./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/eureka_01-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/eureka_01-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF --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 fc84672deb8568f357f3e53d1889a4a141611ae62422dd83eb7a6bc6f311a8b1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:59:24,737 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:59:24,739 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:59:24,780 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:59:24,781 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:59:24,786 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:59:24,788 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:59:24,792 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:59:24,795 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:59:24,803 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:59:24,804 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:59:24,806 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:59:24,807 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:59:24,810 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:59:24,812 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:59:24,818 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:59:24,820 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:59:24,821 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:59:24,824 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:59:24,834 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:59:24,836 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:59:24,837 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:59:24,841 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:59:24,842 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:59:24,846 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:59:24,846 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:59:24,847 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:59:24,849 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:59:24,849 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:59:24,851 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:59:24,852 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:59:24,853 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:59:24,855 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:59:24,856 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:59:24,858 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:59:24,858 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:59:24,859 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:59:24,859 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:59:24,859 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:59:24,860 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:59:24,861 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:59:24,862 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:59:24,911 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:59:24,911 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:59:24,912 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:59:24,912 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:59:24,919 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:59:24,919 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:59:24,920 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:59:24,920 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:59:24,921 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:59:24,921 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:59:24,922 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:59:24,922 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:59:24,923 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:59:24,923 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:59:24,923 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:59:24,923 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:59:24,924 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:59:24,924 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:59:24,924 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:59:24,924 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:59:24,925 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:59:24,925 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:59:24,925 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:59:24,925 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:59:24,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:59:24,926 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:59:24,926 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:59:24,926 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:59:24,927 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:59:24,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:59:24,928 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:59:24,929 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:59:24,929 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:59:24,929 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:59:24,930 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_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fc84672deb8568f357f3e53d1889a4a141611ae62422dd83eb7a6bc6f311a8b1 [2021-11-20 06:59:25,228 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:59:25,255 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:59:25,258 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:59:25,259 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:59:25,260 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:59:25,262 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/loops/eureka_01-2.c [2021-11-20 06:59:25,339 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/data/52f5f94d8/f29086ad5d9e4487b48ad81143aa25d9/FLAGcba1972c7 [2021-11-20 06:59:25,752 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:59:25,753 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/sv-benchmarks/c/loops/eureka_01-2.c [2021-11-20 06:59:25,759 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/data/52f5f94d8/f29086ad5d9e4487b48ad81143aa25d9/FLAGcba1972c7 [2021-11-20 06:59:26,152 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/data/52f5f94d8/f29086ad5d9e4487b48ad81143aa25d9 [2021-11-20 06:59:26,155 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:59:26,156 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:59:26,158 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:59:26,158 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:59:26,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:59:26,162 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:59:26" (1/1) ... [2021-11-20 06:59:26,163 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54f08124 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:59:26, skipping insertion in model container [2021-11-20 06:59:26,163 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:59:26" (1/1) ... [2021-11-20 06:59:26,170 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:59:26,185 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:59:26,364 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_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/sv-benchmarks/c/loops/eureka_01-2.c[323,336] [2021-11-20 06:59:26,425 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:59:26,434 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:59:26,450 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_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/sv-benchmarks/c/loops/eureka_01-2.c[323,336] [2021-11-20 06:59:26,499 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:59:26,512 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:59:26,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:59:26 WrapperNode [2021-11-20 06:59:26,513 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:59:26,514 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:59:26,514 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:59:26,514 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:59:26,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:59:26" (1/1) ... [2021-11-20 06:59:26,529 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:59:26" (1/1) ... [2021-11-20 06:59:26,570 INFO L137 Inliner]: procedures = 13, calls = 100, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 199 [2021-11-20 06:59:26,571 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:59:26,572 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:59:26,572 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:59:26,572 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:59:26,581 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:59:26" (1/1) ... [2021-11-20 06:59:26,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:59:26" (1/1) ... [2021-11-20 06:59:26,585 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:59:26" (1/1) ... [2021-11-20 06:59:26,586 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:59:26" (1/1) ... [2021-11-20 06:59:26,597 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:59:26" (1/1) ... [2021-11-20 06:59:26,602 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:59:26" (1/1) ... [2021-11-20 06:59:26,604 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:59:26" (1/1) ... [2021-11-20 06:59:26,609 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:59:26,610 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:59:26,610 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:59:26,610 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:59:26,611 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:59:26" (1/1) ... [2021-11-20 06:59:26,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:59:26,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:59:26,667 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:59:26,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:59:26,701 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:59:26,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:59:26,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:59:26,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 06:59:26,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:59:26,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:59:26,702 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 06:59:26,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:59:26,767 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:59:26,768 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:59:26,964 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:59:26,970 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:59:26,970 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-20 06:59:26,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:59:26 BoogieIcfgContainer [2021-11-20 06:59:26,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:59:26,974 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:59:26,974 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:59:26,978 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:59:26,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:59:26" (1/3) ... [2021-11-20 06:59:26,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78357700 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:59:26, skipping insertion in model container [2021-11-20 06:59:26,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:59:26" (2/3) ... [2021-11-20 06:59:26,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78357700 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:59:26, skipping insertion in model container [2021-11-20 06:59:26,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:59:26" (3/3) ... [2021-11-20 06:59:26,981 INFO L111 eAbstractionObserver]: Analyzing ICFG eureka_01-2.c [2021-11-20 06:59:26,986 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:59:26,987 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:59:27,033 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:59:27,041 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 [2021-11-20 06:59:27,042 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:59:27,057 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.625) internal successors, (39), 25 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) [2021-11-20 06:59:27,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 06:59:27,062 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:59:27,063 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:59:27,064 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:59:27,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:59:27,069 INFO L85 PathProgramCache]: Analyzing trace with hash 678614248, now seen corresponding path program 1 times [2021-11-20 06:59:27,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:59:27,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770965627] [2021-11-20 06:59:27,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:59:27,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:59:27,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:59:27,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:59:27,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:59:27,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770965627] [2021-11-20 06:59:27,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770965627] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:59:27,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:59:27,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:59:27,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72270844] [2021-11-20 06:59:27,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:59:27,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:59:27,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:59:27,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:59:27,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:59:27,394 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.625) internal successors, (39), 25 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) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2021-11-20 06:59:27,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:59:27,421 INFO L93 Difference]: Finished difference Result 47 states and 70 transitions. [2021-11-20 06:59:27,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:59:27,423 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-20 06:59:27,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:59:27,429 INFO L225 Difference]: With dead ends: 47 [2021-11-20 06:59:27,430 INFO L226 Difference]: Without dead ends: 22 [2021-11-20 06:59:27,432 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 [2021-11-20 06:59:27,436 INFO L933 BasicCegarLoop]: 33 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, 33 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 [2021-11-20 06:59:27,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:59:27,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-20 06:59:27,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-20 06:59:27,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:59:27,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2021-11-20 06:59:27,468 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 11 [2021-11-20 06:59:27,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:59:27,468 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2021-11-20 06:59:27,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2021-11-20 06:59:27,469 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2021-11-20 06:59:27,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 06:59:27,470 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:59:27,470 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:59:27,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:59:27,471 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:59:27,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:59:27,477 INFO L85 PathProgramCache]: Analyzing trace with hash 137869947, now seen corresponding path program 1 times [2021-11-20 06:59:27,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:59:27,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790829805] [2021-11-20 06:59:27,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:59:27,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:59:27,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:59:27,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:59:27,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:59:27,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790829805] [2021-11-20 06:59:27,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790829805] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:59:27,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:59:27,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:59:27,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309558714] [2021-11-20 06:59:27,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:59:27,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:59:27,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:59:27,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:59:27,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:59:27,619 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2021-11-20 06:59:27,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:59:27,684 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2021-11-20 06:59:27,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:59:27,685 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-20 06:59:27,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:59:27,686 INFO L225 Difference]: With dead ends: 42 [2021-11-20 06:59:27,686 INFO L226 Difference]: Without dead ends: 25 [2021-11-20 06:59:27,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:59:27,690 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 3 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:59:27,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 35 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:59:27,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-20 06:59:27,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2021-11-20 06:59:27,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:59:27,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-11-20 06:59:27,703 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 11 [2021-11-20 06:59:27,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:59:27,704 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-11-20 06:59:27,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2021-11-20 06:59:27,706 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-11-20 06:59:27,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 06:59:27,709 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:59:27,710 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:59:27,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:59:27,712 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:59:27,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:59:27,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1682093747, now seen corresponding path program 1 times [2021-11-20 06:59:27,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:59:27,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139086895] [2021-11-20 06:59:27,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:59:27,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:59:27,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:59:27,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:59:27,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:59:27,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139086895] [2021-11-20 06:59:27,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139086895] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:59:27,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:59:27,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:59:27,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031316246] [2021-11-20 06:59:27,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:59:27,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:59:27,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:59:27,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:59:27,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:59:27,872 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:59:27,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:59:27,963 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2021-11-20 06:59:27,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:59:27,964 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-20 06:59:27,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:59:27,967 INFO L225 Difference]: With dead ends: 51 [2021-11-20 06:59:27,968 INFO L226 Difference]: Without dead ends: 40 [2021-11-20 06:59:27,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:59:27,970 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 55 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:59:27,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 26 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:59:27,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-20 06:59:27,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 24. [2021-11-20 06:59:27,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:59:27,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-11-20 06:59:27,986 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 14 [2021-11-20 06:59:27,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:59:27,986 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-11-20 06:59:27,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:59:27,987 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2021-11-20 06:59:27,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 06:59:27,989 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:59:27,989 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:59:27,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 06:59:27,990 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:59:27,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:59:27,992 INFO L85 PathProgramCache]: Analyzing trace with hash 701151449, now seen corresponding path program 1 times [2021-11-20 06:59:27,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:59:27,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035375147] [2021-11-20 06:59:27,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:59:27,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:59:28,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:59:28,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:59:28,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:59:28,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035375147] [2021-11-20 06:59:28,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035375147] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:59:28,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:59:28,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:59:28,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632447875] [2021-11-20 06:59:28,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:59:28,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:59:28,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:59:28,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:59:28,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:59:28,073 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:59:28,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:59:28,110 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2021-11-20 06:59:28,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:59:28,112 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2021-11-20 06:59:28,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:59:28,113 INFO L225 Difference]: With dead ends: 43 [2021-11-20 06:59:28,113 INFO L226 Difference]: Without dead ends: 27 [2021-11-20 06:59:28,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:59:28,114 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 27 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:59:28,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 42 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:59:28,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-20 06:59:28,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-11-20 06:59:28,120 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) [2021-11-20 06:59:28,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2021-11-20 06:59:28,120 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 17 [2021-11-20 06:59:28,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:59:28,121 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2021-11-20 06:59:28,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:59:28,121 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2021-11-20 06:59:28,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-20 06:59:28,122 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:59:28,122 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:59:28,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 06:59:28,123 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:59:28,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:59:28,123 INFO L85 PathProgramCache]: Analyzing trace with hash -792194438, now seen corresponding path program 1 times [2021-11-20 06:59:28,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:59:28,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364690562] [2021-11-20 06:59:28,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:59:28,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:59:28,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:59:28,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 06:59:28,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:59:28,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364690562] [2021-11-20 06:59:28,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364690562] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:59:28,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:59:28,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:59:28,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073097865] [2021-11-20 06:59:28,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:59:28,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:59:28,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:59:28,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:59:28,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:59:28,191 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 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) [2021-11-20 06:59:28,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:59:28,270 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2021-11-20 06:59:28,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:59:28,271 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 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 20 [2021-11-20 06:59:28,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:59:28,272 INFO L225 Difference]: With dead ends: 48 [2021-11-20 06:59:28,272 INFO L226 Difference]: Without dead ends: 41 [2021-11-20 06:59:28,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:59:28,274 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 29 