.3s Time] [2021-11-19 04:39:58,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-19 04:39:58,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 52. [2021-11-19 04:39:58,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 51 states have internal predecessors, (67), 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) [2021-11-19 04:39:58,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2021-11-19 04:39:58,763 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 30 [2021-11-19 04:39:58,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:39:58,764 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2021-11-19 04:39:58,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 states have internal predecessors, (57), 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) [2021-11-19 04:39:58,765 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2021-11-19 04:39:58,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 04:39:58,766 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:39:58,766 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:39:58,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 04:39:58,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:39:58,991 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:39:58,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:39:58,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1777786732, now seen corresponding path program 1 times [2021-11-19 04:39:58,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:39:58,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1183401804] [2021-11-19 04:39:58,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:39:58,993 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:39:58,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:39:58,994 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:39:58,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 04:39:59,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:39:59,031 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-19 04:39:59,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:40:01,108 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:40:01,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:40:05,442 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:40:05,442 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:40:05,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1183401804] [2021-11-19 04:40:05,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1183401804] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:40:05,443 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:40:05,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-11-19 04:40:05,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429078427] [2021-11-19 04:40:05,444 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:40:05,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-19 04:40:05,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:40:05,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-19 04:40:05,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=2240, Unknown=0, NotChecked=0, Total=2652 [2021-11-19 04:40:05,447 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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) [2021-11-19 04:40:56,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:40:56,483 INFO L93 Difference]: Finished difference Result 319 states and 417 transitions. [2021-11-19 04:40:56,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 186 states. [2021-11-19 04:40:56,483 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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 30 [2021-11-19 04:40:56,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:40:56,486 INFO L225 Difference]: With dead ends: 319 [2021-11-19 04:40:56,487 INFO L226 Difference]: Without dead ends: 285 [2021-11-19 04:40:56,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16710 ImplicationChecksByTransitivity, 51.8s TimeCoverageRelationStatistics Valid=7758, Invalid=41748, Unknown=0, NotChecked=0, Total=49506 [2021-11-19 04:40:56,504 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 295 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1596 mSolverCounterSat, 562 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 2264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 562 IncrementalHoareTripleChecker+Valid, 1596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:40:56,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 121 Invalid, 2264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [562 Valid, 1596 Invalid, 0 Unknown, 106 Unchecked, 3.4s Time] [2021-11-19 04:40:56,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-11-19 04:40:56,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 160. [2021-11-19 04:40:56,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.3647798742138364) internal successors, (217), 159 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) [2021-11-19 04:40:56,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 217 transitions. [2021-11-19 04:40:56,569 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 217 transitions. Word has length 30 [2021-11-19 04:40:56,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:40:56,569 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 217 transitions. [2021-11-19 04:40:56,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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) [2021-11-19 04:40:56,570 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 217 transitions. [2021-11-19 04:40:56,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 04:40:56,572 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:40:56,573 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:40:56,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 04:40:56,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:40:56,784 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:40:56,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:40:56,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1894380496, now seen corresponding path program 2 times [2021-11-19 04:40:56,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:40:56,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1010066410] [2021-11-19 04:40:56,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:40:56,785 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:40:56,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:40:56,787 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:40:56,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 04:40:56,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:40:56,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:40:56,822 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-19 04:40:56,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:40:58,403 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:40:58,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:41:02,444 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:41:02,444 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:41:02,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1010066410] [2021-11-19 04:41:02,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1010066410] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:41:02,445 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:41:02,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-11-19 04:41:02,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804485639] [2021-11-19 04:41:02,446 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:41:02,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-19 04:41:02,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:41:02,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-19 04:41:02,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=2283, Unknown=0, NotChecked=0, Total=2652 [2021-11-19 04:41:02,450 INFO L87 Difference]: Start difference. First operand 160 states and 217 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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) [2021-11-19 04:41:49,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:41:49,562 INFO L93 Difference]: Finished difference Result 360 states and 469 transitions. [2021-11-19 04:41:49,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2021-11-19 04:41:49,563 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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 30 [2021-11-19 04:41:49,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:41:49,566 INFO L225 Difference]: With dead ends: 360 [2021-11-19 04:41:49,566 INFO L226 Difference]: Without dead ends: 307 [2021-11-19 04:41:49,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12375 ImplicationChecksByTransitivity, 48.5s TimeCoverageRelationStatistics Valid=4806, Invalid=32636, Unknown=0, NotChecked=0, Total=37442 [2021-11-19 04:41:49,576 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 222 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 1380 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 1380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:41:49,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 121 Invalid, 1774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 1380 Invalid, 0 Unknown, 108 Unchecked, 2.5s Time] [2021-11-19 04:41:49,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-11-19 