./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 776d32abf1ae3b62e7ad4a02cd7c02c0cc6433852a1fe73b7d30c6e216da832a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:10:37,638 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:10:37,640 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:10:37,671 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:10:37,671 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:10:37,673 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:10:37,675 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:10:37,677 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:10:37,678 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:10:37,680 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:10:37,681 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:10:37,682 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:10:37,683 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:10:37,684 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:10:37,686 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:10:37,687 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:10:37,688 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:10:37,690 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:10:37,692 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:10:37,694 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:10:37,696 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:10:37,698 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:10:37,699 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:10:37,700 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:10:37,704 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:10:37,705 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:10:37,705 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:10:37,706 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:10:37,707 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:10:37,708 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:10:37,709 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:10:37,710 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:10:37,711 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:10:37,712 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:10:37,713 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:10:37,713 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:10:37,714 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:10:37,715 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:10:37,715 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:10:37,716 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:10:37,717 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:10:37,718 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:10:37,745 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:10:37,745 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:10:37,745 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:10:37,746 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:10:37,746 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:10:37,746 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:10:37,747 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:10:37,747 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:10:37,747 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:10:37,748 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:10:37,748 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:10:37,748 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:10:37,748 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:10:37,749 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:10:37,749 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:10:37,749 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:10:37,749 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:10:37,749 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:10:37,750 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:10:37,750 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:10:37,750 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:10:37,750 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:10:37,750 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:10:37,751 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:10:37,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:10:37,751 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:10:37,751 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:10:37,752 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:10:37,752 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:10:37,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:10:37,752 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:10:37,752 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:10:37,752 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:10:37,753 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:10:37,753 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_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 776d32abf1ae3b62e7ad4a02cd7c02c0cc6433852a1fe73b7d30c6e216da832a [2021-11-20 06:10:38,010 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:10:38,043 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:10:38,047 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:10:38,048 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:10:38,049 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:10:38,051 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c [2021-11-20 06:10:38,138 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/data/16468635e/963d5b58a05e464bbbcc4c71ecf33caf/FLAG7040d8469 [2021-11-20 06:10:38,663 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:10:38,667 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c [2021-11-20 06:10:38,678 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/data/16468635e/963d5b58a05e464bbbcc4c71ecf33caf/FLAG7040d8469 [2021-11-20 06:10:39,024 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/data/16468635e/963d5b58a05e464bbbcc4c71ecf33caf [2021-11-20 06:10:39,028 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:10:39,032 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:10:39,034 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:10:39,035 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:10:39,039 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:10:39,040 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:10:39" (1/1) ... [2021-11-20 06:10:39,041 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@431f763c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:10:39, skipping insertion in model container [2021-11-20 06:10:39,041 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:10:39" (1/1) ... [2021-11-20 06:10:39,049 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:10:39,071 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:10:39,333 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_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c[490,503] [2021-11-20 06:10:39,352 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:10:39,360 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:10:39,381 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_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c[490,503] [2021-11-20 06:10:39,409 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:10:39,436 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:10:39,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:10:39 WrapperNode [2021-11-20 06:10:39,437 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:10:39,438 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:10:39,438 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:10:39,439 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:10:39,449 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:10:39" (1/1) ... [2021-11-20 06:10:39,457 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:10:39" (1/1) ... [2021-11-20 06:10:39,494 INFO L137 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 80 [2021-11-20 06:10:39,495 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:10:39,496 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:10:39,496 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:10:39,496 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:10:39,507 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:10:39" (1/1) ... [2021-11-20 06:10:39,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:10:39" (1/1) ... [2021-11-20 06:10:39,524 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:10:39" (1/1) ... [2021-11-20 06:10:39,524 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:10:39" (1/1) ... [2021-11-20 06:10:39,533 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:10:39" (1/1) ... [2021-11-20 06:10:39,537 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:10:39" (1/1) ... [2021-11-20 06:10:39,551 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:10:39" (1/1) ... [2021-11-20 06:10:39,554 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:10:39,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:10:39,555 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:10:39,555 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:10:39,556 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:10:39" (1/1) ... [2021-11-20 06:10:39,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:10:39,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:10:39,597 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:10:39,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:10:39,649 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:10:39,649 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 06:10:39,649 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 06:10:39,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:10:39,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:10:39,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:10:39,650 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 06:10:39,650 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 06:10:39,727 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:10:39,730 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:10:39,966 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:10:39,985 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:10:39,985 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-20 06:10:39,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:10:39 BoogieIcfgContainer [2021-11-20 06:10:40,002 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:10:40,005 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:10:40,005 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:10:40,009 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:10:40,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:10:39" (1/3) ... [2021-11-20 06:10:40,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50f1e146 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:10:40, skipping insertion in model container [2021-11-20 06:10:40,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:10:39" (2/3) ... [2021-11-20 06:10:40,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50f1e146 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:10:40, skipping insertion in model container [2021-11-20 06:10:40,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:10:39" (3/3) ... [2021-11-20 06:10:40,012 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound10.c [2021-11-20 06:10:40,018 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:10:40,018 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:10:40,069 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:10:40,077 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 06:10:40,078 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:10:40,115 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 06:10:40,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-20 06:10:40,123 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:40,124 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:10:40,125 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:40,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:40,134 INFO L85 PathProgramCache]: Analyzing trace with hash 872320404, now seen corresponding path program 1 times [2021-11-20 06:10:40,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:40,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350689932] [2021-11-20 06:10:40,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:40,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:40,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:40,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:10:40,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:40,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:10:40,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:40,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:10:40,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:40,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:10:40,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:40,457 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 06:10:40,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:40,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350689932] [2021-11-20 06:10:40,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350689932] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:40,462 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:40,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:10:40,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661644563] [2021-11-20 06:10:40,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:40,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:10:40,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:40,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:10:40,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:10:40,523 INFO L87 Difference]: Start difference. First operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:10:40,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:40,565 INFO L93 Difference]: Finished difference Result 67 states and 109 transitions. [2021-11-20 06:10:40,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:10:40,567 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-11-20 06:10:40,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:40,575 INFO L225 Difference]: With dead ends: 67 [2021-11-20 06:10:40,575 INFO L226 Difference]: Without dead ends: 31 [2021-11-20 06:10:40,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:10:40,587 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:40,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:10:40,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-20 06:10:40,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-20 06:10:40,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 06:10:40,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2021-11-20 06:10:40,651 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 29 [2021-11-20 06:10:40,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:40,652 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2021-11-20 06:10:40,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:10:40,653 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2021-11-20 06:10:40,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-20 06:10:40,656 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:40,656 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:10:40,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:10:40,657 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:40,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:40,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1714405113, now seen corresponding path program 1 times [2021-11-20 06:10:40,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:40,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549698151] [2021-11-20 06:10:40,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:40,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:40,698 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:10:40,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2087694981] [2021-11-20 06:10:40,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:40,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:10:40,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:10:40,702 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:10:40,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:10:40,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:40,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:10:40,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:10:41,076 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 06:10:41,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:10:41,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:41,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549698151] [2021-11-20 06:10:41,078 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:10:41,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087694981] [2021-11-20 06:10:41,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087694981] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:41,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:41,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:10:41,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644393468] [2021-11-20 06:10:41,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:41,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:10:41,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:41,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:10:41,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:10:41,088 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 06:10:41,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:41,259 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2021-11-20 06:10:41,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:10:41,260 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2021-11-20 06:10:41,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:41,261 INFO L225 