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:59:28,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 25 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:59:28,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-20 06:59:28,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2021-11-20 06:59:28,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:59:28,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-11-20 06:59:28,293 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 20 [2021-11-20 06:59:28,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:59:28,294 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-11-20 06:59:28,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 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) [2021-11-20 06:59:28,294 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-11-20 06:59:28,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-20 06:59:28,296 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:59:28,296 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:59:28,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 06:59:28,301 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:59:28,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:59:28,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1624635408, now seen corresponding path program 1 times [2021-11-20 06:59:28,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:59:28,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792491925] [2021-11-20 06:59:28,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:59:28,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:59:28,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:59:28,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 06:59:28,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:59:28,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792491925] [2021-11-20 06:59:28,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792491925] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:59:28,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933968340] [2021-11-20 06:59:28,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:59:28,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:59:28,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:59:28,443 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:59:28,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:59:28,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:59:28,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:59:28,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:59:28,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 06:59:28,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:59:28,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 06:59:28,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933968340] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:59:28,822 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:59:28,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-11-20 06:59:28,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259290305] [2021-11-20 06:59:28,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:59:28,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:59:28,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:59:28,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:59:28,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:59:28,826 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:59:28,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:59:28,912 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2021-11-20 06:59:28,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:59:28,913 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-20 06:59:28,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:59:28,914 INFO L225 Difference]: With dead ends: 55 [2021-11-20 06:59:28,914 INFO L226 Difference]: Without dead ends: 35 [2021-11-20 06:59:28,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:59:28,921 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 35 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:59:28,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 33 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:59:28,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-20 06:59:28,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-11-20 06:59:28,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 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) [2021-11-20 06:59:28,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-11-20 06:59:28,927 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 23 [2021-11-20 06:59:28,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:59:28,927 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-11-20 06:59:28,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:59:28,928 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-11-20 06:59:28,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-20 06:59:28,929 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:59:28,929 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:59:28,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:59:29,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:59:29,130 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:59:29,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:59:29,130 INFO L85 PathProgramCache]: Analyzing trace with hash 55827240, now seen corresponding path program 2 times [2021-11-20 06:59:29,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:59:29,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945983834] [2021-11-20 06:59:29,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:59:29,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:59:29,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:59:29,186 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:59:29,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:59:29,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945983834] [2021-11-20 06:59:29,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945983834] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:59:29,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685490159] [2021-11-20 06:59:29,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:59:29,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:59:29,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:59:29,188 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:59:29,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:59:29,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:59:29,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:59:29,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:59:29,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:59:29,397 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:59:29,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:59:29,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685490159] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:59:29,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:59:29,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-20 06:59:29,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034412477] [2021-11-20 06:59:29,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:59:29,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:59:29,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:59:29,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:59:29,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:59:29,399 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:59:29,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:59:29,465 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2021-11-20 06:59:29,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:59:29,466 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-20 06:59:29,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:59:29,472 INFO L225 Difference]: With dead ends: 76 [2021-11-20 06:59:29,472 INFO L226 Difference]: Without dead ends: 48 [2021-11-20 06:59:29,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:59:29,474 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 34 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:59:29,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 36 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:59:29,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-20 06:59:29,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 35. [2021-11-20 06:59:29,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:59:29,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-11-20 06:59:29,492 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 32 [2021-11-20 06:59:29,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:59:29,492 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-11-20 06:59:29,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:59:29,493 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-11-20 06:59:29,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-20 06:59:29,494 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:59:29,494 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:59:29,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:59:29,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 06:59:29,715 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:59:29,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:59:29,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1789747366, now seen corresponding path program 1 times [2021-11-20 06:59:29,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:59:29,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904944928] [2021-11-20 06:59:29,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:59:29,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:59:29,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:59:29,820 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 06:59:29,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:59:29,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904944928] [2021-11-20 06:59:29,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904944928] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:59:29,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373589182] [2021-11-20 06:59:29,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:59:29,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:59:29,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:59:29,822 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:59:29,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:59:29,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:59:29,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:59:29,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:59:30,118 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 06:59:30,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:59:30,268 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 06:59:30,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373589182] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:59:30,269 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:59:30,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2021-11-20 06:59:30,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671225198] [2021-11-20 06:59:30,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:59:30,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 06:59:30,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:59:30,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 06:59:30,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:59:30,271 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:59:30,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:59:30,355 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2021-11-20 06:59:30,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:59:30,355 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-20 06:59:30,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:59:30,356 INFO L225 Difference]: With dead ends: 60 [2021-11-20 06:59:30,356 INFO L226 Difference]: Without dead ends: 40 [2021-11-20 06:59:30,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:59:30,357 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 42 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:59:30,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 64 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:59:30,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-20 06:59:30,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2021-11-20 06:59:30,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 37 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) [2021-11-20 06:59:30,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-11-20 06:59:30,363 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 32 [2021-11-20 06:59:30,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:59:30,363 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-11-20 06:59:30,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:59:30,364 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-11-20 06:59:30,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 06:59:30,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:59:30,365 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:59:30,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:59:30,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-20 06:59:30,587 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:59:30,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:59:30,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1014530160, now seen corresponding path program 2 times [2021-11-20 