04:41:49,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 184. [2021-11-19 04:41:49,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.349726775956284) internal successors, (247), 183 states have internal predecessors, (247), 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) [2021-11-19 04:41:49,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 247 transitions. [2021-11-19 04:41:49,631 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 247 transitions. Word has length 30 [2021-11-19 04:41:49,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:41:49,632 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 247 transitions. [2021-11-19 04:41:49,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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) [2021-11-19 04:41:49,633 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 247 transitions. [2021-11-19 04:41:49,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 04:41:49,635 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:41:49,636 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:41:49,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 04:41:49,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:41:49,849 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:41:49,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:41:49,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1978693868, now seen corresponding path program 3 times [2021-11-19 04:41:49,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:41:49,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [745989138] [2021-11-19 04:41:49,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:41:49,851 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:41:49,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:41:49,852 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:41:49,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 04:41:49,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-19 04:41:49,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:41:49,889 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-19 04:41:49,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:41:52,650 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:41:52,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:41:58,667 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:41:58,668 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:41:58,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [745989138] [2021-11-19 04:41:58,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [745989138] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:41:58,668 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:41:58,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2021-11-19 04:41:58,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930668264] [2021-11-19 04:41:58,669 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:41:58,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-19 04:41:58,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:41:58,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-19 04:41:58,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=464, Invalid=2398, Unknown=0, NotChecked=0, Total=2862 [2021-11-19 04:41:58,672 INFO L87 Difference]: Start difference. First operand 184 states and 247 transitions. Second operand has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 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) [2021-11-19 04:42:06,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:42:06,845 INFO L93 Difference]: Finished difference Result 409 states and 537 transitions. [2021-11-19 04:42:06,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-19 04:42:06,846 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 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 30 [2021-11-19 04:42:06,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:42:06,849 INFO L225 Difference]: With dead ends: 409 [2021-11-19 04:42:06,850 INFO L226 Difference]: Without dead ends: 403 [2021-11-19 04:42:06,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2033 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=1311, Invalid=5999, Unknown=0, NotChecked=0, Total=7310 [2021-11-19 04:42:06,853 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 64 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 417 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:42:06,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 67 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 204 Invalid, 0 Unknown, 417 Unchecked, 0.3s Time] [2021-11-19 04:42:06,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-11-19 04:42:06,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 263. [2021-11-19 04:42:06,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.3435114503816794) internal successors, (352), 262 states have internal predecessors, (352), 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) [2021-11-19 04:42:06,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 352 transitions. [2021-11-19 04:42:06,923 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 352 transitions. Word has length 30 [2021-11-19 04:42:06,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:42:06,923 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 352 transitions. [2021-11-19 04:42:06,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 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) [2021-11-19 04:42:06,924 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 352 transitions. [2021-11-19 04:42:06,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 04:42:06,927 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:42:06,927 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-11-19 04:42:06,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 04:42:07,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:42:07,131 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:42:07,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:42:07,132 INFO L85 PathProgramCache]: Analyzing trace with hash -2035952170, now seen corresponding path program 4 times [2021-11-19 04:42:07,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:42:07,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2080797437] [2021-11-19 04:42:07,132 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:42:07,132 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:42:07,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:42:07,133 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:42:07,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 04:42:07,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:42:07,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:42:07,173 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-19 04:42:07,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:42:08,862 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:42:08,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:42:13,291 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:42:13,292 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:42:13,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2080797437] [2021-11-19 04:42:13,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2080797437] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:42:13,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:42:13,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-11-19 04:42:13,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784648695] [2021-11-19 04:42:13,293 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:42:13,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-19 04:42:13,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:42:13,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-19 04:42:13,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=2256, Unknown=0, NotChecked=0, Total=2652 [2021-11-19 04:42:13,297 INFO L87 Difference]: Start difference. First operand 263 states and 352 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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) [2021-11-19 04:43:25,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:43:25,407 INFO L93 Difference]: Finished difference Result 587 states and 774 transitions. [2021-11-19 04:43:25,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2021-11-19 04:43:25,408 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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 30 [2021-11-19 04:43:25,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:43:25,412 INFO L225 Difference]: With dead ends: 587 [2021-11-19 04:43:25,412 INFO L226 Difference]: Without dead ends: 565 [2021-11-19 04:43:25,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20028 ImplicationChecksByTransitivity, 72.6s TimeCoverageRelationStatistics Valid=8138, Invalid=49222, Unknown=0, NotChecked=0, Total=57360 [2021-11-19 04:43:25,422 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 281 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 1810 mSolverCounterSat, 512 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 2449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 512 IncrementalHoareTripleChecker+Valid, 1810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:43:25,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 145 Invalid, 2449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [512 Valid, 1810 Invalid, 0 Unknown, 127 Unchecked, 3.7s Time] [2021-11-19 04:43:25,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-11-19 04:43:25,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 382. [2021-11-19 04:43:25,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 1.3595800524934383) internal successors, (518), 381 states have internal predecessors, (518), 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) [2021-11-19 04:43:25,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 518 transitions. [2021-11-19 04:43:25,520 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 518 transitions. Word has length 30 [2021-11-19 04:43:25,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:43:25,521 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 518 transitions. [2021-11-19 04:43:25,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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) [2021-11-19 04:43:25,521 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 518 transitions. [2021-11-19 04:43:25,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 04:43:25,525 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:43:25,525 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-11-19 04:43:25,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 04:43:25,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:43:25,738 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:43:25,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:43:25,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1636215058, now seen corresponding path program 5 times [2021-11-19 04:43:25,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:43:25,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1183339069] [2021-11-19 04:43:25,739 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 04:43:25,739 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:43:25,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:43:25,741 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:43:25,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 04:43:25,807 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-19 04:43:25,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:43:25,810 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-19 04:43:25,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:43:27,482 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:43:27,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:43:32,502 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:43:32,502 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:43:32,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1183339069] [2021-11-19 04:43:32,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1183339069] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:43:32,503 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:43:32,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-11-19 04:43:32,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767063064] [2021-11-19 04:43:32,504 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:43:32,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-19 04:43:32,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:43:32,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-19 04:43:32,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=2259, Unknown=0, NotChecked=0, Total=2652 [2021-11-19 04:43:32,506 INFO L87 Difference]: Start difference. First operand 382 states and 518 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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) [2021-11-19 04:44:20,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:44:20,731 INFO L93 Difference]: Finished difference Result 620 states and 831 transitions. [2021-11-19 04:44:20,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-11-19 04:44:20,732 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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 30 [2021-11-19 04:44:20,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:44:20,737 INFO L225 Difference]: With dead ends: 620 [2021-11-19 04:44:20,737 INFO L226 Difference]: Without dead ends: 579 [2021-11-19 04:44:20,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8553 ImplicationChecksByTransitivity, 50.0s TimeCoverageRelationStatistics Valid=4227, Invalid=24503, Unknown=0, NotChecked=0, Total=28730 [2021-11-19 04:44:20,742 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 177 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1659 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 2031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 1659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-19 04:44:20,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 80 Invalid, 2031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 1659 Invalid, 0 Unknown, 93 Unchecked, 2.8s Time] [2021-11-19 04:44:20,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-11-19 04:44:20,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 428. [2021-11-19 04:44:20,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 1.3559718969555035) internal successors, (579), 427 states have internal predecessors, (579), 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) [2021-11-19 04:44:20,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 579 transitions. [2021-11-19 04:44:20,823 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 579 transitions. Word has length 30 [2021-11-19 04:44:20,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:44:20,823 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 579 transitions. [2021-11-19 04:44:20,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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) [2021-11-19 04:44:20,824 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 579 transitions. [2021-11-19 04:44:20,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 04:44:20,825 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:44:20,826 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-11-19 04:44:20,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 04:44:21,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:44:21,037 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:44:21,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:44:21,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1578956756, now seen corresponding path program 6 times [2021-11-19 04:44:21,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:44:21,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [864624989] [2021-11-19 04:44:21,039 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 04:44:21,039 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:44:21,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:44:21,040 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:44:21,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 04:44:21,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-19 04:44:21,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:44:21,080 WARN L261 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-19 04:44:21,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:44:23,047 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:23,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:44:28,698 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:28,698 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:44:28,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [864624989] [2021-11-19 04:44:28,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [864624989] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:44:28,698 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:44:28,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2021-11-19 04:44:28,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322050497] [2021-11-19 04:44:28,699 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:44:28,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-19 04:44:28,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:44:28,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-19 04:44:28,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=2449, Unknown=0, NotChecked=0, Total=2862 [2021-11-19 04:44:28,700 INFO L87 Difference]: Start difference. First operand 428 states and 579 transitions. Second operand has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 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) [2021-11-19 04:44:37,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:44:37,235 INFO L93 Difference]: Finished difference Result 623 states and 844 transitions. [2021-11-19 04:44:37,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-19 04:44:37,236 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 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 30 [2021-11-19 04:44:37,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:44:37,250 INFO L225 Difference]: With dead ends: 623 [2021-11-19 04:44:37,251 INFO L226 Difference]: Without dead ends: 617 [2021-11-19 04:44:37,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1768 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=895, Invalid=6415, Unknown=0, NotChecked=0, Total=7310 [2021-11-19 04:44:37,253 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 56 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 242 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:44:37,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 87 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 280 Invalid, 0 Unknown, 242 Unchecked, 0.2s Time] [2021-11-19 04:44:37,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-11-19 04:44:37,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 550. [2021-11-19 04:44:37,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 549 states have (on average 1.3734061930783241) internal successors, (754), 549 states have internal predecessors, (754), 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) [2021-11-19 04:44:37,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 754 transitions. [2021-11-19 04:44:37,398 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 754 transitions. Word has length 30 [2021-11-19 04:44:37,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:44:37,398 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 754 transitions. [2021-11-19 04:44:37,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 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) [2021-11-19 04:44:37,399 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 754 transitions. [2021-11-19 04:44:37,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 04:44:37,400 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:44:37,400 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-11-19 04:44:37,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 04:44:37,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:44:37,615 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:44:37,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:44:37,616 INFO L85 PathProgramCache]: Analyzing trace with hash -497923054, now seen corresponding path program 7 times [2021-11-19 04:44:37,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:44:37,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1312924952] [2021-11-19 04:44:37,617 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 04:44:37,617 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:44:37,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:44:37,618 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:44:37,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 04:44:37,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:37,668 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-19 04:44:37,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:44:39,291 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:39,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:44:43,531 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:43,531 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:44:43,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1312924952] [2021-11-19 04:44:43,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1312924952] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:44:43,532 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:44:43,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-11-19 04:44:43,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24977200] [2021-11-19 04:44:43,533 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:44:43,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-19 04:44:43,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:44:43,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-19 04:44:43,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=2257, Unknown=0, NotChecked=0, Total=2652 [2021-11-19 04:44:43,535 INFO L87 Difference]: Start difference. First operand 550 states and 754 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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) [2021-11-19 04:45:12,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:45:12,630 INFO L93 Difference]: Finished difference Result 776 states and 1047 transitions. [2021-11-19 04:45:12,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2021-11-19 04:45:12,631 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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 30 [2021-11-19 04:45:12,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:45:12,636 INFO L225 Difference]: With dead ends: 776 [2021-11-19 04:45:12,637 INFO L226 Difference]: Without dead ends: 762 [2021-11-19 04:45:12,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7734 ImplicationChecksByTransitivity, 30.9s TimeCoverageRelationStatistics Valid=2487, Invalid=22635, Unknown=0, NotChecked=0, Total=25122 [2021-11-19 04:45:12,640 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 92 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 1385 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 1385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:45:12,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 101 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 1385 Invalid, 0 Unknown, 100 Unchecked, 2.3s Time] [2021-11-19 04:45:12,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-11-19 04:45:12,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 640. [2021-11-19 04:45:12,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 1.3708920187793427) internal successors, (876), 639 states have internal predecessors, (876), 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) [2021-11-19 04:45:12,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 876 transitions. [2021-11-19 04:45:12,795 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 876 transitions. Word has length 30 [2021-11-19 04:45:12,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:45:12,796 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 876 transitions. [2021-11-19 04:45:12,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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) [2021-11-19 04:45:12,796 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 876 transitions. [2021-11-19 04:45:12,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 04:45:12,797 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:45:12,798 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-11-19 04:45:12,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 04:45:13,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:45:13,010 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:45:13,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:45:13,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1120723122, now seen corresponding path program 8 times [2021-11-19 04:45:13,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:45:13,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1026248219] [2021-11-19 04:45:13,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:45:13,011 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:45:13,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:45:13,013 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:45:13,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 04:45:13,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:45:13,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:45:13,050 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-19 04:45:13,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:45:14,909 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:45:14,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:45:19,417 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:45:19,418 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:45:19,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1026248219] [2021-11-19 04:45:19,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1026248219] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:45:19,418 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:45:19,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-11-19 04:45:19,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832104311] [2021-11-19 04:45:19,418 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:45:19,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-19 04:45:19,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:45:19,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-19 04:45:19,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=2285, Unknown=0, NotChecked=0, Total=2652 [2021-11-19 04:45:19,420 INFO L87 Difference]: Start difference. First operand 640 states and 876 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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) [2021-11-19 04:46:07,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:46:07,134 INFO L93 Difference]: Finished difference Result 866 states and 1165 transitions. [2021-11-19 04:46:07,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-11-19 04:46:07,134 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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 30 [2021-11-19 04:46:07,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:46:07,140 INFO L225 Difference]: With dead ends: 866 [2021-11-19 04:46:07,140 INFO L226 Difference]: Without dead ends: 831 [2021-11-19 04:46:07,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10070 ImplicationChecksByTransitivity, 49.4s TimeCoverageRelationStatistics Valid=4419, Invalid=28161, Unknown=0, NotChecked=0, Total=32580 [2021-11-19 04:46:07,145 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 184 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 1661 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 2006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 1661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-19 04:46:07,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 174 Invalid, 2006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 1661 Invalid, 0 Unknown, 88 Unchecked, 2.9s Time] [2021-11-19 04:46:07,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2021-11-19 04:46:07,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 681. [2021-11-19 04:46:07,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 680 states have (on average 1.3691176470588236) internal successors, (931), 680 states have internal predecessors, (931), 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) [2021-11-19 04:46:07,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 931 transitions. [2021-11-19 04:46:07,306 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 931 transitions. Word has length 30 [2021-11-19 04:46:07,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:46:07,307 INFO L470 AbstractCegarLoop]: Abstraction has 681 states and 931 transitions. [2021-11-19 04:46:07,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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) [2021-11-19 04:46:07,307 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 931 transitions. [2021-11-19 04:46:07,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 04:46:07,309 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:46:07,309 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-11-19 04:46:07,336 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-19 04:46:07,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:46:07,523 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:46:07,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:46:07,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1378888560, now seen corresponding path program 9 times [2021-11-19 04:46:07,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:46:07,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [752773950] [2021-11-19 04:46:07,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:46:07,525 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:46:07,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:46:07,526 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:46:07,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 04:46:07,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-19 04:46:07,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:46:07,576 WARN L261 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-19 04:46:07,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:46:10,415 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 3 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:46:10,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:46:16,586 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:46:16,586 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:46:16,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [752773950] [2021-11-19 04:46:16,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [752773950] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:46:16,587 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:46:16,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2021-11-19 04:46:16,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544305621] [2021-11-19 04:46:16,587 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:46:16,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-19 04:46:16,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:46:16,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-19 04:46:16,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=2401, Unknown=0, NotChecked=0, Total=2862 [2021-11-19 04:46:16,589 INFO L87 Difference]: Start difference. First operand 681 states and 931 transitions. Second operand has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 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) [2021-11-19 04:46:28,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:46:28,816 INFO L93 Difference]: Finished difference Result 1022 states and 1381 transitions. [2021-11-19 04:46:28,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-11-19 04:46:28,816 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 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 30 [2021-11-19 04:46:28,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:46:28,821 INFO L225 Difference]: With dead ends: 1022 [2021-11-19 04:46:28,822 INFO L226 Difference]: Without dead ends: 1016 [2021-11-19 04:46:28,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2844 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=1687, Invalid=9025, Unknown=0, NotChecked=0, Total=10712 [2021-11-19 04:46:28,823 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 59 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 306 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:46:28,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 67 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 159 Invalid, 0 Unknown, 306 Unchecked, 0.3s Time] [2021-11-19 04:46:28,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2021-11-19 04:46:29,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 866. [2021-11-19 04:46:29,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 1.3745664739884393) internal successors, (1189), 865 states have internal predecessors, (1189), 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) [2021-11-19 04:46:29,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1189 transitions. [2021-11-19 04:46:29,032 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1189 transitions. Word has length 30 [2021-11-19 04:46:29,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:46:29,033 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 1189 transitions. [2021-11-19 04:46:29,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 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) [2021-11-19 04:46:29,033 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1189 transitions. [2021-11-19 04:46:29,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 04:46:29,035 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:46:29,035 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-19 04:46:29,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-19 04:46:29,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:46:29,248 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:46:29,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:46:29,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1436146862, now seen corresponding path program 10 times [2021-11-19 04:46:29,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:46:29,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [325721224] [2021-11-19 04:46:29,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:46:29,249 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:46:29,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:46:29,250 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:46:29,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 04:46:29,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:46:29,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:46:29,274 WARN L261 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-19 04:46:29,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:46:30,557 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:46:30,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:46:35,251 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:46:35,251 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:46:35,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [325721224] [2021-11-19 04:46:35,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [325721224] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:46:35,251 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:46:35,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-11-19 04:46:35,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135473311] [2021-11-19 04:46:35,252 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:46:35,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-19 04:46:35,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:46:35,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-19 04:46:35,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=2263, Unknown=0, NotChecked=0, Total=2652 [2021-11-19 04:46:35,254 INFO L87 Difference]: Start difference. First operand 866 states and 1189 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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) [2021-11-19 04:47:38,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:47:38,131 INFO L93 Difference]: Finished difference Result 1142 states and 1552 transitions. [2021-11-19 04:47:38,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-11-19 04:47:38,133 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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 30 [2021-11-19 04:47:38,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:47:38,138 INFO L225 Difference]: With dead ends: 1142 [2021-11-19 04:47:38,139 INFO L226 Difference]: Without dead ends: 1120 [2021-11-19 04:47:38,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12469 ImplicationChecksByTransitivity, 63.1s TimeCoverageRelationStatistics Valid=6080, Invalid=33322, Unknown=0, NotChecked=0, Total=39402 [2021-11-19 04:47:38,143 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 231 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 2128 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 2655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 2128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:47:38,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 163 Invalid, 2655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 2128 Invalid, 0 Unknown, 131 Unchecked, 4.0s Time] [2021-11-19 04:47:38,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-11-19 04:47:38,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 937. [2021-11-19 04:47:38,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 1.3803418803418803) internal successors, (1292), 936 states have internal predecessors, (1292), 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) [2021-11-19 04:47:38,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 1292 transitions. [2021-11-19 04:47:38,425 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 1292 transitions. Word has length 30 [2021-11-19 04:47:38,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:47:38,428 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 1292 transitions. [2021-11-19 04:47:38,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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) [2021-11-19 04:47:38,429 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 1292 transitions. [2021-11-19 04:47:38,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 04:47:38,431 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:47:38,431 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-11-19 04:47:38,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 04:47:38,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:47:38,643 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:47:38,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:47:38,643 INFO L85 PathProgramCache]: Analyzing trace with hash 216357974, now seen corresponding path program 11 times [2021-11-19 04:47:38,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:47:38,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2122874546] [2021-11-19 04:47:38,644 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 04:47:38,644 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:47:38,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:47:38,646 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:47:38,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 04:47:38,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-19 04:47:38,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:47:38,688 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-19 04:47:38,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:47:40,102 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:47:40,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:47:44,391 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:47:44,392 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:47:44,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2122874546] [2021-11-19 04:47:44,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2122874546] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:47:44,392 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:47:44,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-11-19 04:47:44,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144313416] [2021-11-19 04:47:44,393 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:47:44,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-19 04:47:44,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:47:44,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-19 04:47:44,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=2258, Unknown=0, NotChecked=0, Total=2652 [2021-11-19 04:47:44,394 INFO L87 Difference]: Start difference. First operand 937 states and 1292 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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) [2021-11-19 04:48:39,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:39,812 INFO L93 Difference]: Finished difference Result 1274 states and 1751 transitions. [2021-11-19 04:48:39,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2021-11-19 04:48:39,813 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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 30 [2021-11-19 04:48:39,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:39,823 INFO L225 Difference]: With dead ends: 1274 [2021-11-19 04:48:39,823 INFO L226 Difference]: Without dead ends: 1247 [2021-11-19 04:48:39,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12700 ImplicationChecksByTransitivity, 55.8s TimeCoverageRelationStatistics Valid=4921, Invalid=34879, Unknown=0, NotChecked=0, Total=39800 [2021-11-19 04:48:39,829 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 141 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2177 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 2519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 2177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:39,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 86 Invalid, 2519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 2177 Invalid, 0 Unknown, 53 Unchecked, 3.4s Time] [2021-11-19 04:48:39,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2021-11-19 04:48:40,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 1050. [2021-11-19 04:48:40,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1049 states have (on average 1.3775023832221163) internal successors, (1445), 1049 states have internal predecessors, (1445), 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) [2021-11-19 04:48:40,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 1445 transitions. [2021-11-19 04:48:40,159 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 1445 transitions. Word has length 30 [2021-11-19 04:48:40,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:40,160 INFO L470 AbstractCegarLoop]: Abstraction has 1050 states and 1445 transitions. [2021-11-19 04:48:40,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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) [2021-11-19 04:48:40,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 1445 transitions. [2021-11-19 04:48:40,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 04:48:40,162 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:40,162 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:40,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 04:48:40,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:48:40,376 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:40,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:40,377 INFO L85 PathProgramCache]: Analyzing trace with hash -406442094, now seen corresponding path program 12 times [2021-11-19 04:48:40,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:48:40,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1330063073] [2021-11-19 04:48:40,378 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 04:48:40,378 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:48:40,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:48:40,379 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:48:40,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 04:48:40,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-19 04:48:40,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:48:40,431 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-19 04:48:40,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:48:42,615 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:48:42,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:48:47,980 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 7 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:48:47,980 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:48:47,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1330063073] [2021-11-19 04:48:47,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1330063073] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:48:47,981 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:48:47,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2021-11-19 04:48:47,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095193836] [2021-11-19 04:48:47,982 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:48:47,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-19 04:48:47,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:48:47,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-19 04:48:47,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=446, Invalid=2416, Unknown=0, NotChecked=0, Total=2862 [2021-11-19 04:48:47,983 INFO L87 Difference]: Start difference. First operand 1050 states and 1445 transitions. Second operand has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 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) [2021-11-19 04:49:16,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:16,017 INFO L93 Difference]: Finished difference Result 1256 states and 1720 transitions. [2021-11-19 04:49:16,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-11-19 04:49:16,017 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 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 30 [2021-11-19 04:49:16,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:16,022 INFO L225 Difference]: With dead ends: 1256 [2021-11-19 04:49:16,022 INFO L226 Difference]: Without dead ends: 1250 [2021-11-19 04:49:16,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3606 ImplicationChecksByTransitivity, 32.7s TimeCoverageRelationStatistics Valid=2341, Invalid=11939, Unknown=0, NotChecked=0, Total=14280 [2021-11-19 04:49:16,024 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 107 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1132 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:16,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 77 Invalid, 1625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 434 Invalid, 0 Unknown, 1132 Unchecked, 0.4s Time] [2021-11-19 04:49:16,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-11-19 04:49:16,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1191. [2021-11-19 04:49:16,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 1190 states have (on average 1.377310924369748) internal successors, (1639), 1190 states have internal predecessors, (1639), 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) [2021-11-19 04:49:16,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 1639 transitions. [2021-11-19 04:49:16,365 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 1639 transitions. Word has length 30 [2021-11-19 04:49:16,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:16,365 INFO L470 AbstractCegarLoop]: Abstraction has 1191 states and 1639 transitions. [2021-11-19 04:49:16,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 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) [2021-11-19 04:49:16,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 1639 transitions. [2021-11-19 04:49:16,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 04:49:16,368 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:16,368 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:16,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 04:49:16,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:49:16,581 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:49:16,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:16,581 INFO L85 PathProgramCache]: Analyzing trace with hash -463700396, now seen corresponding path program 13 times [2021-11-19 04:49:16,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:49:16,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1880100877] [2021-11-19 04:49:16,582 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 04:49:16,583 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:49:16,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:49:16,584 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:49:16,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 04:49:16,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:16,625 WARN L261 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-19 04:49:16,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:49:17,991 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:49:17,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:49:22,158 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:49:22,158 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:49:22,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1880100877] [2021-11-19 04:49:22,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1880100877] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:49:22,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:49:22,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-11-19 04:49:22,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419680820] [2021-11-19 04:49:22,159 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:49:22,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-19 04:49:22,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:49:22,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-19 04:49:22,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=2258, Unknown=0, NotChecked=0, Total=2652 [2021-11-19 04:49:22,161 INFO L87 Difference]: Start difference. First operand 1191 states and 1639 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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) [2021-11-19 04:50:31,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:50:31,630 INFO L93 Difference]: Finished difference Result 1605 states and 2179 transitions. [2021-11-19 04:50:31,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2021-11-19 04:50:31,631 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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 30 [2021-11-19 04:50:31,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:50:31,638 INFO L225 Difference]: With dead ends: 1605 [2021-11-19 04:50:31,638 INFO L226 Difference]: Without dead ends: 1583 [2021-11-19 04:50:31,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18248 ImplicationChecksByTransitivity, 69.5s TimeCoverageRelationStatistics Valid=6948, Invalid=46182, Unknown=0, NotChecked=0, Total=53130 [2021-11-19 04:50:31,641 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 229 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 2059 mSolverCounterSat, 459 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 2650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 459 IncrementalHoareTripleChecker+Valid, 2059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:50:31,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 177 Invalid, 2650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [459 Valid, 2059 Invalid, 0 Unknown, 132 Unchecked, 3.7s Time] [2021-11-19 04:50:31,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1583 states. [2021-11-19 04:50:31,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1583 to 1323. [2021-11-19 04:50:31,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1323 states, 1322 states have (on average 1.3789712556732223) internal successors, (1823), 1322 states have internal predecessors, (1823), 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) [2021-11-19 04:50:31,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1323 states to 1323 states and 1823 transitions. [2021-11-19 04:50:31,970 INFO L78 Accepts]: Start accepts. Automaton has 1323 states and 1823 transitions. Word has length 30 [2021-11-19 04:50:31,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:50:31,971 INFO L470 AbstractCegarLoop]: Abstraction has 1323 states and 1823 transitions. [2021-11-19 04:50:31,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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) [2021-11-19 04:50:31,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1323 states and 1823 transitions. [2021-11-19 04:50:31,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 04:50:31,973 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:50:31,973 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-11-19 04:50:32,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 04:50:32,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:50:32,187 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:50:32,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:50:32,187 INFO L85 PathProgramCache]: Analyzing trace with hash -41807464, now seen corresponding path program 14 times [2021-11-19 04:50:32,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:50:32,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1372697537] [2021-11-19 04:50:32,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:50:32,188 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:50:32,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:50:32,189 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:50:32,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 04:50:32,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:50:32,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:50:32,224 WARN L261 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-19 04:50:32,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:50:33,626 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:50:33,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:50:38,136 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:50:38,136 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:50:38,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1372697537] [2021-11-19 04:50:38,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1372697537] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:50:38,136 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:50:38,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-11-19 04:50:38,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808331876] [2021-11-19 04:50:38,137 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:50:38,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-19 04:50:38,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:50:38,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-19 04:50:38,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=2260, Unknown=0, NotChecked=0, Total=2652 [2021-11-19 04:50:38,138 INFO L87 Difference]: Start difference. First operand 1323 states and 1823 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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) [2021-11-19 04:51:34,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:51:34,762 INFO L93 Difference]: Finished difference Result 1653 states and 2253 transitions. [2021-11-19 04:51:34,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2021-11-19 04:51:34,763 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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 30 [2021-11-19 04:51:34,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:51:34,769 INFO L225 Difference]: With dead ends: 1653 [2021-11-19 04:51:34,769 INFO L226 Difference]: Without dead ends: 1635 [2021-11-19 04:51:34,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14811 ImplicationChecksByTransitivity, 57.4s TimeCoverageRelationStatistics Valid=6460, Invalid=39122, Unknown=0, NotChecked=0, Total=45582 [2021-11-19 04:51:34,772 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 234 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2108 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 2615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 2108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:51:34,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 123 Invalid, 2615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 2108 Invalid, 0 Unknown, 120 Unchecked, 3.3s Time] [2021-11-19 04:51:34,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-11-19 04:51:35,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1384. [2021-11-19 04:51:35,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1383 states have (on average 1.3796095444685466) internal successors, (1908), 1383 states have internal predecessors, (1908), 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) [2021-11-19 04:51:35,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 1908 transitions. [2021-11-19 04:51:35,045 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 1908 transitions. Word has length 30 [2021-11-19 04:51:35,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:51:35,045 INFO L470 AbstractCegarLoop]: Abstraction has 1384 states and 1908 transitions. [2021-11-19 04:51:35,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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) [2021-11-19 04:51:35,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 1908 transitions. [2021-11-19 04:51:35,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 04:51:35,046 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:35,046 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-11-19 04:51:35,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 04:51:35,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:51:35,247 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:35,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:35,247 INFO L85 PathProgramCache]: Analyzing trace with hash -664607532, now seen corresponding path program 15 times [2021-11-19 04:51:35,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:51:35,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [985513304] [2021-11-19 04:51:35,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:51:35,248 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:51:35,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:51:35,249 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:51:35,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 04:51:35,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-19 04:51:35,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:51:35,287 WARN L261 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-19 04:51:35,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:51:37,836 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:51:37,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:51:43,460 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:51:43,460 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:51:43,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [985513304] [2021-11-19 04:51:43,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [985513304] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:51:43,461 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:51:43,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2021-11-19 04:51:43,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127646381] [2021-11-19 04:51:43,461 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:51:43,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-19 04:51:43,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:51:43,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-19 04:51:43,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=2411, Unknown=0, NotChecked=0, Total=2862 [2021-11-19 04:51:43,463 INFO L87 Difference]: Start difference. First operand 1384 states and 1908 transitions. Second operand has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 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) [2021-11-19 04:52:06,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:06,344 INFO L93 Difference]: Finished difference Result 1973 states and 2695 transitions. [2021-11-19 04:52:06,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-11-19 04:52:06,345 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 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 30 [2021-11-19 04:52:06,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:06,354 INFO L225 Difference]: With dead ends: 1973 [2021-11-19 04:52:06,354 INFO L226 Difference]: Without dead ends: 1967 [2021-11-19 04:52:06,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4930 ImplicationChecksByTransitivity, 28.2s TimeCoverageRelationStatistics Valid=2818, Invalid=14212, Unknown=0, NotChecked=0, Total=17030 [2021-11-19 04:52:06,357 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 143 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 836 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:06,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 85 Invalid, 1252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 283 Invalid, 0 Unknown, 836 Unchecked, 0.4s Time] [2021-11-19 04:52:06,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2021-11-19 04:52:06,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1646. [2021-11-19 04:52:06,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1646 states, 1645 states have (on average 1.3829787234042554) internal successors, (2275), 1645 states have internal predecessors, (2275), 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) [2021-11-19 04:52:06,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1646 states to 1646 states and 2275 transitions. [2021-11-19 04:52:06,692 INFO L78 Accepts]: Start accepts. Automaton has 1646 states and 2275 transitions. Word has length 30 [2021-11-19 04:52:06,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:06,692 INFO L470 AbstractCegarLoop]: Abstraction has 1646 states and 2275 transitions. [2021-11-19 04:52:06,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 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) [2021-11-19 04:52:06,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1646 states and 2275 transitions. [2021-11-19 04:52:06,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 04:52:06,694 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:06,694 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:06,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 04:52:06,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:52:06,894 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:06,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:06,895 INFO L85 PathProgramCache]: Analyzing trace with hash -721865834, now seen corresponding path program 16 times [2021-11-19 04:52:06,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:52:06,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1986172463] [2021-11-19 04:52:06,895 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:52:06,896 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:52:06,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:52:06,897 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:52:06,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef234fde-adc1-496a-95e8-b04600334864/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 04:52:06,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:52:06,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:52:06,935 WARN L261 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-19 04:52:06,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:52:08,161 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:52:08,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:52:12,360 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:52:12,360 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:52:12,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1986172463] [2021-11-19 04:52:12,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1986172463] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:52:12,361 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:52:12,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-11-19 04:52:12,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272257267] [2021-11-19 04:52:12,361 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:52:12,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-19 04:52:12,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:52:12,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-19 04:52:12,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=2263, Unknown=0, NotChecked=0, Total=2652 [2021-11-19 04:52:12,363 INFO L87 Difference]: Start difference. First operand 1646 states and 2275 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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)