Difference]: With dead ends: 50 [2021-11-20 06:10:41,261 INFO L226 Difference]: Without dead ends: 43 [2021-11-20 06:10:41,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:10:41,263 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 31 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:41,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 135 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:10:41,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-20 06:10:41,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2021-11-20 06:10:41,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 06:10:41,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2021-11-20 06:10:41,289 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 30 [2021-11-20 06:10:41,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:41,290 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2021-11-20 06:10:41,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 06:10:41,290 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2021-11-20 06:10:41,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-20 06:10:41,292 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:41,292 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:10:41,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:10:41,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:10:41,493 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:41,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:41,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1825736765, now seen corresponding path program 1 times [2021-11-20 06:10:41,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:41,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735435012] [2021-11-20 06:10:41,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:41,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:41,516 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:10:41,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [39035715] [2021-11-20 06:10:41,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:41,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:10:41,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:10:41,518 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:10:41,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:10:41,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:41,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:10:41,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:10:41,755 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 06:10:41,755 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:10:41,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:41,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735435012] [2021-11-20 06:10:41,756 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:10:41,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39035715] [2021-11-20 06:10:41,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39035715] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:41,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:41,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:10:41,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911113145] [2021-11-20 06:10:41,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:41,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:10:41,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:41,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:10:41,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:10:41,760 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 06:10:41,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:41,818 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2021-11-20 06:10:41,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:10:41,819 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2021-11-20 06:10:41,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:41,820 INFO L225 Difference]: With dead ends: 49 [2021-11-20 06:10:41,821 INFO L226 Difference]: Without dead ends: 47 [2021-11-20 06:10:41,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:10:41,823 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 9 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:41,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 146 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:10:41,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-20 06:10:41,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-11-20 06:10:41,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-20 06:10:41,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2021-11-20 06:10:41,847 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 33 [2021-11-20 06:10:41,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:41,848 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2021-11-20 06:10:41,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 06:10:41,848 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2021-11-20 06:10:41,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 06:10:41,850 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:41,850 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:10:41,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:10:42,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:10:42,079 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:42,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:42,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1547103247, now seen corresponding path program 1 times [2021-11-20 06:10:42,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:42,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829089295] [2021-11-20 06:10:42,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:42,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:42,108 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:10:42,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1008853465] [2021-11-20 06:10:42,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:42,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:10:42,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:10:42,110 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:10:42,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:10:42,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:42,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:10:42,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:10:42,338 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 06:10:42,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:10:42,539 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 06:10:42,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:42,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829089295] [2021-11-20 06:10:42,541 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:10:42,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008853465] [2021-11-20 06:10:42,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008853465] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:10:42,541 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:10:42,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-11-20 06:10:42,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499268466] [2021-11-20 06:10:42,543 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:10:42,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:10:42,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:42,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:10:42,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:10:42,546 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:10:42,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:42,753 INFO L93 Difference]: Finished difference Result 99 states and 139 transitions. [2021-11-20 06:10:42,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:10:42,754 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2021-11-20 06:10:42,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:42,761 INFO L225 Difference]: With dead ends: 99 [2021-11-20 06:10:42,761 INFO L226 Difference]: Without dead ends: 92 [2021-11-20 06:10:42,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:10:42,763 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 60 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:42,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 224 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:10:42,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-20 06:10:42,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 67. [2021-11-20 06:10:42,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 06:10:42,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 91 transitions. [2021-11-20 06:10:42,805 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 91 transitions. Word has length 35 [2021-11-20 06:10:42,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:42,806 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 91 transitions. [2021-11-20 06:10:42,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:10:42,806 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 91 transitions. [2021-11-20 06:10:42,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-20 06:10:42,807 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:42,808 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:10:42,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:10:43,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:10:43,023 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:43,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:43,023 INFO L85 PathProgramCache]: Analyzing trace with hash -720434099, now seen corresponding path program 1 times [2021-11-20 06:10:43,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:43,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221427093] [2021-11-20 06:10:43,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:43,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:43,049 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:10:43,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1688732676] [2021-11-20 06:10:43,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:43,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:10:43,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:10:43,067 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:10:43,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:10:43,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:43,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:10:43,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:10:43,306 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 06:10:43,307 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:10:43,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:43,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221427093] [2021-11-20 06:10:43,307 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:10:43,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688732676] [2021-11-20 06:10:43,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688732676] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:43,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:43,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:10:43,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982689121] [2021-11-20 06:10:43,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:43,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:10:43,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:43,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:10:43,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:10:43,311 INFO L87 Difference]: Start difference. First operand 67 states and 91 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:10:43,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:43,382 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2021-11-20 06:10:43,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:10:43,383 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2021-11-20 06:10:43,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:43,390 INFO L225 Difference]: With dead ends: 75 [2021-11-20 06:10:43,390 INFO L226 Difference]: Without dead ends: 73 [2021-11-20 06:10:43,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:10:43,399 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 9 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:43,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 142 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:10:43,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-20 06:10:43,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2021-11-20 06:10:43,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 50 states have internal predecessors, (61), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 06:10:43,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2021-11-20 06:10:43,433 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 38 [2021-11-20 06:10:43,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:43,435 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2021-11-20 06:10:43,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:10:43,436 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2021-11-20 06:10:43,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-20 06:10:43,445 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:43,446 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:10:43,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:10:43,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:10:43,647 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:43,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:43,647 INFO L85 PathProgramCache]: Analyzing trace with hash -376152117, now seen corresponding path program 1 times [2021-11-20 06:10:43,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:43,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840645042] [2021-11-20 06:10:43,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:43,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:43,671 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:10:43,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1282277330] [2021-11-20 06:10:43,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:43,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:10:43,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:10:43,677 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:10:43,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:10:43,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:43,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 06:10:43,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:10:43,942 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 06:10:43,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:10:44,187 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 06:10:44,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:44,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840645042] [2021-11-20 06:10:44,188 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:10:44,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282277330] [2021-11-20 06:10:44,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282277330] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:10:44,188 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:10:44,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-20 06:10:44,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161996203] [2021-11-20 06:10:44,189 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:10:44,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:10:44,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:44,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:10:44,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:10:44,190 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 06:10:44,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:44,257 INFO L93 Difference]: Finished difference Result 95 states and 125 transitions. [2021-11-20 06:10:44,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:10:44,257 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2021-11-20 06:10:44,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:44,260 INFO L225 Difference]: With dead ends: 95 [2021-11-20 06:10:44,261 INFO L226 Difference]: Without dead ends: 93 [2021-11-20 06:10:44,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:10:44,262 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 13 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:44,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 262 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 31 Unchecked, 0.0s Time] [2021-11-20 06:10:44,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-20 06:10:44,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2021-11-20 06:10:44,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 62 states have (on average 1.2419354838709677) internal successors, (77), 63 states have internal predecessors, (77), 21 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-20 06:10:44,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 118 transitions. [2021-11-20 06:10:44,283 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 118 transitions. Word has length 38 [2021-11-20 06:10:44,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:44,283 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 118 transitions. [2021-11-20 06:10:44,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 06:10:44,284 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 118 transitions. [2021-11-20 06:10:44,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 06:10:44,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:44,285 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:10:44,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:10:44,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-20 06:10:44,511 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:44,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:44,511 INFO L85 PathProgramCache]: Analyzing trace with hash 279172547, now seen corresponding path program 1 times [2021-11-20 06:10:44,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:44,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647442686] [2021-11-20 