06:59:30,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:59:30,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291460655] [2021-11-20 06:59:30,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:59:30,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:59:30,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:59:30,667 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 06:59:30,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:59:30,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291460655] [2021-11-20 06:59:30,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291460655] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:59:30,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167766086] [2021-11-20 06:59:30,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:59:30,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:59:30,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:59:30,669 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:59:30,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:59:30,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:59:30,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:59:30,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:59:30,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:59:30,886 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 06:59:30,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:59:31,005 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 06:59:31,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167766086] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:59:31,006 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:59:31,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2021-11-20 06:59:31,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842967989] [2021-11-20 06:59:31,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:59:31,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 06:59:31,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:59:31,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 06:59:31,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:59:31,008 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:59:31,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:59:31,081 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2021-11-20 06:59:31,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:59:31,082 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 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 35 [2021-11-20 06:59:31,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:59:31,083 INFO L225 Difference]: With dead ends: 65 [2021-11-20 06:59:31,083 INFO L226 Difference]: Without dead ends: 47 [2021-11-20 06:59:31,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:59:31,084 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 68 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:59:31,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 85 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:59:31,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-20 06:59:31,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-11-20 06:59:31,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 46 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:59:31,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2021-11-20 06:59:31,098 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 35 [2021-11-20 06:59:31,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:59:31,099 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2021-11-20 06:59:31,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:59:31,099 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2021-11-20 06:59:31,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-20 06:59:31,101 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:59:31,101 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:59:31,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:59:31,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:59:31,327 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:59:31,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:59:31,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1632294897, now seen corresponding path program 3 times [2021-11-20 06:59:31,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:59:31,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796551530] [2021-11-20 06:59:31,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:59:31,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:59:31,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:59:31,439 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 06:59:31,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:59:31,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796551530] [2021-11-20 06:59:31,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796551530] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:59:31,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466303057] [2021-11-20 06:59:31,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:59:31,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:59:31,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:59:31,447 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:59:31,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:59:31,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-20 06:59:31,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:59:31,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:59:31,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:59:31,687 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-20 06:59:31,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:59:31,805 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-20 06:59:31,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466303057] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:59:31,806 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:59:31,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 14 [2021-11-20 06:59:31,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864980325] [2021-11-20 06:59:31,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:59:31,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 06:59:31,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:59:31,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 06:59:31,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:59:31,808 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:59:32,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:59:32,351 INFO L93 Difference]: Finished difference Result 171 states and 220 transitions. [2021-11-20 06:59:32,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 06:59:32,351 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-20 06:59:32,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:59:32,352 INFO L225 Difference]: With dead ends: 171 [2021-11-20 06:59:32,353 INFO L226 Difference]: Without dead ends: 144 [2021-11-20 06:59:32,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=506, Invalid=976, Unknown=0, NotChecked=0, Total=1482 [2021-11-20 06:59:32,354 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 391 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:59:32,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 50 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:59:32,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-20 06:59:32,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 107. [2021-11-20 06:59:32,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.2735849056603774) internal successors, (135), 106 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:59:32,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 135 transitions. [2021-11-20 06:59:32,368 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 135 transitions. Word has length 44 [2021-11-20 06:59:32,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:59:32,368 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 135 transitions. [2021-11-20 06:59:32,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:59:32,369 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 135 transitions. [2021-11-20 06:59:32,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-20 06:59:32,370 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:59:32,371 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:59:32,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:59:32,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:59:32,587 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:59:32,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:59:32,588 INFO L85 PathProgramCache]: Analyzing trace with hash -919071665, now seen corresponding path program 4 times [2021-11-20 06:59:32,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:59:32,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264076666] [2021-11-20 06:59:32,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:59:32,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:59:32,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:59:32,773 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 262 proven. 35 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2021-11-20 06:59:32,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:59:32,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264076666] [2021-11-20 06:59:32,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264076666] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:59:32,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289942583] [2021-11-20 06:59:32,774 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:59:32,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:59:32,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:59:32,779 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:59:32,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:59:32,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:59:32,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:59:32,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 06:59:32,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:59:33,218 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 26 proven. 228 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2021-11-20 06:59:33,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:59:33,476 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 26 proven. 228 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2021-11-20 06:59:33,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289942583] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:59:33,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:59:33,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 24 [2021-11-20 06:59:33,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086472725] [2021-11-20 06:59:33,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:59:33,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 06:59:33,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:59:33,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 06:59:33,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2021-11-20 06:59:33,479 INFO L87 Difference]: Start difference. First operand 107 states and 135 transitions. Second operand has 24 states, 24 states have (on average 4.166666666666667) internal successors, (100), 24 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:59:34,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:59:34,716 INFO L93 Difference]: Finished difference Result 322 states and 416 transitions. [2021-11-20 06:59:34,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-20 06:59:34,717 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.166666666666667) internal successors, (100), 24 states have internal predecessors, (100), 0 states have call successors, (0), 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 104 [2021-11-20 06:59:34,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:59:34,719 INFO L225 Difference]: With dead ends: 322 [2021-11-20 06:59:34,719 INFO L226 Difference]: Without dead ends: 251 [2021-11-20 06:59:34,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1362, Invalid=4644, Unknown=0, NotChecked=0, Total=6006 [2021-11-20 06:59:34,723 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 957 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 957 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:59:34,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [957 Valid, 123 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:59:34,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-11-20 06:59:34,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 131. [2021-11-20 06:59:34,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.2538461538461538) internal successors, (163), 130 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:59:34,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 163 transitions. [2021-11-20 06:59:34,754 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 163 transitions. Word has length 104 [2021-11-20 06:59:34,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:59:34,756 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 163 transitions. [2021-11-20 06:59:34,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.166666666666667) internal successors, (100), 24 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:59:34,757 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 163 transitions. [2021-11-20 06:59:34,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-20 06:59:34,767 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:59:34,767 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 6, 6, 6, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:59:34,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:59:34,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:59:34,983 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:59:34,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:59:34,984 INFO L85 PathProgramCache]: Analyzing trace with hash 964759091, now seen corresponding path program 5 times [2021-11-20 06:59:34,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:59:34,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210576813] [2021-11-20 06:59:34,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:59:34,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:59:35,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:59:35,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 367 proven. 51 refuted. 0 times theorem prover too weak. 614 trivial. 0 not checked. [2021-11-20 06:59:35,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:59:35,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210576813] [2021-11-20 06:59:35,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210576813] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:59:35,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919033390] [2021-11-20 06:59:35,246 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:59:35,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:59:35,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:59:35,247 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:59:35,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 07:05:57,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2021-11-20 07:05:57,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:05:57,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 07:05:57,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:05:58,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 614 proven. 51 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-20 07:05:58,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:05:58,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 493 proven. 172 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-20 07:05:58,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919033390] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:05:58,351 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:05:58,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2021-11-20 07:05:58,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804714409] [2021-11-20 07:05:58,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:05:58,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-20 07:05:58,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:05:58,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-20 07:05:58,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=374, Unknown=0, NotChecked=0, Total=650 [2021-11-20 07:05:58,353 INFO L87 Difference]: Start difference. First operand 131 states and 163 transitions. Second operand has 26 states, 26 states have (on average 4.230769230769231) internal successors, (110), 26 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:05:58,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:05:58,570 INFO L93 Difference]: Finished difference Result 319 states and 438 transitions. [2021-11-20 07:05:58,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 07:05:58,571 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.230769230769231) internal successors, (110), 26 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-11-20 07:05:58,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:05:58,573 INFO L225 Difference]: With dead ends: 319 [2021-11-20 07:05:58,573 INFO L226 Difference]: Without dead ends: 227 [2021-11-20 07:05:58,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=409, Invalid=647, Unknown=0, NotChecked=0, Total=1056 [2021-11-20 07:05:58,575 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 164 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:05:58,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 115 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:05:58,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-11-20 07:05:58,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2021-11-20 07:05:58,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.2876106194690264) internal successors, (291), 226 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:05:58,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 291 transitions. [2021-11-20 07:05:58,603 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 291 transitions. Word has length 128 [2021-11-20 07:05:58,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:05:58,604 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 291 transitions. [2021-11-20 07:05:58,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.230769230769231) internal successors, (110), 26 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:05:58,604 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 291 transitions. [2021-11-20 07:05:58,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-11-20 07:05:58,609 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:05:58,609 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 56, 6, 6, 6, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:05:58,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-20 07:05:58,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-20 07:05:58,835 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:05:58,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:05:58,836 INFO L85 PathProgramCache]: Analyzing trace with hash 649548339, now seen corresponding path program 6 times [2021-11-20 07:05:58,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:05:58,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113020428] [2021-11-20 07:05:58,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:05:58,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:05:58,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:05:59,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4952 backedges. 1855 proven. 287 refuted. 0 times theorem prover too weak. 2810 trivial. 0 not checked. [2021-11-20 07:05:59,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:05:59,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113020428] [2021-11-20 07:05:59,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113020428] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:05:59,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654061834] [2021-11-20 07:05:59,307 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 07:05:59,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:05:59,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:05:59,311 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:05:59,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 07:06:02,015 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-20 07:06:02,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:06:02,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 07:06:02,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:06:02,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4952 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 4901 trivial. 0 not checked. [2021-11-20 07:06:02,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:06:03,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4952 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 4901 trivial. 0 not checked. [2021-11-20 07:06:03,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654061834] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:06:03,219 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:06:03,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 10] total 34 [2021-11-20 07:06:03,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978879552] [2021-11-20 07:06:03,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:06:03,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-20 07:06:03,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:06:03,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-20 07:06:03,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=799, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 07:06:03,223 INFO L87 Difference]: Start difference. First operand 227 states and 291 transitions. Second operand has 34 states, 34 states have (on average 4.0) internal successors, (136), 34 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:06:12,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:06:12,323 INFO L93 Difference]: Finished difference Result 1116 states and 1464 transitions. [2021-11-20 07:06:12,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 242 states. [2021-11-20 07:06:12,323 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.0) internal successors, (136), 34 states have internal predecessors, (136), 0 states have call successors, (0), 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 224 [2021-11-20 07:06:12,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:06:12,330 INFO L225 Difference]: With dead ends: 1116 [2021-11-20 07:06:12,330 INFO L226 Difference]: Without dead ends: 952 [2021-11-20 07:06:12,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 689 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 256 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25591 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=18859, Invalid=47447, Unknown=0, NotChecked=0, Total=66306 [2021-11-20 07:06:12,359 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 3275 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 1009 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3275 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 1307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1009 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:06:12,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3275 Valid, 131 Invalid, 1307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1009 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 07:06:12,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2021-11-20 07:06:12,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 263. [2021-11-20 07:06:12,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.2633587786259541) internal successors, (331), 262 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:06:12,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 331 transitions. [2021-11-20 07:06:12,384 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 331 transitions. Word has length 224 [2021-11-20 07:06:12,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:06:12,385 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 331 transitions. [2021-11-20 07:06:12,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.0) internal successors, (136), 34 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:06:12,385 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 331 transitions. [2021-11-20 07:06:12,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-11-20 07:06:12,389 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:06:12,389 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 60, 14, 14, 14, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:06:12,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 07:06:12,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 07:06:12,599 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:06:12,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:06:12,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1761221199, now seen corresponding path program 7 times [2021-11-20 07:06:12,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:06:12,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362445981] [2021-11-20 07:06:12,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:12,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:06:12,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:13,136 INFO L134 CoverageAnalysis]: Checked inductivity of 5894 backedges. 2122 proven. 330 refuted. 0 times theorem prover too weak. 3442 trivial. 0 not checked. [2021-11-20 07:06:13,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:06:13,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362445981] [2021-11-20 07:06:13,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362445981] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:06:13,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911503349] [2021-11-20 07:06:13,137 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 07:06:13,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:06:13,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:06:13,143 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:06:13,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 07:06:13,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:13,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 1346 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 07:06:13,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:06:14,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5894 backedges. 2122 proven. 330 refuted. 0 times theorem prover too weak. 3442 trivial. 0 not checked. [2021-11-20 07:06:14,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:06:15,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5894 backedges. 2122 proven. 330 refuted. 0 times theorem prover too weak. 3442 trivial. 0 not checked. [2021-11-20 07:06:15,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911503349] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:06:15,089 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:06:15,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 53 [2021-11-20 07:06:15,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965042642] [2021-11-20 07:06:15,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:06:15,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-20 07:06:15,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:06:15,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-20 07:06:15,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1062, Invalid=1694, Unknown=0, NotChecked=0, Total=2756 [2021-11-20 07:06:15,092 INFO L87 Difference]: Start difference. First operand 263 states and 331 transitions. Second operand has 53 states, 53 states have (on average 3.3773584905660377) internal successors, (179), 53 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:06:15,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:06:15,322 INFO L93 Difference]: Finished difference Result 520 states and 678 transitions. [2021-11-20 07:06:15,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 07:06:15,323 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.3773584905660377) internal successors, (179), 53 states have internal predecessors, (179), 0 states have call successors, (0), 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 260 [2021-11-20 07:06:15,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:06:15,325 INFO L225 Difference]: With dead ends: 520 [2021-11-20 07:06:15,325 INFO L226 Difference]: Without dead ends: 323 [2021-11-20 07:06:15,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1303 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1162, Invalid=2030, Unknown=0, NotChecked=0, Total=3192 [2021-11-20 07:06:15,328 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 175 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:06:15,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 187 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:06:15,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-11-20 07:06:15,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2021-11-20 07:06:15,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.2763975155279503) internal successors, (411), 322 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:06:15,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 411 transitions. [2021-11-20 07:06:15,353 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 411 transitions. Word has length 260 [2021-11-20 07:06:15,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:06:15,353 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 411 transitions. [2021-11-20 07:06:15,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.3773584905660377) internal successors, (179), 53 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:06:15,354 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 411 transitions. [2021-11-20 07:06:15,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2021-11-20 07:06:15,358 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:06:15,359 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 80, 14, 14, 14, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:06:15,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 07:06:15,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 07:06:15,587 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:06:15,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:06:15,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1030632653, now seen corresponding path program 8 times [2021-11-20 07:06:15,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:06:15,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690025021] [2021-11-20 07:06:15,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:15,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:06:15,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:16,078 INFO L134 CoverageAnalysis]: Checked inductivity of 10144 backedges. 0 proven. 7462 refuted. 0 times theorem prover too weak. 2682 trivial. 0 not checked. [2021-11-20 07:06:16,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:06:16,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690025021] [2021-11-20 07:06:16,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690025021] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:06:16,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023044784] [2021-11-20 07:06:16,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:06:16,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:06:16,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:06:16,080 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:06:16,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 07:06:16,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:06:16,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:06:16,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 1646 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 07:06:16,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:06:17,837 INFO L134 CoverageAnalysis]: Checked inductivity of 10144 backedges. 0 proven. 7462 refuted. 0 times theorem prover too weak. 2682 trivial. 0 not checked. [2021-11-20 07:06:17,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:06:18,584 INFO L134 CoverageAnalysis]: Checked inductivity of 10144 backedges. 0 proven. 7462 refuted. 0 times theorem prover too weak. 2682 trivial. 0 not checked. [2021-11-20 07:06:18,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023044784] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:06:18,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:06:18,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2021-11-20 07:06:18,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403865602] [2021-11-20 07:06:18,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:06:18,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 07:06:18,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:06:18,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 07:06:18,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-11-20 07:06:18,587 INFO L87 Difference]: Start difference. First operand 323 states and 411 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:06:18,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:06:18,751 INFO L93 Difference]: Finished difference Result 462 states and 573 transitions. [2021-11-20 07:06:18,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:06:18,752 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 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 320 [2021-11-20 07:06:18,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:06:18,755 INFO L225 Difference]: With dead ends: 462 [2021-11-20 07:06:18,756 INFO L226 Difference]: Without dead ends: 411 [2021-11-20 07:06:18,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 629 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-11-20 07:06:18,759 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 188 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:06:18,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 103 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:06:18,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-11-20 07:06:18,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 386. [2021-11-20 07:06:18,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 1.2857142857142858) internal successors, (495), 385 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:06:18,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 495 transitions. [2021-11-20 07:06:18,791 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 495 transitions. Word has length 320 [2021-11-20 07:06:18,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:06:18,791 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 495 transitions. [2021-11-20 07:06:18,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:06:18,792 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 495 transitions. [2021-11-20 07:06:18,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2021-11-20 07:06:18,799 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:06:18,800 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 100, 14, 14, 14, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:06:18,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 07:06:19,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-20 07:06:19,027 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:06:19,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:06:19,027 INFO L85 PathProgramCache]: Analyzing trace with hash -974828135, now seen corresponding path program 9 times [2021-11-20 07:06:19,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:06:19,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432845381] [2021-11-20 07:06:19,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:19,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:06:19,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:19,752 INFO L134 CoverageAnalysis]: Checked inductivity of 15707 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2021-11-20 07:06:19,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:06:19,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432845381] [2021-11-20 07:06:19,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432845381] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:06:19,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48752244] [2021-11-20 07:06:19,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:06:19,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:06:19,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:06:19,754 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:06:19,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 07:06:20,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-20 07:06:20,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:06:20,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-20 07:06:20,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:06:20,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-20 07:06:20,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:20,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:20,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:20,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:06:20,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:06:20,981 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 07:06:20,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 58 [2021-11-20 07:06:21,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:21,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:21,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:21,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:21,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:06:21,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:06:21,219 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 07:06:21,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 55 treesize of output 66 [2021-11-20 07:06:21,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:21,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:21,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:21,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:21,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:06:21,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:06:21,506 INFO L354 Elim1Store]: treesize reduction 72, result has 24.2 percent of original size [2021-11-20 07:06:21,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 66 treesize of output 86 [2021-11-20 07:06:21,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:21,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:21,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:21,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:21,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:06:21,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:06:21,881 INFO L354 Elim1Store]: treesize reduction 124, result has 26.2 percent of original size [2021-11-20 07:06:21,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 83 treesize of output 116 [2021-11-20 07:06:22,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:22,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:22,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:22,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:22,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:22,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:06:22,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:06:22,536 INFO L354 Elim1Store]: treesize reduction 169, result has 20.7 percent of original size [2021-11-20 07:06:22,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 13 case distinctions, treesize of input 115 treesize of output 133 [2021-11-20 07:06:25,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:06:25,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:25,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:25,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:25,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:06:25,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:25,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:06:25,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:06:25,391 INFO L354 Elim1Store]: treesize reduction 380, result has 25.8 percent of original size [2021-11-20 07:06:25,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 5 disjoint index pairs (out of 66 index pairs), introduced 11 new quantified variables, introduced 31 case distinctions, treesize of input 156 treesize of output 233 [2021-11-20 07:06:51,415 INFO L354 Elim1Store]: treesize reduction 912, result has 29.0 percent of original size [2021-11-20 07:06:51,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 1 disjoint index pairs (out of 120 index pairs), introduced 18 new quantified variables, introduced 120 case distinctions, treesize of input 499 treesize of output 607 [2021-11-20 07:07:13,224 INFO L134 CoverageAnalysis]: Checked inductivity of 15707 backedges. 509 proven. 34 refuted. 0 times theorem prover too weak. 15164 trivial. 0 not checked. [2021-11-20 07:07:13,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:07:22,142 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~x~0#1_420| Int)) (or (forall ((|ULTIMATE.start_main_~y~0#1| Int)) (let ((.cse2 (* |c_ULTIMATE.start_main_~j~0#1| 4))) (let ((.cse0 (let ((.cse3 (select |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base|))) (store .cse3 (+ (* |v_ULTIMATE.start_main_~x~0#1_420| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|) (+ (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#Weight~0#1.base|) (+ |c_ULTIMATE.start_main_~#Weight~0#1.offset| .cse2)) (select .cse3 (+ (* |ULTIMATE.start_main_~y~0#1| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|))))))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base| .cse0))) (<= (select .cse0 (+ (* (select (select .cse1 |c_ULTIMATE.start_main_~#Dest~0#1.base|) (+ |c_ULTIMATE.start_main_~#Dest~0#1.offset| 4 .cse2)) 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|)) (+ (select (select .cse1 |c_ULTIMATE.start_main_~#Weight~0#1.base|) (+ |c_ULTIMATE.start_main_~#Weight~0#1.offset| 4 .cse2)) (select .cse0 (+ (* (select (select .cse1 |c_ULTIMATE.start_main_~#Source~0#1.base|) (+ |c_ULTIMATE.start_main_~#Source~0#1.offset| 4 .cse2)) 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|)))))))) (< (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#Dest~0#1.base|) (+ |c_ULTIMATE.start_main_~#Dest~0#1.offset| (* |c_ULTIMATE.start_main_~j~0#1| 4))) |v_ULTIMATE.start_main_~x~0#1_420|))) is different from false [2021-11-20 07:07:24,167 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~y~0#1| Int) (|v_ULTIMATE.start_main_~x~0#1_420| Int)) (or (< (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#Dest~0#1.base|) |c_ULTIMATE.start_main_~#Dest~0#1.offset|) |v_ULTIMATE.start_main_~x~0#1_420|) (let ((.cse0 (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base|))) (store .cse2 (+ (* |v_ULTIMATE.start_main_~x~0#1_420| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|) (+ (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#Weight~0#1.base|) |c_ULTIMATE.start_main_~#Weight~0#1.offset|) (select .cse2 (+ (* |ULTIMATE.start_main_~y~0#1| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|))))))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base| .cse0))) (<= (select .cse0 (+ (* (select (select .cse1 |c_ULTIMATE.start_main_~#Dest~0#1.base|) (+ |c_ULTIMATE.start_main_~#Dest~0#1.offset| 4)) 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|)) (+ (select (select .cse1 |c_ULTIMATE.start_main_~#Weight~0#1.base|) (+ |c_ULTIMATE.start_main_~#Weight~0#1.offset| 4)) (select .cse0 (+ (* (select (select .cse1 |c_ULTIMATE.start_main_~#Source~0#1.base|) (+ |c_ULTIMATE.start_main_~#Source~0#1.offset| 4)) 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|)))))))) is different from false [2021-11-20 07:07:38,895 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (or (forall ((|ULTIMATE.start_main_~y~0#1| Int) (|v_ULTIMATE.start_main_~x~0#1_420| Int)) (let ((.cse2 (let ((.cse4 (* |ULTIMATE.start_main_~i~0#1| 4))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base|) (+ .cse4 |c_ULTIMATE.start_main_~#distance~0#1.offset|) c_~INFINITY~0) (+ .cse4 4 |c_ULTIMATE.start_main_~#distance~0#1.offset|) c_~INFINITY~0)))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base| .cse2))) (or (let ((.cse0 (store .cse2 (+ (* |v_ULTIMATE.start_main_~x~0#1_420| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|) (+ (select .cse2 (+ (* |ULTIMATE.start_main_~y~0#1| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|)) (select (select .cse3 |c_ULTIMATE.start_main_~#Weight~0#1.base|) |c_ULTIMATE.start_main_~#Weight~0#1.offset|))))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base| .cse0))) (<= (select .cse0 (+ (* (select (select .cse1 |c_ULTIMATE.start_main_~#Dest~0#1.base|) (+ |c_ULTIMATE.start_main_~#Dest~0#1.offset| 4)) 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|)) (+ (select (select .cse1 |c_ULTIMATE.start_main_~#Weight~0#1.base|) (+ |c_ULTIMATE.start_main_~#Weight~0#1.offset| 4)) (select .cse0 (+ (* (select (select .cse1 |c_ULTIMATE.start_main_~#Source~0#1.base|) (+ |c_ULTIMATE.start_main_~#Source~0#1.offset| 4)) 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|)))))) (< (select (select .cse3 |c_ULTIMATE.start_main_~#Dest~0#1.base|) |c_ULTIMATE.start_main_~#Dest~0#1.offset|) |v_ULTIMATE.start_main_~x~0#1_420|))))) (< (+ 2 |ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~nodecount~0#1|) (<= |c_ULTIMATE.start_main_~nodecount~0#1| (+ |ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2021-11-20 07:07:41,178 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~y~0#1| Int) (|ULTIMATE.start_main_~i~0#1| Int) (|v_ULTIMATE.start_main_~i~0#1_212| Int) (|v_ULTIMATE.start_main_~x~0#1_420| Int)) (let ((.cse3 (let ((.cse4 (* |v_ULTIMATE.start_main_~i~0#1_212| 4))) (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|) c_~INFINITY~0) (+ .cse4 |c_ULTIMATE.start_main_~#distance~0#1.offset|) c_~INFINITY~0) (+ .cse4 4 |c_ULTIMATE.start_main_~#distance~0#1.offset|) c_~INFINITY~0)))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base| .cse3))) (or (< (+ 2 |v_ULTIMATE.start_main_~i~0#1_212|) |c_ULTIMATE.start_main_~nodecount~0#1|) (< (select (select .cse0 |c_ULTIMATE.start_main_~#Dest~0#1.base|) |c_ULTIMATE.start_main_~#Dest~0#1.offset|) |v_ULTIMATE.start_main_~x~0#1_420|) (<= |c_ULTIMATE.start_main_~nodecount~0#1| (+ |v_ULTIMATE.start_main_~i~0#1_212| 1)) (let ((.cse1 (store .cse3 (+ (* |v_ULTIMATE.start_main_~x~0#1_420| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|) (+ (select (select .cse0 |c_ULTIMATE.start_main_~#Weight~0#1.base|) |c_ULTIMATE.start_main_~#Weight~0#1.offset|) (select .cse3 (+ (* |ULTIMATE.start_main_~y~0#1| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|)))))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base| .cse1))) (<= (select .cse1 (+ (* (select (select .cse2 |c_ULTIMATE.start_main_~#Dest~0#1.base|) (+ |c_ULTIMATE.start_main_~#Dest~0#1.offset| 4)) 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|)) (+ (select .cse1 (+ (* (select (select .cse2 |c_ULTIMATE.start_main_~#Source~0#1.base|) (+ |c_ULTIMATE.start_main_~#Source~0#1.offset| 4)) 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|)) (select (select .cse2 |c_ULTIMATE.start_main_~#Weight~0#1.base|) (+ |c_ULTIMATE.start_main_~#Weight~0#1.offset| 4)))))))))) is different from false [2021-11-20 07:07:43,606 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~y~0#1| Int) (|v_ULTIMATE.start_main_~i~0#1_212| Int) (|v_ULTIMATE.start_main_~x~0#1_420| Int) (|v_ULTIMATE.start_main_~i~0#1_214| Int) (~INFINITY~0 Int)) (let ((.cse3 (let ((.cse4 (* |v_ULTIMATE.start_main_~i~0#1_212| 4))) (store (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|) ~INFINITY~0) (+ (* |v_ULTIMATE.start_main_~i~0#1_214| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|) ~INFINITY~0) (+ .cse4 |c_ULTIMATE.start_main_~#distance~0#1.offset|) ~INFINITY~0) (+ .cse4 4 |c_ULTIMATE.start_main_~#distance~0#1.offset|) ~INFINITY~0)))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base| .cse3))) (or (< (+ 2 |v_ULTIMATE.start_main_~i~0#1_212|) |c_ULTIMATE.start_main_~nodecount~0#1|) (< (select (select .cse0 |c_ULTIMATE.start_main_~#Dest~0#1.base|) |c_ULTIMATE.start_main_~#Dest~0#1.offset|) |v_ULTIMATE.start_main_~x~0#1_420|) (let ((.cse1 (store .cse3 (+ (* |v_ULTIMATE.start_main_~x~0#1_420| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|) (+ (select .cse3 (+ (* |ULTIMATE.start_main_~y~0#1| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|)) (select (select .cse0 |c_ULTIMATE.start_main_~#Weight~0#1.base|) |c_ULTIMATE.start_main_~#Weight~0#1.offset|))))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base| .cse1))) (<= (select .cse1 (+ (* (select (select .cse2 |c_ULTIMATE.start_main_~#Dest~0#1.base|) (+ |c_ULTIMATE.start_main_~#Dest~0#1.offset| 4)) 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|)) (+ (select .cse1 (+ (* (select (select .cse2 |c_ULTIMATE.start_main_~#Source~0#1.base|) (+ |c_ULTIMATE.start_main_~#Source~0#1.offset| 4)) 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|)) (select (select .cse2 |c_ULTIMATE.start_main_~#Weight~0#1.base|) (+ |c_ULTIMATE.start_main_~#Weight~0#1.offset| 4)))))) (<= |c_ULTIMATE.start_main_~nodecount~0#1| (+ |v_ULTIMATE.start_main_~i~0#1_212| 1)))))) is different from false [2021-11-20 07:07:45,950 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~y~0#1| Int) (|v_ULTIMATE.start_main_~i~0#1_212| Int) (|v_ULTIMATE.start_main_~x~0#1_420| Int) (|v_ULTIMATE.start_main_~i~0#1_214| Int) (~INFINITY~0 Int)) (let ((.cse2 (let ((.cse4 (* |v_ULTIMATE.start_main_~i~0#1_212| 4))) (store (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) 4 |c_ULTIMATE.start_main_~#distance~0#1.offset|) ~INFINITY~0) (+ (* |v_ULTIMATE.start_main_~i~0#1_214| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|) ~INFINITY~0) (+ .cse4 |c_ULTIMATE.start_main_~#distance~0#1.offset|) ~INFINITY~0) (+ .cse4 4 |c_ULTIMATE.start_main_~#distance~0#1.offset|) ~INFINITY~0)))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base| .cse2))) (or (let ((.cse0 (store .cse2 (+ (* |v_ULTIMATE.start_main_~x~0#1_420| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|) (+ (select .cse2 (+ (* |ULTIMATE.start_main_~y~0#1| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|)) (select (select .cse3 |c_ULTIMATE.start_main_~#Weight~0#1.base|) |c_ULTIMATE.start_main_~#Weight~0#1.offset|))))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base| .cse0))) (<= (select .cse0 (+ (* (select (select .cse1 |c_ULTIMATE.start_main_~#Dest~0#1.base|) (+ |c_ULTIMATE.start_main_~#Dest~0#1.offset| 4)) 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|)) (+ (select (select .cse1 |c_ULTIMATE.start_main_~#Weight~0#1.base|) (+ |c_ULTIMATE.start_main_~#Weight~0#1.offset| 4)) (select .cse0 (+ (* (select (select .cse1 |c_ULTIMATE.start_main_~#Source~0#1.base|) (+ |c_ULTIMATE.start_main_~#Source~0#1.offset| 4)) 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|)))))) (< (+ 2 |v_ULTIMATE.start_main_~i~0#1_212|) |c_ULTIMATE.start_main_~nodecount~0#1|) (< (select (select .cse3 |c_ULTIMATE.start_main_~#Dest~0#1.base|) |c_ULTIMATE.start_main_~#Dest~0#1.offset|) |v_ULTIMATE.start_main_~x~0#1_420|) (<= |c_ULTIMATE.start_main_~nodecount~0#1| (+ |v_ULTIMATE.start_main_~i~0#1_212| 1)))))) is different from false [2021-11-20 07:08:06,953 INFO L134 CoverageAnalysis]: Checked inductivity of 15707 backedges. 506 proven. 6 refuted. 0 times theorem prover too weak. 15164 trivial. 31 not checked. [2021-11-20 07:08:06,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48752244] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:08:06,954 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:08:06,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 50 [2021-11-20 07:08:06,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748120287] [2021-11-20 07:08:06,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:08:06,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-20 07:08:06,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:08:06,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-20 07:08:06,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=1613, Unknown=23, NotChecked=534, Total=2450 [2021-11-20 07:08:06,959 INFO L87 Difference]: Start difference. First operand 386 states and 495 transitions. Second operand has 50 states, 50 states have (on average 2.46) internal successors, (123), 50 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:08:38,601 WARN L227 SmtUtils]: Spent 10.17s on a formula simplification. DAG size of input: 135 DAG size of output: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:09:14,951 WARN L227 SmtUtils]: Spent 12.19s on a formula simplification. DAG size of input: 136 DAG size of output: 99 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:09:27,201 WARN L227 SmtUtils]: Spent 10.15s on a formula simplification. DAG size of input: 113 DAG size of output: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:09:29,834 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#Dest~0#1.base|))) (and (= |c_ULTIMATE.start_main_~#Weight~0#1.offset| 0) (<= (select .cse0 |c_ULTIMATE.start_main_~#Dest~0#1.offset|) 1) (= 20 |c_ULTIMATE.start_main_~edgecount~0#1|) (not (= |c_ULTIMATE.start_main_~#distance~0#1.base| |c_ULTIMATE.start_main_~#Source~0#1.base|)) (= |c_ULTIMATE.start_main_~#Dest~0#1.offset| 0) (<= 1 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#Weight~0#1.base|) (+ |c_ULTIMATE.start_main_~#Weight~0#1.offset| 4))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#Source~0#1.base|) (+ |c_ULTIMATE.start_main_~#Source~0#1.offset| 4)) 4) (forall ((|ULTIMATE.start_main_~y~0#1| Int) (|v_ULTIMATE.start_main_~x~0#1_420| Int)) (or (< (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#Dest~0#1.base|) |c_ULTIMATE.start_main_~#Dest~0#1.offset|) |v_ULTIMATE.start_main_~x~0#1_420|) (let ((.cse1 (let ((.cse3 (select |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base|))) (store .cse3 (+ (* |v_ULTIMATE.start_main_~x~0#1_420| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|) (+ (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#Weight~0#1.base|) |c_ULTIMATE.start_main_~#Weight~0#1.offset|) (select .cse3 (+ (* |ULTIMATE.start_main_~y~0#1| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|))))))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base| .cse1))) (<= (select .cse1 (+ (* (select (select .cse2 |c_ULTIMATE.start_main_~#Dest~0#1.base|) (+ |c_ULTIMATE.start_main_~#Dest~0#1.offset| 4)) 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|)) (+ (select (select .cse2 |c_ULTIMATE.start_main_~#Weight~0#1.base|) (+ |c_ULTIMATE.start_main_~#Weight~0#1.offset| 4)) (select .cse1 (+ (* (select (select .cse2 |c_ULTIMATE.start_main_~#Source~0#1.base|) (+ |c_ULTIMATE.start_main_~#Source~0#1.offset| 4)) 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|)))))))) (= |c_ULTIMATE.start_main_~#distance~0#1.offset| 0) (not (= |c_ULTIMATE.start_main_~#distance~0#1.base| |c_ULTIMATE.start_main_~#Weight~0#1.base|)) (= |c_ULTIMATE.start_main_~#Source~0#1.offset| 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~#Dest~0#1.offset| 4)) 3) (exists ((|v_ULTIMATE.start_main_~i~0#1_186| Int) (|v_ULTIMATE.start_main_~i~0#1_184| Int)) (let ((.cse5 (select |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base|)) (.cse6 (* |v_ULTIMATE.start_main_~i~0#1_186| 4))) (let ((.cse4 (select .cse5 (+ .cse6 (- 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|)))) (and (<= 4 |v_ULTIMATE.start_main_~i~0#1_186|) (= .cse4 (select .cse5 (+ (* |v_ULTIMATE.start_main_~i~0#1_184| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|))) (= .cse4 (select .cse5 (+ 4 |c_ULTIMATE.start_main_~#distance~0#1.offset|))) (< |v_ULTIMATE.start_main_~i~0#1_186| 5) (or (= (* 4 |v_ULTIMATE.start_main_~i~0#1_184|) 0) (= (select .cse5 |c_ULTIMATE.start_main_~#distance~0#1.offset|) 0)) (= .cse4 (select .cse5 (+ .cse6 |c_ULTIMATE.start_main_~#distance~0#1.offset|))))))) (not (= |c_ULTIMATE.start_main_~#distance~0#1.base| |c_ULTIMATE.start_main_~#Dest~0#1.base|)))) is different from false [2021-11-20 07:09:31,842 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse4 (select |c_#memory_int| |c_ULTIMATE.start_main_~#Dest~0#1.base|))) (and (= |c_ULTIMATE.start_main_~#Weight~0#1.offset| 0) (forall ((|v_ULTIMATE.start_main_~x~0#1_420| Int)) (or (forall ((|ULTIMATE.start_main_~y~0#1| Int)) (let ((.cse2 (* |c_ULTIMATE.start_main_~j~0#1| 4))) (let ((.cse0 (let ((.cse3 (select |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base|))) (store .cse3 (+ (* |v_ULTIMATE.start_main_~x~0#1_420| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|) (+ (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#Weight~0#1.base|) (+ |c_ULTIMATE.start_main_~#Weight~0#1.offset| .cse2)) (select .cse3 (+ (* |ULTIMATE.start_main_~y~0#1| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|))))))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base| .cse0))) (<= (select .cse0 (+ (* (select (select .cse1 |c_ULTIMATE.start_main_~#Dest~0#1.base|) (+ |c_ULTIMATE.start_main_~#Dest~0#1.offset| 4 .cse2)) 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|)) (+ (select (select .cse1 |c_ULTIMATE.start_main_~#Weight~0#1.base|) (+ |c_ULTIMATE.start_main_~#Weight~0#1.offset| 4 .cse2)) (select .cse0 (+ (* (select (select .cse1 |c_ULTIMATE.start_main_~#Source~0#1.base|) (+ |c_ULTIMATE.start_main_~#Source~0#1.offset| 4 .cse2)) 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|)))))))) (< (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#Dest~0#1.base|) (+ |c_ULTIMATE.start_main_~#Dest~0#1.offset| (* |c_ULTIMATE.start_main_~j~0#1| 4))) |v_ULTIMATE.start_main_~x~0#1_420|))) (<= (select .cse4 |c_ULTIMATE.start_main_~#Dest~0#1.offset|) 1) (= 20 |c_ULTIMATE.start_main_~edgecount~0#1|) (not (= |c_ULTIMATE.start_main_~#distance~0#1.base| |c_ULTIMATE.start_main_~#Source~0#1.base|)) (= |c_ULTIMATE.start_main_~#Dest~0#1.offset| 0) (<= 1 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#Weight~0#1.base|) (+ |c_ULTIMATE.start_main_~#Weight~0#1.offset| 4))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#Source~0#1.base|) (+ |c_ULTIMATE.start_main_~#Source~0#1.offset| 4)) 4) (= |c_ULTIMATE.start_main_~#distance~0#1.offset| 0) (not (= |c_ULTIMATE.start_main_~#distance~0#1.base| |c_ULTIMATE.start_main_~#Weight~0#1.base|)) (= |c_ULTIMATE.start_main_~#Source~0#1.offset| 0) (= (select .cse4 (+ |c_ULTIMATE.start_main_~#Dest~0#1.offset| 4)) 3) (exists ((|v_ULTIMATE.start_main_~i~0#1_186| Int) (|v_ULTIMATE.start_main_~i~0#1_184| Int)) (let ((.cse6 (select |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base|)) (.cse7 (* |v_ULTIMATE.start_main_~i~0#1_186| 4))) (let ((.cse5 (select .cse6 (+ .cse7 (- 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|)))) (and (<= 4 |v_ULTIMATE.start_main_~i~0#1_186|) (= .cse5 (select .cse6 (+ (* |v_ULTIMATE.start_main_~i~0#1_184| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|))) (= .cse5 (select .cse6 (+ 4 |c_ULTIMATE.start_main_~#distance~0#1.offset|))) (< |v_ULTIMATE.start_main_~i~0#1_186| 5) (or (= (* 4 |v_ULTIMATE.start_main_~i~0#1_184|) 0) (= (select .cse6 |c_ULTIMATE.start_main_~#distance~0#1.offset|) 0)) (= .cse5 (select .cse6 (+ .cse7 |c_ULTIMATE.start_main_~#distance~0#1.offset|))))))) (= |c_ULTIMATE.start_main_~j~0#1| 0) (not (= |c_ULTIMATE.start_main_~#distance~0#1.base| |c_ULTIMATE.start_main_~#Dest~0#1.base|)))) is different from false [2021-11-20 07:09:32,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:09:32,810 INFO L93 Difference]: Finished difference Result 1114 states and 1415 transitions. [2021-11-20 07:09:32,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-20 07:09:32,811 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.46) internal successors, (123), 50 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 383 [2021-11-20 07:09:32,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:09:32,816 INFO L225 Difference]: With dead ends: 1114 [2021-11-20 07:09:32,816 INFO L226 Difference]: Without dead ends: 753 [2021-11-20 07:09:32,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 805 GetRequests, 738 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 138.9s TimeCoverageRelationStatistics Valid=586, Invalid=2945, Unknown=41, NotChecked=984, Total=4556 [2021-11-20 07:09:32,818 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 294 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 934 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:09:32,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 233 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 257 Invalid, 0 Unknown, 934 Unchecked, 0.3s Time] [2021-11-20 07:09:32,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-11-20 07:09:32,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 410. [2021-11-20 07:09:32,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.273838630806846) internal successors, (521), 409 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:09:32,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 521 transitions. [2021-11-20 07:09:32,855 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 521 transitions. Word has length 383 [2021-11-20 07:09:32,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:09:32,856 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 521 transitions. [2021-11-20 07:09:32,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.46) internal successors, (123), 50 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:09:32,856 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 521 transitions. [2021-11-20 07:09:32,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2021-11-20 07:09:32,859 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:09:32,859 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 99, 15, 15, 15, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:09:32,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 07:09:33,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 07:09:33,075 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:09:33,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:09:33,076 INFO L85 PathProgramCache]: Analyzing trace with hash -639451473, now seen corresponding path program 1 times [2021-11-20 07:09:33,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:09:33,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672423796] [2021-11-20 07:09:33,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:09:33,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:09:33,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:33,900 INFO L134 CoverageAnalysis]: Checked inductivity of 15750 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2021-11-20 07:09:33,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:09:33,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672423796] [2021-11-20 07:09:33,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672423796] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:09:33,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935320463] [2021-11-20 07:09:33,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:09:33,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:09:33,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:09:33,902 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:09:33,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 07:09:34,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:34,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 1965 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 07:09:34,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:09:35,621 INFO L134 CoverageAnalysis]: Checked inductivity of 15750 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2021-11-20 07:09:35,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:09:36,829 INFO L134 CoverageAnalysis]: Checked inductivity of 15750 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2021-11-20 07:09:36,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935320463] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:09:36,830 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:09:36,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 53 [2021-11-20 07:09:36,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442170312] [2021-11-20 07:09:36,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:09:36,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-20 07:09:36,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:09:36,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-20 07:09:36,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1062, Invalid=1694, Unknown=0, NotChecked=0, Total=2756 [2021-11-20 07:09:36,832 INFO L87 Difference]: Start difference. First operand 410 states and 521 transitions. Second operand has 53 states, 53 states have (on average 3.6037735849056602) internal successors, (191), 53 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:09:37,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:09:37,936 INFO L93 Difference]: Finished difference Result 1698 states and 2195 transitions. [2021-11-20 07:09:37,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 07:09:37,937 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.6037735849056602) internal successors, (191), 53 states have internal predecessors, (191), 0 states have call successors, (0), 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 386 [2021-11-20 07:09:37,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:09:37,946 INFO L225 Difference]: With dead ends: 1698 [2021-11-20 07:09:37,947 INFO L226 Difference]: Without dead ends: 1691 [2021-11-20 07:09:37,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 793 GetRequests, 738 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1303 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1162, Invalid=2030, Unknown=0, NotChecked=0, Total=3192 [2021-11-20 07:09:37,948 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1354 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 440 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1354 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 440 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:09:37,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1354 Valid, 283 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [440 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 07:09:37,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1691 states. [2021-11-20 07:09:37,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1691 to 425. [2021-11-20 07:09:37,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 1.2641509433962264) internal successors, (536), 424 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:09:38,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 536 transitions. [2021-11-20 07:09:38,013 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 536 transitions. Word has length 386 [2021-11-20 07:09:38,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:09:38,014 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 536 transitions. [2021-11-20 07:09:38,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.6037735849056602) internal successors, (191), 53 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:09:38,014 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 536 transitions. [2021-11-20 07:09:38,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2021-11-20 07:09:38,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:09:38,017 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 99, 20, 20, 20, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:09:38,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-20 07:09:38,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f81bb23-11f1-40ca-9bef-5ac5abd5ba5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 07:09:38,219 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:09:38,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:09:38,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1937318555, now seen corresponding path program 2 times [2021-11-20 07:09:38,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:09:38,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564729432] [2021-11-20 07:09:38,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:09:38,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms