./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-new/count_by_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-new/count_by_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G --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 86d4e5d9ff4808cbd51f54a8e918c7da7f8f3d0797ade1f0adcb3da91d131026 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 14:14:22,677 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 14:14:22,679 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 14:14:22,710 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 14:14:22,711 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 14:14:22,713 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 14:14:22,714 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 14:14:22,717 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 14:14:22,719 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 14:14:22,720 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 14:14:22,722 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 14:14:22,723 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 14:14:22,724 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 14:14:22,728 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 14:14:22,731 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 14:14:22,733 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 14:14:22,735 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 14:14:22,740 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 14:14:22,744 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 14:14:22,748 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 14:14:22,753 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 14:14:22,755 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 14:14:22,759 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 14:14:22,760 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 14:14:22,771 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 14:14:22,772 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 14:14:22,772 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 14:14:22,774 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 14:14:22,775 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 14:14:22,777 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 14:14:22,777 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 14:14:22,778 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 14:14:22,780 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 14:14:22,781 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 14:14:22,783 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 14:14:22,783 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 14:14:22,784 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 14:14:22,785 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 14:14:22,785 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 14:14:22,786 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 14:14:22,787 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 14:14:22,788 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 14:14:22,838 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 14:14:22,838 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 14:14:22,839 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 14:14:22,839 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 14:14:22,846 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 14:14:22,847 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 14:14:22,847 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 14:14:22,848 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 14:14:22,848 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 14:14:22,848 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 14:14:22,849 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 14:14:22,850 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 14:14:22,850 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 14:14:22,850 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 14:14:22,850 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 14:14:22,850 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 14:14:22,851 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 14:14:22,851 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 14:14:22,851 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 14:14:22,851 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 14:14:22,852 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 14:14:22,852 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 14:14:22,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 14:14:22,852 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 14:14:22,853 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 14:14:22,853 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 14:14:22,853 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 14:14:22,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 14:14:22,854 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 14:14:22,855 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 14:14:22,855 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 14:14:22,856 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 14:14:22,856 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_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 86d4e5d9ff4808cbd51f54a8e918c7da7f8f3d0797ade1f0adcb3da91d131026 [2021-11-23 14:14:23,148 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 14:14:23,181 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 14:14:23,183 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 14:14:23,184 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 14:14:23,185 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 14:14:23,186 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/loop-new/count_by_2.i [2021-11-23 14:14:23,260 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/data/a38ca18eb/43ef13bec6c04423807bd2cf921173c9/FLAG3c9f34539 [2021-11-23 14:14:23,759 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 14:14:23,760 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/sv-benchmarks/c/loop-new/count_by_2.i [2021-11-23 14:14:23,770 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/data/a38ca18eb/43ef13bec6c04423807bd2cf921173c9/FLAG3c9f34539 [2021-11-23 14:14:24,138 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/data/a38ca18eb/43ef13bec6c04423807bd2cf921173c9 [2021-11-23 14:14:24,140 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 14:14:24,142 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 14:14:24,143 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 14:14:24,143 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 14:14:24,147 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 14:14:24,148 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:14:24" (1/1) ... [2021-11-23 14:14:24,149 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c9668b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:24, skipping insertion in model container [2021-11-23 14:14:24,149 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:14:24" (1/1) ... [2021-11-23 14:14:24,161 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 14:14:24,175 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 14:14:24,318 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_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/sv-benchmarks/c/loop-new/count_by_2.i[891,904] [2021-11-23 14:14:24,336 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 14:14:24,345 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 14:14:24,362 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_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/sv-benchmarks/c/loop-new/count_by_2.i[891,904] [2021-11-23 14:14:24,365 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 14:14:24,379 INFO L208 MainTranslator]: Completed translation [2021-11-23 14:14:24,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:24 WrapperNode [2021-11-23 14:14:24,380 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 14:14:24,381 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 14:14:24,381 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 14:14:24,381 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 14:14:24,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:24" (1/1) ... [2021-11-23 14:14:24,394 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:24" (1/1) ... [2021-11-23 14:14:24,410 INFO L137 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 25 [2021-11-23 14:14:24,410 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 14:14:24,411 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 14:14:24,411 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 14:14:24,411 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 14:14:24,419 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:24" (1/1) ... [2021-11-23 14:14:24,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:24" (1/1) ... [2021-11-23 14:14:24,421 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:24" (1/1) ... [2021-11-23 14:14:24,421 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:24" (1/1) ... [2021-11-23 14:14:24,423 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:24" (1/1) ... [2021-11-23 14:14:24,427 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:24" (1/1) ... [2021-11-23 14:14:24,428 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:24" (1/1) ... [2021-11-23 14:14:24,429 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 14:14:24,430 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 14:14:24,430 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 14:14:24,430 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 14:14:24,431 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:24" (1/1) ... [2021-11-23 14:14:24,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 14:14:24,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:14:24,465 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 14:14:24,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 14:14:24,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 14:14:24,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 14:14:24,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 14:14:24,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 14:14:24,588 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 14:14:24,589 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 14:14:24,671 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 14:14:24,677 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 14:14:24,677 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 14:14:24,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:14:24 BoogieIcfgContainer [2021-11-23 14:14:24,679 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 14:14:24,681 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 14:14:24,681 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 14:14:24,685 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 14:14:24,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:14:24" (1/3) ... [2021-11-23 14:14:24,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@746d0af4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:14:24, skipping insertion in model container [2021-11-23 14:14:24,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:24" (2/3) ... [2021-11-23 14:14:24,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@746d0af4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:14:24, skipping insertion in model container [2021-11-23 14:14:24,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:14:24" (3/3) ... [2021-11-23 14:14:24,688 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_2.i [2021-11-23 14:14:24,693 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 14:14:24,694 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 14:14:24,745 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 14:14:24,753 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 [2021-11-23 14:14:24,754 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 14:14:24,768 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 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) [2021-11-23 14:14:24,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 14:14:24,773 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:14:24,774 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 14:14:24,775 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:14:24,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:14:24,781 INFO L85 PathProgramCache]: Analyzing trace with hash 889605037, now seen corresponding path program 1 times [2021-11-23 14:14:24,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:14:24,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159147531] [2021-11-23 14:14:24,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:14:24,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:14:24,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:14:24,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:14:24,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:14:24,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159147531] [2021-11-23 14:14:24,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159147531] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:14:24,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:14:24,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:14:24,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967760105] [2021-11-23 14:14:24,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:14:24,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:14:24,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:14:25,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:14:25,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:14:25,005 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 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) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:25,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:14:25,063 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2021-11-23 14:14:25,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:14:25,066 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 14:14:25,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:14:25,073 INFO L225 Difference]: With dead ends: 22 [2021-11-23 14:14:25,074 INFO L226 Difference]: Without dead ends: 10 [2021-11-23 14:14:25,076 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 [2021-11-23 14:14:25,093 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:14:25,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 17 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:14:25,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-23 14:14:25,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2021-11-23 14:14:25,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:25,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-11-23 14:14:25,167 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2021-11-23 14:14:25,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:14:25,168 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-11-23 14:14:25,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:25,169 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-11-23 14:14:25,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 14:14:25,169 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:14:25,169 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:14:25,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 14:14:25,170 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:14:25,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:14:25,174 INFO L85 PathProgramCache]: Analyzing trace with hash 265180975, now seen corresponding path program 1 times [2021-11-23 14:14:25,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:14:25,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451928046] [2021-11-23 14:14:25,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:14:25,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:14:25,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:14:25,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:14:25,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:14:25,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451928046] [2021-11-23 14:14:25,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451928046] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:14:25,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417975533] [2021-11-23 14:14:25,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:14:25,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:14:25,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:14:25,260 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:14:25,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 14:14:25,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:14:25,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 14:14:25,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:14:25,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:14:25,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:14:25,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:14:25,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417975533] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:14:25,441 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:14:25,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-23 14:14:25,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550223563] [2021-11-23 14:14:25,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:14:25,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 14:14:25,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:14:25,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 14:14:25,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 14:14:25,446 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:25,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:14:25,475 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-11-23 14:14:25,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 14:14:25,476 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-23 14:14:25,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:14:25,476 INFO L225 Difference]: With dead ends: 19 [2021-11-23 14:14:25,477 INFO L226 Difference]: Without dead ends: 15 [2021-11-23 14:14:25,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 14:14:25,479 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:14:25,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 15 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:14:25,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-23 14:14:25,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-23 14:14:25,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:25,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-11-23 14:14:25,485 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2021-11-23 14:14:25,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:14:25,485 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-11-23 14:14:25,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:25,486 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-11-23 14:14:25,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 14:14:25,487 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:14:25,487 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2021-11-23 14:14:25,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 14:14:25,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-23 14:14:25,706 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:14:25,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:14:25,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1745754443, now seen corresponding path program 2 times [2021-11-23 14:14:25,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:14:25,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979941521] [2021-11-23 14:14:25,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:14:25,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:14:25,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:14:25,782 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:14:25,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:14:25,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979941521] [2021-11-23 14:14:25,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979941521] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:14:25,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647215852] [2021-11-23 14:14:25,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 14:14:25,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:14:25,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:14:25,800 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:14:25,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 14:14:25,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 14:14:25,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:14:25,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 14:14:25,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:14:25,932 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:14:25,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:14:26,090 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:14:26,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647215852] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:14:26,090 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:14:26,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-11-23 14:14:26,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881061825] [2021-11-23 14:14:26,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:14:26,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 14:14:26,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:14:26,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 14:14:26,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-23 14:14:26,093 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:26,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:14:26,160 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2021-11-23 14:14:26,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 14:14:26,161 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 14:14:26,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:14:26,162 INFO L225 Difference]: With dead ends: 31 [2021-11-23 14:14:26,162 INFO L226 Difference]: Without dead ends: 27 [2021-11-23 14:14:26,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-23 14:14:26,165 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 10 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 14:14:26,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 15 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 14:14:26,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-23 14:14:26,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-23 14:14:26,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:26,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-11-23 14:14:26,183 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 14 [2021-11-23 14:14:26,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:14:26,183 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-11-23 14:14:26,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:26,185 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-11-23 14:14:26,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 14:14:26,187 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:14:26,187 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2021-11-23 14:14:26,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 14:14:26,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:14:26,404 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:14:26,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:14:26,404 INFO L85 PathProgramCache]: Analyzing trace with hash -95702975, now seen corresponding path program 3 times [2021-11-23 14:14:26,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:14:26,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214874553] [2021-11-23 14:14:26,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:14:26,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:14:26,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:14:26,575 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:14:26,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:14:26,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214874553] [2021-11-23 14:14:26,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214874553] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:14:26,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125765182] [2021-11-23 14:14:26,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 14:14:26,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:14:26,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:14:26,585 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:14:26,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 14:14:26,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-23 14:14:26,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:14:26,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 14:14:26,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:14:26,798 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:14:26,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:14:27,070 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:14:27,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125765182] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:14:27,071 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:14:27,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-11-23 14:14:27,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773802803] [2021-11-23 14:14:27,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:14:27,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 14:14:27,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:14:27,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 14:14:27,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-23 14:14:27,078 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:27,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:14:27,198 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2021-11-23 14:14:27,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 14:14:27,204 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 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 26 [2021-11-23 14:14:27,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:14:27,208 INFO L225 Difference]: With dead ends: 55 [2021-11-23 14:14:27,208 INFO L226 Difference]: Without dead ends: 51 [2021-11-23 14:14:27,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-23 14:14:27,215 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 14:14:27,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 18 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 14:14:27,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-23 14:14:27,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-11-23 14:14:27,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:27,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-11-23 14:14:27,226 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 26 [2021-11-23 14:14:27,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:14:27,227 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-11-23 14:14:27,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:27,237 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-11-23 14:14:27,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-23 14:14:27,238 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:14:27,239 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2021-11-23 14:14:27,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 14:14:27,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:14:27,468 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:14:27,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:14:27,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1293970777, now seen corresponding path program 4 times [2021-11-23 14:14:27,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:14:27,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172412581] [2021-11-23 14:14:27,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:14:27,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:14:27,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:14:27,856 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:14:27,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:14:27,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172412581] [2021-11-23 14:14:27,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172412581] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:14:27,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842321106] [2021-11-23 14:14:27,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 14:14:27,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:14:27,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:14:27,863 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:14:27,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 14:14:27,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 14:14:27,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:14:27,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 14:14:27,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:14:28,091 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:14:28,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:14:28,953 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:14:28,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842321106] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:14:28,954 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:14:28,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2021-11-23 14:14:28,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307423273] [2021-11-23 14:14:28,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:14:28,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-23 14:14:28,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:14:28,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-23 14:14:28,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-23 14:14:28,958 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:29,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:14:29,145 INFO L93 Difference]: Finished difference Result 103 states and 126 transitions. [2021-11-23 14:14:29,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-23 14:14:29,146 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 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 50 [2021-11-23 14:14:29,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:14:29,148 INFO L225 Difference]: With dead ends: 103 [2021-11-23 14:14:29,148 INFO L226 Difference]: Without dead ends: 99 [2021-11-23 14:14:29,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-23 14:14:29,150 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 46 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 14:14:29,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 18 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 14:14:29,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-23 14:14:29,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-11-23 14:14:29,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:29,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2021-11-23 14:14:29,163 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 50 [2021-11-23 14:14:29,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:14:29,164 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2021-11-23 14:14:29,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:29,164 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2021-11-23 14:14:29,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-23 14:14:29,168 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:14:29,168 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1] [2021-11-23 14:14:29,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 14:14:29,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:14:29,385 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:14:29,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:14:29,386 INFO L85 PathProgramCache]: Analyzing trace with hash -675115127, now seen corresponding path program 5 times [2021-11-23 14:14:29,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:14:29,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88850046] [2021-11-23 14:14:29,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:14:29,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:14:29,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:14:30,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:14:30,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:14:30,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88850046] [2021-11-23 14:14:30,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88850046] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:14:30,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220892971] [2021-11-23 14:14:30,525 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 14:14:30,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:14:30,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:14:30,526 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:14:30,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 14:14:30,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2021-11-23 14:14:30,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:14:30,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-23 14:14:30,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:14:30,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:14:30,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:14:33,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:14:33,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220892971] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:14:33,643 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:14:33,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2021-11-23 14:14:33,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583670955] [2021-11-23 14:14:33,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:14:33,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-11-23 14:14:33,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:14:33,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-11-23 14:14:33,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-11-23 14:14:33,652 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 97 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:34,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:14:34,011 INFO L93 Difference]: Finished difference Result 199 states and 246 transitions. [2021-11-23 14:14:34,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-23 14:14:34,012 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 97 states have internal predecessors, (195), 0 states have call successors, (0), 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 98 [2021-11-23 14:14:34,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:14:34,024 INFO L225 Difference]: With dead ends: 199 [2021-11-23 14:14:34,024 INFO L226 Difference]: Without dead ends: 195 [2021-11-23 14:14:34,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-11-23 14:14:34,032 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 141 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 14:14:34,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 18 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 14:14:34,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-11-23 14:14:34,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2021-11-23 14:14:34,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.0051546391752577) internal successors, (195), 194 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:34,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2021-11-23 14:14:34,066 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 98 [2021-11-23 14:14:34,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:14:34,066 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2021-11-23 14:14:34,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 97 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:34,067 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2021-11-23 14:14:34,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-23 14:14:34,081 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:14:34,081 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1] [2021-11-23 14:14:34,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 14:14:34,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:14:34,282 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:14:34,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:14:34,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1064733719, now seen corresponding path program 6 times [2021-11-23 14:14:34,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:14:34,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744272964] [2021-11-23 14:14:34,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:14:34,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:14:34,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:14:37,727 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:14:37,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:14:37,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744272964] [2021-11-23 14:14:37,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744272964] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:14:37,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571926690] [2021-11-23 14:14:37,728 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 14:14:37,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:14:37,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:14:37,750 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:14:37,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 14:14:37,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2021-11-23 14:14:37,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:14:37,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-23 14:14:37,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:14:38,330 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:14:38,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:14:47,326 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:14:47,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571926690] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:14:47,326 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:14:47,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2021-11-23 14:14:47,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134755164] [2021-11-23 14:14:47,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:14:47,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2021-11-23 14:14:47,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:14:47,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2021-11-23 14:14:47,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2021-11-23 14:14:47,341 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand has 193 states, 193 states have (on average 2.005181347150259) internal successors, (387), 193 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:48,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:14:48,245 INFO L93 Difference]: Finished difference Result 391 states and 486 transitions. [2021-11-23 14:14:48,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-11-23 14:14:48,246 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 2.005181347150259) internal successors, (387), 193 states have internal predecessors, (387), 0 states have call successors, (0), 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 194 [2021-11-23 14:14:48,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:14:48,250 INFO L225 Difference]: With dead ends: 391 [2021-11-23 14:14:48,251 INFO L226 Difference]: Without dead ends: 387 [2021-11-23 14:14:48,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2021-11-23 14:14:48,254 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 285 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 14:14:48,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 18 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 14:14:48,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-11-23 14:14:48,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 387. [2021-11-23 14:14:48,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.0025906735751295) internal successors, (387), 386 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:48,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 387 transitions. [2021-11-23 14:14:48,283 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 387 transitions. Word has length 194 [2021-11-23 14:14:48,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:14:48,284 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 387 transitions. [2021-11-23 14:14:48,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 2.005181347150259) internal successors, (387), 193 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:48,285 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 387 transitions. [2021-11-23 14:14:48,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2021-11-23 14:14:48,292 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:14:48,293 INFO L514 BasicCegarLoop]: trace histogram [190, 190, 1, 1, 1, 1, 1, 1] [2021-11-23 14:14:48,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 14:14:48,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:14:48,520 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:14:48,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:14:48,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1658733399, now seen corresponding path program 7 times [2021-11-23 14:14:48,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:14:48,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234434037] [2021-11-23 14:14:48,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:14:48,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:14:48,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:00,787 INFO L134 CoverageAnalysis]: Checked inductivity of 36100 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:15:00,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:15:00,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234434037] [2021-11-23 14:15:00,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234434037] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:15:00,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185341577] [2021-11-23 14:15:00,789 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 14:15:00,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:15:00,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:15:00,791 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:15:00,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 14:15:00,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:00,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 192 conjunts are in the unsatisfiable core [2021-11-23 14:15:00,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:15:01,763 INFO L134 CoverageAnalysis]: Checked inductivity of 36100 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:15:01,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:15:36,874 INFO L134 CoverageAnalysis]: Checked inductivity of 36100 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:15:36,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185341577] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:15:36,875 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:15:36,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 193, 193] total 385 [2021-11-23 14:15:36,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087385095] [2021-11-23 14:15:36,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:15:36,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2021-11-23 14:15:36,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:15:36,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2021-11-23 14:15:36,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73920, Invalid=73920, Unknown=0, NotChecked=0, Total=147840 [2021-11-23 14:15:36,937 INFO L87 Difference]: Start difference. First operand 387 states and 387 transitions. Second operand has 385 states, 385 states have (on average 2.0025974025974027) internal successors, (771), 385 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:15:40,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:15:40,455 INFO L93 Difference]: Finished difference Result 775 states and 966 transitions. [2021-11-23 14:15:40,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2021-11-23 14:15:40,456 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 2.0025974025974027) internal successors, (771), 385 states have internal predecessors, (771), 0 states have call successors, (0), 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 [2021-11-23 14:15:40,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:15:40,461 INFO L225 Difference]: With dead ends: 775 [2021-11-23 14:15:40,461 INFO L226 Difference]: Without dead ends: 771 [2021-11-23 14:15:40,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 963 GetRequests, 580 SyntacticMatches, 0 SemanticMatches, 383 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 45.8s TimeCoverageRelationStatistics Valid=73920, Invalid=73920, Unknown=0, NotChecked=0, Total=147840 [2021-11-23 14:15:40,472 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 573 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 14:15:40,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [573 Valid, 24 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 14:15:40,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-11-23 14:15:40,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 771. [2021-11-23 14:15:40,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 770 states have (on average 1.0012987012987014) internal successors, (771), 770 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:15:40,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 771 transitions. [2021-11-23 14:15:40,508 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 771 transitions. Word has length 386 [2021-11-23 14:15:40,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:15:40,509 INFO L470 AbstractCegarLoop]: Abstraction has 771 states and 771 transitions. [2021-11-23 14:15:40,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 2.0025974025974027) internal successors, (771), 385 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:15:40,510 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 771 transitions. [2021-11-23 14:15:40,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 771 [2021-11-23 14:15:40,545 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:15:40,546 INFO L514 BasicCegarLoop]: trace histogram [382, 382, 1, 1, 1, 1, 1, 1] [2021-11-23 14:15:40,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 14:15:40,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-23 14:15:40,772 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:15:40,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:15:40,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1786531369, now seen corresponding path program 8 times [2021-11-23 14:15:40,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:15:40,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252656813] [2021-11-23 14:15:40,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:15:40,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:15:41,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:16:27,519 INFO L134 CoverageAnalysis]: Checked inductivity of 145924 backedges. 0 proven. 145924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:16:27,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:16:27,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252656813] [2021-11-23 14:16:27,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252656813] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:16:27,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708001534] [2021-11-23 14:16:27,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 14:16:27,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:16:27,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:16:27,521 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:16:27,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 14:16:27,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 14:16:27,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:16:27,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 1177 conjuncts, 384 conjunts are in the unsatisfiable core [2021-11-23 14:16:27,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:16:29,327 INFO L134 CoverageAnalysis]: Checked inductivity of 145924 backedges. 0 proven. 145924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:16:29,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:18:50,293 INFO L134 CoverageAnalysis]: Checked inductivity of 145924 backedges. 0 proven. 145924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:18:50,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708001534] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:18:50,293 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:18:50,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [385, 385, 385] total 769 [2021-11-23 14:18:50,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249884649] [2021-11-23 14:18:50,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:18:50,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 769 states [2021-11-23 14:18:50,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:18:50,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 769 interpolants. [2021-11-23 14:18:50,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295296, Invalid=295296, Unknown=0, NotChecked=0, Total=590592 [2021-11-23 14:18:50,407 INFO L87 Difference]: Start difference. First operand 771 states and 771 transitions. Second operand has 769 states, 769 states have (on average 2.001300390117035) internal successors, (1539), 769 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:19:11,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:19:11,764 INFO L93 Difference]: Finished difference Result 1543 states and 1926 transitions. [2021-11-23 14:19:11,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 768 states. [2021-11-23 14:19:11,766 INFO L78 Accepts]: Start accepts. Automaton has has 769 states, 769 states have (on average 2.001300390117035) internal successors, (1539), 769 states have internal predecessors, (1539), 0 states have call successors, (0), 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 770 [2021-11-23 14:19:11,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:19:11,776 INFO L225 Difference]: With dead ends: 1543 [2021-11-23 14:19:11,777 INFO L226 Difference]: Without dead ends: 1539 [2021-11-23 14:19:11,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1923 GetRequests, 1156 SyntacticMatches, 0 SemanticMatches, 767 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 184.7s TimeCoverageRelationStatistics Valid=295296, Invalid=295296, Unknown=0, NotChecked=0, Total=590592 [2021-11-23 14:19:11,821 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 1149 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1551 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1149 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 1551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-23 14:19:11,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1149 Valid, 33 Invalid, 1945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 1551 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-23 14:19:11,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1539 states. [2021-11-23 14:19:11,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1539 to 1539. [2021-11-23 14:19:11,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1539 states, 1538 states have (on average 1.0006501950585176) internal successors, (1539), 1538 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:19:11,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 1539 transitions. [2021-11-23 14:19:11,871 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 1539 transitions. Word has length 770 [2021-11-23 14:19:11,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:19:11,872 INFO L470 AbstractCegarLoop]: Abstraction has 1539 states and 1539 transitions. [2021-11-23 14:19:11,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 769 states, 769 states have (on average 2.001300390117035) internal successors, (1539), 769 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:19:11,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 1539 transitions. [2021-11-23 14:19:11,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1539 [2021-11-23 14:19:11,891 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:19:11,892 INFO L514 BasicCegarLoop]: trace histogram [766, 766, 1, 1, 1, 1, 1, 1] [2021-11-23 14:19:11,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 14:19:12,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:19:12,093 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:19:12,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:19:12,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1780911831, now seen corresponding path program 9 times [2021-11-23 14:19:12,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:19:12,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44973321] [2021-11-23 14:19:12,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:19:12,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:19:14,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:22:22,761 INFO L134 CoverageAnalysis]: Checked inductivity of 586756 backedges. 0 proven. 586756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:22:22,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:22:22,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44973321] [2021-11-23 14:22:22,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44973321] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:22:22,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487323113] [2021-11-23 14:22:22,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 14:22:22,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:22:22,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:22:22,763 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:22:22,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5cdf11-5ebc-4106-8f2a-05794ae2646c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 14:22:30,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 767 check-sat command(s) [2021-11-23 14:22:30,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:22:30,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 2329 conjuncts, 768 conjunts are in the unsatisfiable core [2021-11-23 14:22:30,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:22:34,215 INFO L134 CoverageAnalysis]: Checked inductivity of 586756 backedges. 0 proven. 586756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:22:34,216 INFO L328 TraceCheckSpWp]: Computing backward predicates...