06:10:44,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:44,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:44,529 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:10:44,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [638294098] [2021-11-20 06:10:44,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:44,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:10:44,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:10:44,547 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:10:44,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:10:44,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:44,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:10:44,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:10:44,748 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 06:10:44,748 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:10:44,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:44,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647442686] [2021-11-20 06:10:44,748 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:10:44,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638294098] [2021-11-20 06:10:44,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638294098] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:44,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:44,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:10:44,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864179785] [2021-11-20 06:10:44,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:44,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:10:44,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:44,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:10:44,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:10:44,751 INFO L87 Difference]: Start difference. First operand 89 states and 118 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 06:10:44,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:44,805 INFO L93 Difference]: Finished difference Result 126 states and 175 transitions. [2021-11-20 06:10:44,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:10:44,806 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2021-11-20 06:10:44,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:44,808 INFO L225 Difference]: With dead ends: 126 [2021-11-20 06:10:44,808 INFO L226 Difference]: Without dead ends: 124 [2021-11-20 06:10:44,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:10:44,810 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 8 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:44,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 135 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:10:44,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-20 06:10:44,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 119. [2021-11-20 06:10:44,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 75 states have (on average 1.2666666666666666) internal successors, (95), 76 states have internal predecessors, (95), 37 states have call successors, (37), 6 states have call predecessors, (37), 6 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-11-20 06:10:44,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 168 transitions. [2021-11-20 06:10:44,859 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 168 transitions. Word has length 43 [2021-11-20 06:10:44,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:44,862 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 168 transitions. [2021-11-20 06:10:44,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 06:10:44,863 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 168 transitions. [2021-11-20 06:10:44,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 06:10:44,868 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:44,869 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:10:44,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:10:45,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:10:45,083 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:45,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:45,083 INFO L85 PathProgramCache]: Analyzing trace with hash -2141198011, now seen corresponding path program 1 times [2021-11-20 06:10:45,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:45,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882654667] [2021-11-20 06:10:45,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:45,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:45,098 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:10:45,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [437235626] [2021-11-20 06:10:45,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:45,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:10:45,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:10:45,100 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:10:45,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 06:10:45,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:45,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-20 06:10:45,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:10:45,440 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 06:10:45,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:10:45,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:45,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882654667] [2021-11-20 06:10:45,507 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:10:45,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437235626] [2021-11-20 06:10:45,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437235626] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:10:45,508 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:10:45,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-20 06:10:45,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686062919] [2021-11-20 06:10:45,509 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:10:45,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:10:45,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:45,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:10:45,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:10:45,510 INFO L87 Difference]: Start difference. First operand 119 states and 168 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:10:45,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:45,664 INFO L93 Difference]: Finished difference Result 133 states and 180 transitions. [2021-11-20 06:10:45,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:10:45,665 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2021-11-20 06:10:45,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:45,669 INFO L225 Difference]: With dead ends: 133 [2021-11-20 06:10:45,669 INFO L226 Difference]: Without dead ends: 131 [2021-11-20 06:10:45,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:10:45,671 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 27 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:45,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 242 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:10:45,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-20 06:10:45,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2021-11-20 06:10:45,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 81 states have (on average 1.2469135802469136) internal successors, (101), 82 states have internal predecessors, (101), 37 states have call successors, (37), 8 states have call predecessors, (37), 8 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-11-20 06:10:45,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 174 transitions. [2021-11-20 06:10:45,713 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 174 transitions. Word has length 43 [2021-11-20 06:10:45,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:45,713 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 174 transitions. [2021-11-20 06:10:45,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:10:45,714 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 174 transitions. [2021-11-20 06:10:45,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 06:10:45,717 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:45,717 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:10:45,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:10:45,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:10:45,939 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:45,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:45,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1796916029, now seen corresponding path program 2 times [2021-11-20 06:10:45,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:45,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650962395] [2021-11-20 06:10:45,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:45,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:45,956 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:10:45,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [451442630] [2021-11-20 06:10:45,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:10:45,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:10:45,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:10:45,964 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:10:45,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 06:10:46,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:10:46,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:10:46,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:10:46,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:10:46,111 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 06:10:46,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:10:46,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:46,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650962395] [2021-11-20 06:10:46,112 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:10:46,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451442630] [2021-11-20 06:10:46,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451442630] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:46,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:46,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:10:46,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863836243] [2021-11-20 06:10:46,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:46,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:10:46,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:46,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:10:46,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:10:46,115 INFO L87 Difference]: Start difference. First operand 127 states and 174 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 06:10:46,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:46,222 INFO L93 Difference]: Finished difference Result 166 states and 226 transitions. [2021-11-20 06:10:46,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:10:46,222 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2021-11-20 06:10:46,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:46,224 INFO L225 Difference]: With dead ends: 166 [2021-11-20 06:10:46,224 INFO L226 Difference]: Without dead ends: 110 [2021-11-20 06:10:46,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:10:46,227 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 18 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:46,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 164 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:10:46,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-20 06:10:46,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 102. [2021-11-20 06:10:46,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 64 states have (on average 1.1875) internal successors, (76), 65 states have internal predecessors, (76), 29 states have call successors, (29), 8 states have call predecessors, (29), 8 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-11-20 06:10:46,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 133 transitions. [2021-11-20 06:10:46,244 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 133 transitions. Word has length 43 [2021-11-20 06:10:46,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:46,245 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 133 transitions. [2021-11-20 06:10:46,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 06:10:46,245 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 133 transitions. [2021-11-20 06:10:46,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-20 06:10:46,246 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:46,247 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:10:46,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 06:10:46,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-20 06:10:46,467 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:46,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:46,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1189241395, now seen corresponding path program 1 times [2021-11-20 06:10:46,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:46,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515000626] [2021-11-20 06:10:46,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:46,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:46,479 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:10:46,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1368988387] [2021-11-20 06:10:46,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:46,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:10:46,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:10:46,481 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:10:46,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 06:10:46,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:46,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:10:46,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:10:46,650 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 06:10:46,650 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:10:46,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:46,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515000626] [2021-11-20 06:10:46,651 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:10:46,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368988387] [2021-11-20 06:10:46,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368988387] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:46,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:46,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:10:46,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428974625] [2021-11-20 06:10:46,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:46,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:10:46,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:46,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:10:46,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:10:46,653 INFO L87 Difference]: Start difference. First operand 102 states and 133 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 06:10:46,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:46,733 INFO L93 Difference]: Finished difference Result 154 states and 217 transitions. [2021-11-20 06:10:46,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:10:46,733 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2021-11-20 06:10:46,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:46,736 INFO L225 Difference]: With dead ends: 154 [2021-11-20 06:10:46,736 INFO L226 Difference]: Without dead ends: 152 [2021-11-20 06:10:46,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:10:46,738 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 9 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:46,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 146 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:10:46,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-20 06:10:46,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 136. [2021-11-20 06:10:46,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 73 states have (on average 1.1643835616438356) internal successors, (85), 80 states have internal predecessors, (85), 53 states have call successors, (53), 9 states have call predecessors, (53), 9 states have return successors, (52), 46 states have call predecessors, (52), 52 states have call successors, (52) [2021-11-20 06:10:46,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 190 transitions. [2021-11-20 06:10:46,766 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 190 transitions. Word has length 48 [2021-11-20 06:10:46,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:46,766 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 190 transitions. [2021-11-20 06:10:46,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 06:10:46,767 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 190 transitions. [2021-11-20 06:10:46,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-20 06:10:46,768 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:46,769 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:10:46,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 06:10:46,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:10:46,983 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:46,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:46,983 INFO L85 PathProgramCache]: Analyzing trace with hash -828341661, now seen corresponding path program 1 times [2021-11-20 06:10:46,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:46,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874672160] [2021-11-20 06:10:46,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:46,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:46,995 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:10:46,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [251023790] [2021-11-20 06:10:46,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:46,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:10:46,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:10:46,997 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:10:47,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 06:10:47,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:47,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-20 06:10:47,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:10:47,955 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 06:10:47,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:10:49,602 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 06:10:49,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:49,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874672160] [2021-11-20 06:10:49,603 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:10:49,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251023790] [2021-11-20 06:10:49,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251023790] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:10:49,603 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:10:49,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 23 [2021-11-20 06:10:49,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59409541] [2021-11-20 06:10:49,604 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:10:49,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 06:10:49,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:49,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 06:10:49,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-11-20 06:10:49,606 INFO L87 Difference]: Start difference. First operand 136 states and 190 transitions. Second operand has 23 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-20 06:11:02,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:11:02,945 INFO L93 Difference]: Finished difference Result 310 states and 449 transitions. [2021-11-20 06:11:02,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-20 06:11:02,946 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 60 [2021-11-20 06:11:02,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:11:02,950 INFO L225 Difference]: With dead ends: 310 [2021-11-20 06:11:02,950 INFO L226 Difference]: Without dead ends: 241 [2021-11-20 06:11:02,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=548, Invalid=2208, Unknown=0, NotChecked=0, Total=2756 [2021-11-20 06:11:02,954 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 127 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 1044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:11:02,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 392 Invalid, 1044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-11-20 06:11:02,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-11-20 06:11:03,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 199. [2021-11-20 06:11:03,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 114 states have (on average 1.1754385964912282) internal successors, (134), 121 states have internal predecessors, (134), 73 states have call successors, (73), 11 states have call predecessors, (73), 11 states have return successors, (72), 66 states have call predecessors, (72), 72 states have call successors, (72) [2021-11-20 06:11:03,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 279 transitions. [2021-11-20 06:11:03,015 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 279 transitions. Word has length 60 [2021-11-20 06:11:03,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:11:03,015 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 279 transitions. [2021-11-20 06:11:03,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-20 06:11:03,016 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 279 transitions. [2021-11-20 06:11:03,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-20 06:11:03,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:11:03,018 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:11:03,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 06:11:03,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 06:11:03,243 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:11:03,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:03,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1607561902, now seen corresponding path program 1 times [2021-11-20 06:11:03,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:03,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156618853] [2021-11-20 06:11:03,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:03,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:03,258 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:11:03,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [724013667] [2021-11-20 06:11:03,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:03,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:11:03,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:11:03,260 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:11:03,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 06:11:03,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:03,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 06:11:03,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:11:03,571 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-20 06:11:03,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:11:03,802 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-20 06:11:03,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:03,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156618853] [2021-11-20 06:11:03,803 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:11:03,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724013667] [2021-11-20 06:11:03,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724013667] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:11:03,803 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:11:03,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-11-20 06:11:03,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325106779] [2021-11-20 06:11:03,804 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:11:03,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:11:03,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:03,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:11:03,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:11:03,806 INFO L87 Difference]: Start difference. First operand 199 states and 279 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 4 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-20 06:11:04,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:11:04,108 INFO L93 Difference]: Finished difference Result 287 states and 420 transitions. [2021-11-20 06:11:04,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:11:04,109 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 4 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 70 [2021-11-20 06:11:04,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:11:04,112 INFO L225 Difference]: With dead ends: 287 [2021-11-20 06:11:04,112 INFO L226 Difference]: Without dead ends: 285 [2021-11-20 06:11:04,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:11:04,114 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 21 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:11:04,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 245 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:11:04,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-11-20 06:11:04,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 203. [2021-11-20 06:11:04,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 117 states have (on average 1.170940170940171) internal successors, (137), 124 states have internal predecessors, (137), 73 states have call successors, (73), 12 states have call predecessors, (73), 12 states have return successors, (72), 66 states have call predecessors, (72), 72 states have call successors, (72) [2021-11-20 06:11:04,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 282 transitions. [2021-11-20 06:11:04,169 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 282 transitions. Word has length 70 [2021-11-20 06:11:04,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:11:04,170 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 282 transitions. [2021-11-20 06:11:04,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 4 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-20 06:11:04,171 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 282 transitions. [2021-11-20 06:11:04,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 06:11:04,172 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:11:04,172 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:11:04,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 06:11:04,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:11:04,387 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:11:04,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:04,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1439093215, now seen corresponding path program 1 times [2021-11-20 06:11:04,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:04,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338007073] [2021-11-20 06:11:04,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:04,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:04,398 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:11:04,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [24598083] [2021-11-20 06:11:04,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:04,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:11:04,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:11:04,400 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:11:04,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 06:11:04,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:04,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-20 06:11:04,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:11:04,919 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-20 06:11:04,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:11:05,176 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-20 06:11:05,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:05,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338007073] [2021-11-20 06:11:05,177 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:11:05,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24598083] [2021-11-20 06:11:05,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24598083] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:11:05,178 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:11:05,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-11-20 06:11:05,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966700423] [2021-11-20 06:11:05,178 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:11:05,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 06:11:05,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:05,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 06:11:05,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:11:05,180 INFO L87 Difference]: Start difference. First operand 203 states and 282 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-20 06:11:06,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:11:06,100 INFO L93 Difference]: Finished difference Result 250 states and 347 transitions. [2021-11-20 06:11:06,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 06:11:06,101 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 68 [2021-11-20 06:11:06,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:11:06,106 INFO L225 Difference]: With dead ends: 250 [2021-11-20 06:11:06,106 INFO L226 Difference]: Without dead ends: 248 [2021-11-20 06:11:06,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-11-20 06:11:06,110 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 60 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:11:06,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 324 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 06:11:06,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-11-20 06:11:06,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 211. [2021-11-20 06:11:06,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 123 states have (on average 1.1626016260162602) internal successors, (143), 130 states have internal predecessors, (143), 73 states have call successors, (73), 14 states have call predecessors, (73), 14 states have return successors, (72), 66 states have call predecessors, (72), 72 states have call successors, (72) [2021-11-20 06:11:06,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 288 transitions. [2021-11-20 06:11:06,194 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 288 transitions. Word has length 68 [2021-11-20 06:11:06,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:11:06,195 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 288 transitions. [2021-11-20 06:11:06,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-20 06:11:06,195 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 288 transitions. [2021-11-20 06:11:06,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-20 06:11:06,197 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:11:06,197 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:11:06,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 06:11:06,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 06:11:06,412 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:11:06,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:06,412 INFO L85 PathProgramCache]: Analyzing trace with hash 798002477, now seen corresponding path program 2 times [2021-11-20 06:11:06,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:06,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008870640] [2021-11-20 06:11:06,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:06,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:06,423 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:11:06,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1183852600] [2021-11-20 06:11:06,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:11:06,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:11:06,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:11:06,430 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:11:06,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 06:11:06,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:11:06,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:11:06,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:11:06,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:11:06,679 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-20 06:11:06,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:11:06,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:06,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008870640] [2021-11-20 06:11:06,680 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:11:06,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183852600] [2021-11-20 06:11:06,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183852600] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:11:06,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:11:06,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:11:06,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072547434] [2021-11-20 06:11:06,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:11:06,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:11:06,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:06,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:11:06,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:11:06,682 INFO L87 Difference]: Start difference. First operand 211 states and 288 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-20 06:11:06,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:11:06,807 INFO L93 Difference]: Finished difference Result 363 states and 496 transitions. [2021-11-20 06:11:06,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:11:06,808 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 73 [2021-11-20 06:11:06,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:11:06,811 INFO L225 Difference]: With dead ends: 363 [2021-11-20 06:11:06,811 INFO L226 Difference]: Without dead ends: 231 [2021-11-20 06:11:06,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:11:06,813 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 3 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:11:06,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 132 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:11:06,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-11-20 06:11:06,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 220. [2021-11-20 06:11:06,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 132 states have (on average 1.1818181818181819) internal successors, (156), 133 states have internal predecessors, (156), 73 states have call successors, (73), 14 states have call predecessors, (73), 14 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2021-11-20 06:11:06,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 301 transitions. [2021-11-20 06:11:06,875 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 301 transitions. Word has length 73 [2021-11-20 06:11:06,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:11:06,876 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 301 transitions. [2021-11-20 06:11:06,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-20 06:11:06,876 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 301 transitions. [2021-11-20 06:11:06,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-20 06:11:06,878 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:11:06,878 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:11:06,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 06:11:07,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 06:11:07,091 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:11:07,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:07,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1622368081, now seen corresponding path program 3 times [2021-11-20 06:11:07,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:07,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619717854] [2021-11-20 06:11:07,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:07,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:07,101 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:11:07,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [5834210] [2021-11-20 06:11:07,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:11:07,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:11:07,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:11:07,103 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:11:07,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 06:11:07,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 06:11:07,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:11:07,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-20 06:11:07,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:11:07,896 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-20 06:11:07,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:11:11,515 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-20 06:11:11,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:11,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619717854] [2021-11-20 06:11:11,516 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:11:11,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5834210] [2021-11-20 06:11:11,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5834210] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:11:11,517 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:11:11,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-11-20 06:11:11,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049111003] [2021-11-20 06:11:11,517 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:11:11,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 06:11:11,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:11,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 06:11:11,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=393, Unknown=1, NotChecked=0, Total=462 [2021-11-20 06:11:11,520 INFO L87 Difference]: Start difference. First operand 220 states and 301 transitions. Second operand has 22 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-20 06:11:16,477 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:11:17,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:11:17,291 INFO L93 Difference]: Finished difference Result 275 states and 376 transitions. [2021-11-20 06:11:17,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 06:11:17,292 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 73 [2021-11-20 06:11:17,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:11:17,295 INFO L225 Difference]: With dead ends: 275 [2021-11-20 06:11:17,295 INFO L226 Difference]: Without dead ends: 271 [2021-11-20 06:11:17,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=288, Invalid=1271, Unknown=1, NotChecked=0, Total=1560 [2021-11-20 06:11:17,298 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 103 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:11:17,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 568 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-11-20 06:11:17,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-11-20 06:11:17,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 222. [2021-11-20 06:11:17,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 134 states have (on average 1.171641791044776) internal successors, (157), 134 states have internal predecessors, (157), 73 states have call successors, (73), 15 states have call predecessors, (73), 14 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2021-11-20 06:11:17,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 302 transitions. [2021-11-20 06:11:17,390 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 302 transitions. Word has length 73 [2021-11-20 06:11:17,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:11:17,390 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 302 transitions. [2021-11-20 06:11:17,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-20 06:11:17,391 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 302 transitions. [2021-11-20 06:11:17,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-20 06:11:17,393 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:11:17,394 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:11:17,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 06:11:17,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-20 06:11:17,603 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:11:17,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:17,603 INFO L85 PathProgramCache]: Analyzing trace with hash 160585404, now seen corresponding path program 1 times [2021-11-20 06:11:17,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:17,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142131661] [2021-11-20 06:11:17,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:17,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:17,626 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:11:17,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [604933443] [2021-11-20 06:11:17,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:17,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:11:17,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:11:17,629 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:11:17,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 06:11:17,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:17,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-20 06:11:17,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:11:21,812 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 52 proven. 28 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-20 06:11:21,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:11:25,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:25,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142131661] [2021-11-20 06:11:25,725 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:11:25,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604933443] [2021-11-20 06:11:25,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604933443] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:11:25,726 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:11:25,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-20 06:11:25,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592678584] [2021-11-20 06:11:25,726 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:11:25,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 06:11:25,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:25,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 06:11:25,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-11-20 06:11:25,728 INFO L87 Difference]: Start difference. First operand 222 states and 302 transitions. Second operand has 18 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-20 06:11:28,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:11:28,015 INFO L93 Difference]: Finished difference Result 316 states and 429 transitions. [2021-11-20 06:11:28,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 06:11:28,016 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 87 [2021-11-20 06:11:28,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:11:28,018 INFO L225 Difference]: With dead ends: 316 [2021-11-20 06:11:28,019 INFO L226 Difference]: Without dead ends: 311 [2021-11-20 06:11:28,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 06:11:28,020 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 73 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:11:28,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 529 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-20 06:11:28,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-11-20 06:11:28,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 291. [2021-11-20 06:11:28,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 171 states have (on average 1.1871345029239766) internal successors, (203), 171 states have internal predecessors, (203), 101 states have call successors, (101), 19 states have call predecessors, (101), 18 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-20 06:11:28,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 404 transitions. [2021-11-20 06:11:28,113 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 404 transitions. Word has length 87 [2021-11-20 06:11:28,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:11:28,114 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 404 transitions. [2021-11-20 06:11:28,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-20 06:11:28,114 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 404 transitions. [2021-11-20 06:11:28,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-20 06:11:28,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:11:28,116 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:11:28,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 06:11:28,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 06:11:28,323 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:11:28,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:28,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1330396859, now seen corresponding path program 2 times [2021-11-20 06:11:28,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:28,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812803636] [2021-11-20 06:11:28,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:28,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:28,331 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:11:28,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1903934428] [2021-11-20 06:11:28,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:11:28,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:11:28,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:11:28,344 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:11:28,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 06:11:28,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:11:28,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:11:28,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 06:11:28,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:11:28,596 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-11-20 06:11:28,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:11:28,787 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-11-20 06:11:28,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:28,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812803636] [2021-11-20 06:11:28,787 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:11:28,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903934428] [2021-11-20 06:11:28,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903934428] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:11:28,788 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:11:28,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-11-20 06:11:28,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395576625] [2021-11-20 06:11:28,788 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:11:28,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 06:11:28,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:28,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 06:11:28,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:11:28,790 INFO L87 Difference]: Start difference. First operand 291 states and 404 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-20 06:11:29,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:11:29,685 INFO L93 Difference]: Finished difference Result 362 states and 501 transitions. [2021-11-20 06:11:29,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-20 06:11:29,686 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 95 [2021-11-20 06:11:29,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:11:29,689 INFO L225 Difference]: With dead ends: 362 [2021-11-20 06:11:29,689 INFO L226 Difference]: Without dead ends: 357 [2021-11-20 06:11:29,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2021-11-20 06:11:29,690 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 61 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:11:29,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 503 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 06:11:29,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-11-20 06:11:29,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 277. [2021-11-20 06:11:29,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 161 states have (on average 1.1925465838509317) internal successors, (192), 161 states have internal predecessors, (192), 97 states have call successors, (97), 19 states have call predecessors, (97), 18 states have return successors, (96), 96 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-20 06:11:29,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 385 transitions. [2021-11-20 06:11:29,781 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 385 transitions. Word has length 95 [2021-11-20 06:11:29,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:11:29,781 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 385 transitions. [2021-11-20 06:11:29,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-20 06:11:29,782 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 385 transitions. [2021-11-20 06:11:29,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-20 06:11:29,784 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:11:29,784 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:11:29,814 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-11-20 06:11:29,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 06:11:29,999 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:11:29,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:29,999 INFO L85 PathProgramCache]: Analyzing trace with hash 28846429, now seen corresponding path program 2 times [2021-11-20 06:11:29,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:29,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023788800] [2021-11-20 06:11:29,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:29,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:30,007 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:11:30,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2024805398] [2021-11-20 06:11:30,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:11:30,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:11:30,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:11:30,008 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:11:30,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 06:11:30,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:11:30,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:11:30,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-20 06:11:30,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:11:31,224 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 32 proven. 56 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2021-11-20 06:11:31,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:11:35,778 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 32 proven. 56 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2021-11-20 06:11:35,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:35,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023788800] [2021-11-20 06:11:35,778 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:11:35,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024805398] [2021-11-20 06:11:35,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024805398] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:11:35,779 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:11:35,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-11-20 06:11:35,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355707202] [2021-11-20 06:11:35,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:11:35,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-20 06:11:35,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:35,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-20 06:11:35,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2021-11-20 06:11:35,780 INFO L87 Difference]: Start difference. First operand 277 states and 385 transitions. Second operand has 28 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 9 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-20 06:11:44,735 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:12:03,654 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:12:06,001 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:12:12,448 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:12:20,802 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.64s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:12:23,201 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.26s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:12:26,444 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:12:42,051 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:12:44,289 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:12:51,044 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:13:02,085 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:13:03,251 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:13:09,537 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:13:11,447 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:13:15,649 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:13:16,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:13:16,670 INFO L93 Difference]: Finished difference Result 546 states and 794 transitions. [2021-11-20 06:13:16,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-11-20 06:13:16,671 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 9 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) Word has length 109 [2021-11-20 06:13:16,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:13:16,676 INFO L225 Difference]: With dead ends: 546 [2021-11-20 06:13:16,676 INFO L226 Difference]: Without dead ends: 540 [2021-11-20 06:13:16,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 191 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2220 ImplicationChecksByTransitivity, 34.3s TimeCoverageRelationStatistics Valid=1387, Invalid=6985, Unknown=0, NotChecked=0, Total=8372 [2021-11-20 06:13:16,681 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 197 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 2096 mSolverCounterSat, 740 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 69.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 983 SdHoareTripleChecker+Invalid, 2843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 740 IncrementalHoareTripleChecker+Valid, 2096 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 70.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:13:16,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 983 Invalid, 2843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [740 Valid, 2096 Invalid, 7 Unknown, 0 Unchecked, 70.3s Time] [2021-11-20 06:13:16,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-20 06:13:16,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 420. [2021-11-20 06:13:16,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 236 states have (on average 1.2245762711864407) internal successors, (289), 236 states have internal predecessors, (289), 161 states have call successors, (161), 23 states have call predecessors, (161), 22 states have return successors, (160), 160 states have call predecessors, (160), 160 states have call successors, (160) [2021-11-20 06:13:16,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 610 transitions. [2021-11-20 06:13:16,910 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 610 transitions. Word has length 109 [2021-11-20 06:13:16,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:13:16,911 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 610 transitions. [2021-11-20 06:13:16,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 9 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-20 06:13:16,911 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 610 transitions. [2021-11-20 06:13:16,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-20 06:13:16,915 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:13:16,915 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:13:16,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 06:13:17,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 06:13:17,143 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:13:17,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:13:17,144 INFO L85 PathProgramCache]: Analyzing trace with hash -876975624, now seen corresponding path program 3 times [2021-11-20 06:13:17,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:13:17,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359035639] [2021-11-20 06:13:17,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:13:17,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:13:17,156 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:13:17,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1404991742] [2021-11-20 06:13:17,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:13:17,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:13:17,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:13:17,159 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:13:17,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 06:13:17,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-20 06:13:17,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:13:17,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-20 06:13:17,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:13:19,107 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 73 proven. 49 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2021-11-20 06:13:19,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:13:21,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:13:21,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359035639] [2021-11-20 06:13:21,479 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:13:21,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404991742] [2021-11-20 06:13:21,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404991742] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:13:21,480 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:13:21,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-20 06:13:21,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278356024] [2021-11-20 06:13:21,481 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:13:21,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 06:13:21,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:13:21,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 06:13:21,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-11-20 06:13:21,482 INFO L87 Difference]: Start difference. First operand 420 states and 610 transitions. Second operand has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-20 06:13:23,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:13:23,675 INFO L93 Difference]: Finished difference Result 500 states and 707 transitions. [2021-11-20 06:13:23,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 06:13:23,675 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 112 [2021-11-20 06:13:23,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:13:23,679 INFO L225 Difference]: With dead ends: 500 [2021-11-20 06:13:23,679 INFO L226 Difference]: Without dead ends: 495 [2021-11-20 06:13:23,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=227, Invalid=1255, Unknown=0, NotChecked=0, Total=1482 [2021-11-20 06:13:23,681 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 78 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:13:23,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 648 Invalid, 1129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-20 06:13:23,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-11-20 06:13:23,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 471. [2021-11-20 06:13:23,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 267 states have (on average 1.2172284644194757) internal successors, (325), 267 states have internal predecessors, (325), 177 states have call successors, (177), 27 states have call predecessors, (177), 26 states have return successors, (176), 176 states have call predecessors, (176), 176 states have call successors, (176) [2021-11-20 06:13:23,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 678 transitions. [2021-11-20 06:13:23,910 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 678 transitions. Word has length 112 [2021-11-20 06:13:23,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:13:23,911 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 678 transitions. [2021-11-20 06:13:23,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-20 06:13:23,912 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 678 transitions. [2021-11-20 06:13:23,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-20 06:13:23,914 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:13:23,915 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:13:23,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-20 06:13:24,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:13:24,131 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:13:24,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:13:24,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1746474790, now seen corresponding path program 4 times [2021-11-20 06:13:24,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:13:24,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425155470] [2021-11-20 06:13:24,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:13:24,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:13:24,140 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:13:24,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [144986127] [2021-11-20 06:13:24,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:13:24,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:13:24,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:13:24,144 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:13:24,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 06:13:24,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:13:24,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:13:24,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 101 conjunts are in the unsatisfiable core [2021-11-20 06:13:24,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:13:25,788 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 89 proven. 85 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-11-20 06:13:25,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:13:27,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:13:27,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425155470] [2021-11-20 06:13:27,805 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:13:27,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144986127] [2021-11-20 06:13:27,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144986127] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:13:27,806 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:13:27,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-11-20 06:13:27,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994401660] [2021-11-20 06:13:27,807 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:13:27,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 06:13:27,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:13:27,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 06:13:27,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-11-20 06:13:27,809 INFO L87 Difference]: Start difference. First operand 471 states and 678 transitions. Second operand has 21 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-20 06:13:29,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:13:29,783 INFO L93 Difference]: Finished difference Result 597 states and 847 transitions. [2021-11-20 06:13:29,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 06:13:29,784 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) Word has length 117 [2021-11-20 06:13:29,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:13:29,788 INFO L225 Difference]: With dead ends: 597 [2021-11-20 06:13:29,788 INFO L226 Difference]: Without dead ends: 592 [2021-11-20 06:13:29,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=154, Invalid=1178, Unknown=0, NotChecked=0, Total=1332 [2021-11-20 06:13:29,790 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 96 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 1316 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 1424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:13:29,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 799 Invalid, 1424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1316 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 06:13:29,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-11-20 06:13:30,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 559. [2021-11-20 06:13:30,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 314 states have (on average 1.2229299363057324) internal successors, (384), 314 states have internal predecessors, (384), 213 states have call successors, (213), 32 states have call predecessors, (213), 31 states have return successors, (212), 212 states have call predecessors, (212), 212 states have call successors, (212) [2021-11-20 06:13:30,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 809 transitions. [2021-11-20 06:13:30,074 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 809 transitions. Word has length 117 [2021-11-20 06:13:30,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:13:30,074 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 809 transitions. [2021-11-20 06:13:30,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-20 06:13:30,074 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 809 transitions. [2021-11-20 06:13:30,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-20 06:13:30,076 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:13:30,076 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:13:30,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-20 06:13:30,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:13:30,303 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:13:30,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:13:30,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1205856153, now seen corresponding path program 5 times [2021-11-20 06:13:30,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:13:30,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747917409] [2021-11-20 06:13:30,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:13:30,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:13:30,313 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:13:30,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1047619809] [2021-11-20 06:13:30,317 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:13:30,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:13:30,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:13:30,318 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:13:30,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-20 06:13:30,379 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-20 06:13:30,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:13:30,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:13:30,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:13:30,712 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 250 proven. 18 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-11-20 06:13:30,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:13:31,033 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 66 proven. 18 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2021-11-20 06:13:31,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:13:31,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747917409] [2021-11-20 06:13:31,033 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:13:31,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047619809] [2021-11-20 06:13:31,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047619809] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:13:31,034 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:13:31,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-11-20 06:13:31,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829332876] [2021-11-20 06:13:31,034 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:13:31,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:13:31,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:13:31,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:13:31,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:13:31,035 INFO L87 Difference]: Start difference. First operand 559 states and 809 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 5 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) [2021-11-20 06:13:31,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:13:31,530 INFO L93 Difference]: Finished difference Result 979 states and 1451 transitions. [2021-11-20 06:13:31,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:13:31,531 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 5 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) Word has length 134 [2021-11-20 06:13:31,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:13:31,536 INFO L225 Difference]: With dead ends: 979 [2021-11-20 06:13:31,536 INFO L226 Difference]: Without dead ends: 709 [2021-11-20 06:13:31,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 260 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:13:31,538 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 9 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:13:31,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 308 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:13:31,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2021-11-20 06:13:31,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 673. [2021-11-20 06:13:31,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 368 states have (on average 1.233695652173913) internal successors, (454), 376 states have internal predecessors, (454), 273 states have call successors, (273), 32 states have call predecessors, (273), 31 states have return successors, (272), 264 states have call predecessors, (272), 272 states have call successors, (272) [2021-11-20 06:13:31,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 999 transitions. [2021-11-20 06:13:31,898 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 999 transitions. Word has length 134 [2021-11-20 06:13:31,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:13:31,898 INFO L470 AbstractCegarLoop]: Abstraction has 673 states and 999 transitions. [2021-11-20 06:13:31,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 5 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) [2021-11-20 06:13:31,899 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 999 transitions. [2021-11-20 06:13:31,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-20 06:13:31,902 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:13:31,902 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:13:31,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-20 06:13:32,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-20 06:13:32,119 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:13:32,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:13:32,119 INFO L85 PathProgramCache]: Analyzing trace with hash -693232369, now seen corresponding path program 6 times [2021-11-20 06:13:32,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:13:32,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480588691] [2021-11-20 06:13:32,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:13:32,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:13:32,127 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:13:32,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [58952460] [2021-11-20 06:13:32,130 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:13:32,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:13:32,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:13:32,132 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:13:32,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-20 06:13:32,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-20 06:13:32,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:13:32,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-20 06:13:32,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:13:34,134 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 91 proven. 139 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2021-11-20 06:13:34,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:13:55,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:13:55,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480588691] [2021-11-20 06:13:55,404 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:13:55,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58952460] [2021-11-20 06:13:55,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58952460] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:13:55,405 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:13:55,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-20 06:13:55,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348525452] [2021-11-20 06:13:55,405 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:13:55,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 06:13:55,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:13:55,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 06:13:55,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=797, Unknown=5, NotChecked=0, Total=930 [2021-11-20 06:13:55,406 INFO L87 Difference]: Start difference. First operand 673 states and 999 transitions. Second operand has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2021-11-20 06:14:07,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:14:07,581 INFO L93 Difference]: Finished difference Result 855 states and 1260 transitions. [2021-11-20 06:14:07,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 06:14:07,583 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) Word has length 134 [2021-11-20 06:14:07,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:14:07,589 INFO L225 Difference]: With dead ends: 855 [2021-11-20 06:14:07,589 INFO L226 Difference]: Without dead ends: 850 [2021-11-20 06:14:07,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 166 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 29.8s TimeCoverageRelationStatistics Valid=246, Invalid=1386, Unknown=8, NotChecked=0, Total=1640 [2021-11-20 06:14:07,591 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 68 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:14:07,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 667 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-20 06:14:07,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2021-11-20 06:14:07,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 812. [2021-11-20 06:14:07,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 443 states have (on average 1.234762979683973) internal successors, (547), 454 states have internal predecessors, (547), 332 states have call successors, (332), 37 states have call predecessors, (332), 36 states have return successors, (331), 320 states have call predecessors, (331), 331 states have call successors, (331) [2021-11-20 06:14:07,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1210 transitions. [2021-11-20 06:14:07,978 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1210 transitions. Word has length 134 [2021-11-20 06:14:07,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:14:07,979 INFO L470 AbstractCegarLoop]: Abstraction has 812 states and 1210 transitions. [2021-11-20 06:14:07,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2021-11-20 06:14:07,980 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1210 transitions. [2021-11-20 06:14:07,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-20 06:14:07,983 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:14:07,983 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:14:08,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-20 06:14:08,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-20 06:14:08,211 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:14:08,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:08,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1814649351, now seen corresponding path program 7 times [2021-11-20 06:14:08,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:14:08,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521585847] [2021-11-20 06:14:08,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:08,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:14:08,218 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:14:08,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [619453134] [2021-11-20 06:14:08,221 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 06:14:08,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:14:08,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:14:08,222 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:14:08,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-20 06:14:08,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:14:08,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 114 conjunts are in the unsatisfiable core [2021-11-20 06:14:08,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:14:10,985 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 115 proven. 142 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2021-11-20 06:14:10,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:14:16,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:14:16,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521585847] [2021-11-20 06:14:16,243 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:14:16,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619453134] [2021-11-20 06:14:16,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619453134] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:14:16,243 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:14:16,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-11-20 06:14:16,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917549713] [2021-11-20 06:14:16,244 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:14:16,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-20 06:14:16,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:14:16,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-20 06:14:16,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2021-11-20 06:14:16,246 INFO L87 Difference]: Start difference. First operand 812 states and 1210 transitions. Second operand has 27 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 24 states have internal predecessors, (50), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 8 states have call successors, (20) [2021-11-20 06:14:19,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:14:19,913 INFO L93 Difference]: Finished difference Result 938 states and 1375 transitions. [2021-11-20 06:14:19,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-20 06:14:19,914 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 24 states have internal predecessors, (50), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 8 states have call successors, (20) Word has length 139 [2021-11-20 06:14:19,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:14:19,921 INFO L225 Difference]: With dead ends: 938 [2021-11-20 06:14:19,921 INFO L226 Difference]: Without dead ends: 933 [2021-11-20 06:14:19,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=268, Invalid=2084, Unknown=0, NotChecked=0, Total=2352 [2021-11-20 06:14:19,924 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 132 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 1793 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 1953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 1793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:14:19,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 640 Invalid, 1953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 1793 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-20 06:14:19,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2021-11-20 06:14:20,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 893. [2021-11-20 06:14:20,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 489 states have (on average 1.231083844580777) internal successors, (602), 502 states have internal predecessors, (602), 361 states have call successors, (361), 43 states have call predecessors, (361), 42 states have return successors, (360), 347 states have call predecessors, (360), 360 states have call successors, (360) [2021-11-20 06:14:20,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1323 transitions. [2021-11-20 06:14:20,324 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1323 transitions. Word has length 139 [2021-11-20 06:14:20,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:14:20,324 INFO L470 AbstractCegarLoop]: Abstraction has 893 states and 1323 transitions. [2021-11-20 06:14:20,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 24 states have internal predecessors, (50), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 8 states have call successors, (20) [2021-11-20 06:14:20,325 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1323 transitions. [2021-11-20 06:14:20,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-20 06:14:20,329 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:14:20,329 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:14:20,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-11-20 06:14:20,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-20 06:14:20,546 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:14:20,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:20,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1917326542, now seen corresponding path program 8 times [2021-11-20 06:14:20,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:14:20,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331338206] [2021-11-20 06:14:20,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:20,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:14:20,552 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:14:20,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1413621810] [2021-11-20 06:14:20,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:14:20,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:14:20,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:14:20,554 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:14:20,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-20 06:14:20,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:14:20,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:14:20,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 103 conjunts are in the unsatisfiable core [2021-11-20 06:14:20,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:14:22,504 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 66 proven. 134 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-11-20 06:14:22,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:14:26,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:14:26,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331338206] [2021-11-20 06:14:26,781 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:14:26,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413621810] [2021-11-20 06:14:26,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413621810] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:14:26,781 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:14:26,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-11-20 06:14:26,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989885600] [2021-11-20 06:14:26,782 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:14:26,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 06:14:26,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:14:26,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 06:14:26,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-11-20 06:14:26,783 INFO L87 Difference]: Start difference. First operand 893 states and 1323 transitions. Second operand has 23 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) [2021-11-20 06:14:29,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:14:29,416 INFO L93 Difference]: Finished difference Result 1011 states and 1478 transitions. [2021-11-20 06:14:29,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 06:14:29,416 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) Word has length 142 [2021-11-20 06:14:29,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:14:29,423 INFO L225 Difference]: With dead ends: 1011 [2021-11-20 06:14:29,423 INFO L226 Difference]: Without dead ends: 1006 [2021-11-20 06:14:29,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=160, Invalid=1400, Unknown=0, NotChecked=0, Total=1560 [2021-11-20 06:14:29,426 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 90 mSDsluCounter, 891 mSDsCounter, 0 mSdLazyCounter, 1577 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 1660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:14:29,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 953 Invalid, 1660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1577 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-20 06:14:29,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2021-11-20 06:14:29,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 896. [2021-11-20 06:14:29,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 492 states have (on average 1.2296747967479675) internal successors, (605), 505 states have internal predecessors, (605), 360 states have call successors, (360), 44 states have call predecessors, (360), 43 states have return successors, (359), 346 states have call predecessors, (359), 359 states have call successors, (359) [2021-11-20 06:14:29,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1324 transitions. [2021-11-20 06:14:29,859 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1324 transitions. Word has length 142 [2021-11-20 06:14:29,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:14:29,859 INFO L470 AbstractCegarLoop]: Abstraction has 896 states and 1324 transitions. [2021-11-20 06:14:29,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) [2021-11-20 06:14:29,860 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1324 transitions. [2021-11-20 06:14:29,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-20 06:14:29,864 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:14:29,864 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:14:29,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-20 06:14:30,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-20 06:14:30,091 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:14:30,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:30,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1075315432, now seen corresponding path program 9 times [2021-11-20 06:14:30,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:14:30,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420213422] [2021-11-20 06:14:30,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:30,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:14:30,098 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:14:30,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1827921690] [2021-11-20 06:14:30,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:14:30,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:14:30,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:14:30,099 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:14:30,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3e4e6dc-00ad-45a8-a6e1-c1ffb0e9727b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-20 06:14:30,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-20 06:14:30,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:14:30,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 116 conjunts are in the unsatisfiable core [2021-11-20 06:14:30,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:14:33,411 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 76 proven. 97 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2021-11-20 06:14:33,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:14:46,338 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 70 proven. 91 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2021-11-20 06:14:46,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:14:46,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420213422] [2021-11-20 06:14:46,338 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:14:46,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827921690] [2021-11-20 06:14:46,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827921690] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:14:46,339 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:14:46,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 24] total 46 [2021-11-20 06:14:46,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245513742] [2021-11-20 06:14:46,339 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:14:46,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-20 06:14:46,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:14:46,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-20 06:14:46,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1701, Unknown=0, NotChecked=0, Total=2070 [2021-11-20 06:14:46,341 INFO L87 Difference]: Start difference. First operand 896 states and 1324 transitions. Second operand has 46 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 44 states have internal predecessors, (91), 13 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (40), 12 states have call predecessors, (40), 11 states have call successors, (40) [2021-11-20 06:15:00,342 WARN L227 SmtUtils]: Spent 9.00s on a formula simplification that was a NOOP. DAG size: 165 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:15:02,528 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:15:19,934 WARN L227 SmtUtils]: Spent 6.25s on a formula simplification that was a NOOP. DAG size: 171 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:15:23,389 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:15:25,116 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:15:27,161 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:15:29,284 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:15:31,288 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:15:32,618 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:15:34,702 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:15:37,229 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:15:38,494 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:15:44,623 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:15:46,630 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:15:49,568 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:15:51,571 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:16:05,769 WARN L227 SmtUtils]: Spent 9.52s on a formula simplification that was a NOOP. DAG size: 148 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:16:08,090 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:16:10,295 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:16:36,217 WARN L227 SmtUtils]: Spent 6.44s on a formula simplification that was a NOOP. DAG size: 147 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:16:58,461 WARN L227 SmtUtils]: Spent 16.35s on a formula simplification that was a NOOP. DAG size: 169 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:17:04,039 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:17:07,915 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:17:19,512 WARN L227 SmtUtils]: Spent 5.58s on a formula simplification that was a NOOP. DAG size: 142 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:17:21,519 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:17:23,456 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:17:25,860 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:17:40,153 WARN L227 SmtUtils]: Spent 9.10s on a formula simplification that was a NOOP. DAG size: 175 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:17:44,448 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:17:46,451 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:17:49,207 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:17:51,213 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:18:03,108 WARN L227 SmtUtils]: Spent 7.55s on a formula simplification that was a NOOP. DAG size: 152 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:18:05,169 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:18:08,660 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:18:18,421 WARN L227 SmtUtils]: Spent 5.74s on a formula simplification that was a NOOP. DAG size: 153 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:18:36,228 WARN L227 SmtUtils]: Spent 12.47s on a formula simplification that was a NOOP. DAG size: 160 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:18:38,423 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:18:49,814 WARN L227 SmtUtils]: Spent 5.29s on a formula simplification that was a NOOP. DAG size: 166 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:18:51,821 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:18:53,825 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:18:58,126 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.38s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:19:00,364 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.23s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:19:24,868 WARN L227 SmtUtils]: Spent 19.56s on a formula simplification. DAG size of input: 164 DAG size of output: 160 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:19:29,829 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:19:31,838 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse14 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse13 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse2 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse3 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|))) (let ((.cse6 (+ .cse2 .cse3)) (.cse35 (* 2 .cse13)) (.cse36 (* 2 .cse14)) (.cse4 (+ |c_ULTIMATE.start_main_~b~0#1| .cse13 .cse14)) (.cse10 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse12 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse20 (* 3 .cse2)) (.cse21 (* 3 .cse3)) (.cse28 (* 2 |c_ULTIMATE.start_main_~b~0#1|)) (.cse37 (* 3 .cse13)) (.cse38 (* 3 .cse14))) (let ((.cse23 (* 5 .cse3)) (.cse24 (* 5 .cse2)) (.cse25 (* 6 .cse2)) (.cse26 (* 6 .cse3)) (.cse22 (+ .cse37 .cse38 |c_ULTIMATE.start_main_~b~0#1|)) (.cse27 (+ .cse28 .cse13 .cse14)) (.cse0 (+ .cse20 .cse21)) (.cse15 (+ .cse37 .cse38)) (.cse17 (* 3 .cse12)) (.cse18 (* 3 .cse10)) (.cse34 (not (= .cse4 (+ .cse2 .cse3 |c_ULTIMATE.start_main_~c~0#1| .cse10 .cse12)))) (.cse5 (+ .cse13 .cse14)) (.cse33 (+ .cse2 .cse3 .cse10 .cse12)) (.cse29 (* 2 .cse10)) (.cse7 (* 2 .cse2)) (.cse30 (* 2 .cse12)) (.cse8 (* 2 .cse3)) (.cse1 (+ .cse35 .cse36)) (.cse31 (<= |c_ULTIMATE.start_main_~b~0#1| 0)) (.cse32 (not (= |c_ULTIMATE.start_main_~b~0#1| .cse6)))) (and (or (= .cse0 .cse1) (not (= (+ .cse2 .cse3 |c_ULTIMATE.start_main_~a~0#1|) .cse4)) (<= .cse5 .cse6) (not (= (+ .cse7 |c_ULTIMATE.start_main_~b~0#1| .cse8) .cse1))) (<= 0 |c_ULTIMATE.start_main_~x~0#1|) (<= 1 |c_ULTIMATE.start_main_~y~0#1|) (let ((.cse9 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~d~0#1|)) (.cse11 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~d~0#1|))) (let ((.cse16 (* 3 .cse11)) (.cse19 (* 3 .cse9))) (or (<= (* 2 |c_ULTIMATE.start_main_~v~0#1|) |c_ULTIMATE.start_main_~c~0#1|) (<= (+ .cse9 .cse2 .cse3 .cse10 .cse11 .cse12) .cse5) (not (= (+ .cse9 .cse2 .cse3 |c_ULTIMATE.start_main_~c~0#1| .cse10 .cse11 .cse12) (+ |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~v~0#1| .cse13 .cse14))) (= .cse15 (+ .cse7 .cse16 .cse17 .cse18 .cse19 .cse8)) (not (= (+ .cse20 .cse16 .cse17 .cse18 .cse19 .cse21) .cse22))))) (or (= .cse15 (+ .cse23 .cse24)) (not (= (+ .cse25 .cse26) .cse22)) (<= (+ .cse7 .cse8) .cse5) (not (= .cse27 (+ .cse7 |c_ULTIMATE.start_main_~a~0#1| .cse8)))) (<= |c_ULTIMATE.start_main_~x~0#1| 10) (or (<= .cse28 |c_ULTIMATE.start_main_~c~0#1|) (= .cse15 (+ .cse17 .cse18 .cse23 .cse24)) (not (= (+ .cse25 .cse26 .cse17 .cse18) .cse22)) (not (= .cse27 (+ .cse7 |c_ULTIMATE.start_main_~c~0#1| .cse10 .cse12 .cse8)))) (or (not (= (+ .cse29 |c_ULTIMATE.start_main_~b~0#1| .cse30) .cse1)) (<= .cse5 (+ .cse10 .cse12)) (not (= .cse5 (+ |c_ULTIMATE.start_main_~c~0#1| .cse10 .cse12))) (= (+ .cse29 .cse2 .cse3 .cse30) .cse1)) (or (not (= .cse28 |c_ULTIMATE.start_main_~a~0#1|)) .cse31 (= .cse4 .cse0) .cse32) (or (= .cse15 (+ .cse7 .cse17 .cse18 .cse8)) (<= .cse33 .cse5) .cse34 (not (= (+ .cse29 .cse7 .cse30 .cse8) (+ |c_ULTIMATE.start_main_~c~0#1| .cse35 .cse36)))) (or (= .cse4 .cse33) (<= |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~c~0#1|) (not (= |c_ULTIMATE.start_main_~c~0#1| 0))) (or (= (+ .cse29 .cse20 .cse30 .cse21) .cse1) .cse34 (<= .cse5 .cse33) (not (= (+ .cse29 .cse7 |c_ULTIMATE.start_main_~b~0#1| .cse30 .cse8) .cse1))) (or .cse31 (not (= .cse28 |c_ULTIMATE.start_main_~c~0#1|)) .cse32 (= (+ .cse20 .cse10 .cse12 .cse21) .cse4)))))) is different from false [2021-11-20 06:19:48,018 WARN L227 SmtUtils]: Spent 11.65s on a formula simplification that was a NOOP. DAG size: 166 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:19:54,686 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:20:07,611 WARN L227 SmtUtils]: Spent 6.23s on a formula simplification that was a NOOP. DAG size: 171 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:20:11,077 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:20:18,128 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:20:20,296 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:20:28,035 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:20:30,264 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:20:44,342 WARN L227 SmtUtils]: Spent 9.68s on a formula simplification that was a NOOP. DAG size: 143 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:20:58,108 WARN L227 SmtUtils]: Spent 5.18s on a formula simplification that was a NOOP. DAG size: 123 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:21:10,062 WARN L227 SmtUtils]: Spent 6.13s on a formula simplification that was a NOOP. DAG size: 142 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:21:37,959 WARN L227 SmtUtils]: Spent 18.48s on a formula simplification that was a NOOP. DAG size: 166 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:22:15,086 WARN L227 SmtUtils]: Spent 29.82s on a formula simplification that was a NOOP. DAG size: 164 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:22:18,508 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:22:20,638 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:22:22,705 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse27 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse26 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse24 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse25 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|))) (let ((.cse5 (+ .cse24 .cse25)) (.cse41 (* 3 .cse26)) (.cse42 (* 3 .cse27)) (.cse28 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~d~0#1|)) (.cse29 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~d~0#1|)) (.cse35 (* 2 .cse26)) (.cse36 (* 2 .cse27)) (.cse3 (+ |c_ULTIMATE.start_main_~b~0#1| .cse26 .cse27)) (.cse20 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse21 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse37 (* 3 .cse24)) (.cse38 (* 3 .cse25)) (.cse17 (* 2 |c_ULTIMATE.start_main_~b~0#1|))) (let ((.cse11 (* 5 .cse25)) (.cse12 (* 5 .cse24)) (.cse13 (* 6 .cse24)) (.cse14 (* 6 .cse25)) (.cse16 (+ .cse17 .cse26 .cse27)) (.cse2 (+ .cse24 .cse25 |c_ULTIMATE.start_main_~a~0#1|)) (.cse0 (+ .cse37 .cse38)) (.cse34 (not (= .cse3 (+ .cse24 .cse25 |c_ULTIMATE.start_main_~c~0#1| .cse20 .cse21)))) (.cse33 (+ .cse24 .cse25 .cse20 .cse21)) (.cse22 (* 2 .cse20)) (.cse23 (* 2 .cse21)) (.cse1 (+ .cse35 .cse36)) (.cse9 (+ .cse28 .cse24 .cse25 .cse20 .cse29 .cse21)) (.cse4 (+ .cse26 .cse27)) (.cse10 (+ .cse41 .cse42)) (.cse6 (* 2 .cse24)) (.cse7 (* 2 .cse25)) (.cse18 (* 3 .cse21)) (.cse19 (* 3 .cse20)) (.cse15 (+ .cse41 .cse42 |c_ULTIMATE.start_main_~b~0#1|)) (.cse30 (* 2 .cse29)) (.cse31 (* 2 .cse28)) (.cse8 (<= |c_ULTIMATE.start_main_~b~0#1| 0)) (.cse32 (not (= |c_ULTIMATE.start_main_~b~0#1| .cse5)))) (and (or (= .cse0 .cse1) (not (= .cse2 .cse3)) (<= .cse4 .cse5) (not (= (+ .cse6 |c_ULTIMATE.start_main_~b~0#1| .cse7) .cse1))) (or .cse8 (not (= |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~v~0#1|)) (= .cse3 .cse9)) (or (= .cse10 (+ .cse11 .cse12)) (not (= (+ .cse13 .cse14) .cse15)) (<= (+ .cse6 .cse7) .cse4) (not (= .cse16 (+ .cse6 |c_ULTIMATE.start_main_~a~0#1| .cse7)))) (or (<= .cse17 |c_ULTIMATE.start_main_~c~0#1|) (= .cse10 (+ .cse18 .cse19 .cse11 .cse12)) (not (= (+ .cse13 .cse14 .cse18 .cse19) .cse15)) (not (= .cse16 (+ .cse6 |c_ULTIMATE.start_main_~c~0#1| .cse20 .cse21 .cse7)))) (or (not (= (+ .cse22 |c_ULTIMATE.start_main_~b~0#1| .cse23) .cse1)) (<= .cse4 (+ .cse20 .cse21)) (not (= .cse4 (+ |c_ULTIMATE.start_main_~c~0#1| .cse20 .cse21))) (= (+ .cse22 .cse24 .cse25 .cse23) .cse1)) (or (not (= |c_ULTIMATE.start_main_~b~0#1| 0)) (= .cse2 .cse4)) (or (not (= (+ |c_ULTIMATE.start_main_~v~0#1| .cse26 .cse27) (+ .cse28 |c_ULTIMATE.start_main_~c~0#1| .cse20 .cse29 .cse21))) (<= .cse4 (+ .cse28 .cse20 .cse29 .cse21)) (= (+ .cse22 .cse24 .cse25 .cse30 .cse23 .cse31) .cse1) (not (= (+ .cse22 |c_ULTIMATE.start_main_~b~0#1| .cse30 .cse23 .cse31) .cse1))) (or (not (= .cse17 |c_ULTIMATE.start_main_~a~0#1|)) .cse8 (= .cse3 .cse0) .cse32) (or (= .cse10 (+ .cse6 .cse18 .cse19 .cse7)) (<= .cse33 .cse4) .cse34 (not (= (+ .cse22 .cse6 .cse23 .cse7) (+ |c_ULTIMATE.start_main_~c~0#1| .cse35 .cse36)))) (or (= .cse3 .cse33) (<= |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~c~0#1|) (not (= |c_ULTIMATE.start_main_~c~0#1| 0))) (or (= (+ .cse22 .cse37 .cse23 .cse38) .cse1) .cse34 (<= .cse4 .cse33) (not (= (+ .cse22 .cse6 |c_ULTIMATE.start_main_~b~0#1| .cse23 .cse7) .cse1))) (let ((.cse39 (* 3 .cse29)) (.cse40 (* 3 .cse28))) (or (<= .cse9 .cse4) (not (= (+ .cse28 .cse24 .cse25 |c_ULTIMATE.start_main_~c~0#1| .cse20 .cse29 .cse21) (+ |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~v~0#1| .cse26 .cse27))) (= .cse10 (+ .cse6 .cse39 .cse18 .cse19 .cse40 .cse7)) (not (= (+ .cse37 .cse39 .cse18 .cse19 .cse40 .cse38) .cse15)))) (or .cse8 (not (= .cse17 |c_ULTIMATE.start_main_~c~0#1|)) .cse32 (= (+ .cse37 .cse20 .cse21 .cse38) .cse3)) (or (= .cse3 (+ .cse24 .cse25 .cse30 .cse20 .cse21 .cse31)) .cse8 .cse32 (not (= (* 2 |c_ULTIMATE.start_main_~v~0#1|) |c_ULTIMATE.start_main_~c~0#1|))))))) is different from false [2021-11-20 06:22:39,543 WARN L227 SmtUtils]: Spent 6.69s on a formula simplification that was a NOOP. DAG size: 137 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:22:42,074 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:23:09,695 WARN L227 SmtUtils]: Spent 24.64s on a formula simplification. DAG size of input: 159 DAG size of output: 155 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:23:25,678 WARN L227 SmtUtils]: Spent 11.06s on a formula simplification that was a NOOP. DAG size: 160 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:23:41,145 WARN L227 SmtUtils]: Spent 13.25s on a formula simplification that was a NOOP. DAG size: 151 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:23:43,207 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:23:45,551 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:23:47,417 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:23:50,384 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:23:56,584 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:23:58,612 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse24 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse23 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse2 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse3 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|))) (let ((.cse6 (+ .cse2 .cse3)) (.cse25 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~d~0#1|)) (.cse26 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~d~0#1|)) (.cse39 (* 3 .cse23)) (.cse40 (* 3 .cse24)) (.cse33 (* 2 .cse23)) (.cse34 (* 2 .cse24)) (.cse4 (+ |c_ULTIMATE.start_main_~b~0#1| .cse23 .cse24)) (.cse19 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse20 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse35 (* 3 .cse2)) (.cse36 (* 3 .cse3)) (.cse16 (* 2 |c_ULTIMATE.start_main_~b~0#1|))) (let ((.cse10 (* 5 .cse3)) (.cse11 (* 5 .cse2)) (.cse12 (* 6 .cse2)) (.cse13 (* 6 .cse3)) (.cse15 (+ .cse16 .cse23 .cse24)) (.cse0 (+ .cse35 .cse36)) (.cse32 (not (= .cse4 (+ .cse2 .cse3 |c_ULTIMATE.start_main_~c~0#1| .cse19 .cse20)))) (.cse31 (+ .cse2 .cse3 .cse19 .cse20)) (.cse21 (* 2 .cse19)) (.cse22 (* 2 .cse20)) (.cse1 (+ .cse33 .cse34)) (.cse5 (+ .cse23 .cse24)) (.cse9 (+ .cse39 .cse40)) (.cse7 (* 2 .cse2)) (.cse8 (* 2 .cse3)) (.cse17 (* 3 .cse20)) (.cse18 (* 3 .cse19)) (.cse14 (+ .cse39 .cse40 |c_ULTIMATE.start_main_~b~0#1|)) (.cse27 (* 2 .cse26)) (.cse28 (* 2 .cse25)) (.cse29 (<= |c_ULTIMATE.start_main_~b~0#1| 0)) (.cse30 (not (= |c_ULTIMATE.start_main_~b~0#1| .cse6)))) (and (or (= .cse0 .cse1) (not (= (+ .cse2 .cse3 |c_ULTIMATE.start_main_~a~0#1|) .cse4)) (<= .cse5 .cse6) (not (= (+ .cse7 |c_ULTIMATE.start_main_~b~0#1| .cse8) .cse1))) (or (= .cse9 (+ .cse10 .cse11)) (not (= (+ .cse12 .cse13) .cse14)) (<= (+ .cse7 .cse8) .cse5) (not (= .cse15 (+ .cse7 |c_ULTIMATE.start_main_~a~0#1| .cse8)))) (or (<= .cse16 |c_ULTIMATE.start_main_~c~0#1|) (= .cse9 (+ .cse17 .cse18 .cse10 .cse11)) (not (= (+ .cse12 .cse13 .cse17 .cse18) .cse14)) (not (= .cse15 (+ .cse7 |c_ULTIMATE.start_main_~c~0#1| .cse19 .cse20 .cse8)))) (or (not (= (+ .cse21 |c_ULTIMATE.start_main_~b~0#1| .cse22) .cse1)) (<= .cse5 (+ .cse19 .cse20)) (not (= .cse5 (+ |c_ULTIMATE.start_main_~c~0#1| .cse19 .cse20))) (= (+ .cse21 .cse2 .cse3 .cse22) .cse1)) (or (not (= (+ |c_ULTIMATE.start_main_~v~0#1| .cse23 .cse24) (+ .cse25 |c_ULTIMATE.start_main_~c~0#1| .cse19 .cse26 .cse20))) (<= .cse5 (+ .cse25 .cse19 .cse26 .cse20)) (= (+ .cse21 .cse2 .cse3 .cse27 .cse22 .cse28) .cse1) (not (= (+ .cse21 |c_ULTIMATE.start_main_~b~0#1| .cse27 .cse22 .cse28) .cse1))) (or (not (= .cse16 |c_ULTIMATE.start_main_~a~0#1|)) .cse29 (= .cse4 .cse0) .cse30) (or (= .cse9 (+ .cse7 .cse17 .cse18 .cse8)) (<= .cse31 .cse5) .cse32 (not (= (+ .cse21 .cse7 .cse22 .cse8) (+ |c_ULTIMATE.start_main_~c~0#1| .cse33 .cse34)))) (or (= .cse4 .cse31) (<= |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~c~0#1|) (not (= |c_ULTIMATE.start_main_~c~0#1| 0))) (or (= (+ .cse21 .cse35 .cse22 .cse36) .cse1) .cse32 (<= .cse5 .cse31) (not (= (+ .cse21 .cse7 |c_ULTIMATE.start_main_~b~0#1| .cse22 .cse8) .cse1))) (let ((.cse37 (* 3 .cse26)) (.cse38 (* 3 .cse25))) (or (<= (+ .cse25 .cse2 .cse3 .cse19 .cse26 .cse20) .cse5) (not (= (+ .cse25 .cse2 .cse3 |c_ULTIMATE.start_main_~c~0#1| .cse19 .cse26 .cse20) (+ |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~v~0#1| .cse23 .cse24))) (= .cse9 (+ .cse7 .cse37 .cse17 .cse18 .cse38 .cse8)) (not (= (+ .cse35 .cse37 .cse17 .cse18 .cse38 .cse36) .cse14)))) (or (= .cse4 (+ .cse2 .cse3 .cse27 .cse19 .cse20 .cse28)) .cse29 .cse30 (not (= (* 2 |c_ULTIMATE.start_main_~v~0#1|) |c_ULTIMATE.start_main_~c~0#1|))))))) is different from false [2021-11-20 06:24:25,378 WARN L227 SmtUtils]: Spent 14.67s on a formula simplification that was a NOOP. DAG size: 155 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:24:26,620 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:24:28,082 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:24:30,579 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:24:43,186 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []