./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound20.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_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/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_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/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_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/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 1fbe6596ea58bb65874b731661e9f9f596a91893af06dcebaa497157579c7f46 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:43:46,602 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:43:46,604 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:43:46,667 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:43:46,668 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:43:46,670 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:43:46,672 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:43:46,675 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:43:46,677 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:43:46,679 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:43:46,680 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:43:46,682 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:43:46,682 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:43:46,684 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:43:46,704 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:43:46,706 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:43:46,707 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:43:46,708 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:43:46,711 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:43:46,714 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:43:46,716 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:43:46,718 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:43:46,720 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:43:46,721 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:43:46,725 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:43:46,726 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:43:46,726 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:43:46,728 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:43:46,728 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:43:46,730 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:43:46,730 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:43:46,731 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:43:46,733 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:43:46,734 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:43:46,735 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:43:46,736 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:43:46,737 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:43:46,737 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:43:46,738 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:43:46,739 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:43:46,740 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:43:46,741 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:43:46,768 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:43:46,769 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:43:46,769 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:43:46,770 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:43:46,771 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:43:46,771 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:43:46,772 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:43:46,772 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:43:46,773 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:43:46,773 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:43:46,774 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:43:46,774 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:43:46,774 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:43:46,774 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:43:46,775 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:43:46,775 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:43:46,775 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:43:46,775 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:43:46,776 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:43:46,776 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:43:46,776 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:43:46,776 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:43:46,777 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:43:46,777 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:43:46,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:43:46,777 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:43:46,778 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:43:46,778 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:43:46,778 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:43:46,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:43:46,779 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:43:46,779 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:43:46,779 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:43:46,779 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:43:46,780 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_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1fbe6596ea58bb65874b731661e9f9f596a91893af06dcebaa497157579c7f46 [2021-11-20 06:43:47,046 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:43:47,080 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:43:47,083 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:43:47,084 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:43:47,085 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:43:47,087 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound20.c [2021-11-20 06:43:47,154 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/data/ded2ab6c5/61c3a08b25b644f090e5a2743eae198a/FLAGbac4b6030 [2021-11-20 06:43:47,724 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:43:47,725 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound20.c [2021-11-20 06:43:47,732 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/data/ded2ab6c5/61c3a08b25b644f090e5a2743eae198a/FLAGbac4b6030 [2021-11-20 06:43:48,106 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/data/ded2ab6c5/61c3a08b25b644f090e5a2743eae198a [2021-11-20 06:43:48,112 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:43:48,115 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:43:48,120 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:43:48,120 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:43:48,124 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:43:48,125 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:43:48" (1/1) ... [2021-11-20 06:43:48,129 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16c98356 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:43:48, skipping insertion in model container [2021-11-20 06:43:48,129 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:43:48" (1/1) ... [2021-11-20 06:43:48,139 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:43:48,162 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:43:48,309 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_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound20.c[458,471] [2021-11-20 06:43:48,325 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:43:48,334 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:43:48,347 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_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound20.c[458,471] [2021-11-20 06:43:48,355 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:43:48,370 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:43:48,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:43:48 WrapperNode [2021-11-20 06:43:48,371 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:43:48,373 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:43:48,373 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:43:48,373 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:43:48,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:43:48" (1/1) ... [2021-11-20 06:43:48,391 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:43:48" (1/1) ... [2021-11-20 06:43:48,414 INFO L137 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 38 [2021-11-20 06:43:48,416 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:43:48,417 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:43:48,417 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:43:48,418 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:43:48,428 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:43:48" (1/1) ... [2021-11-20 06:43:48,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:43:48" (1/1) ... [2021-11-20 06:43:48,445 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:43:48" (1/1) ... [2021-11-20 06:43:48,445 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:43:48" (1/1) ... [2021-11-20 06:43:48,449 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:43:48" (1/1) ... [2021-11-20 06:43:48,454 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:43:48" (1/1) ... [2021-11-20 06:43:48,455 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:43:48" (1/1) ... [2021-11-20 06:43:48,457 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:43:48,467 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:43:48,467 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:43:48,467 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:43:48,469 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:43:48" (1/1) ... [2021-11-20 06:43:48,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:43:48,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:43:48,516 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:43:48,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:43:48,573 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:43:48,574 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:43:48,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:43:48,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:43:48,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 06:43:48,574 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 06:43:48,649 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:43:48,651 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:43:48,783 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:43:48,791 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:43:48,791 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 06:43:48,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:43:48 BoogieIcfgContainer [2021-11-20 06:43:48,794 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:43:48,796 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:43:48,796 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:43:48,800 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:43:48,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:43:48" (1/3) ... [2021-11-20 06:43:48,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a1b7435 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:43:48, skipping insertion in model container [2021-11-20 06:43:48,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:43:48" (2/3) ... [2021-11-20 06:43:48,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a1b7435 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:43:48, skipping insertion in model container [2021-11-20 06:43:48,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:43:48" (3/3) ... [2021-11-20 06:43:48,804 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound20.c [2021-11-20 06:43:48,810 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:43:48,810 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:43:48,871 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:43:48,881 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 06:43:48,881 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:43:48,902 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:43:48,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 06:43:48,908 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:48,908 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:48,909 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:48,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:48,916 INFO L85 PathProgramCache]: Analyzing trace with hash -589436290, now seen corresponding path program 1 times [2021-11-20 06:43:48,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:48,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656213084] [2021-11-20 06:43:48,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:48,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:49,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:49,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:43:49,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:49,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656213084] [2021-11-20 06:43:49,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656213084] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:43:49,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:43:49,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:43:49,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701063271] [2021-11-20 06:43:49,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:43:49,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:43:49,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:49,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:43:49,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:43:49,210 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:49,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:49,244 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2021-11-20 06:43:49,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:43:49,248 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-20 06:43:49,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:49,262 INFO L225 Difference]: With dead ends: 35 [2021-11-20 06:43:49,262 INFO L226 Difference]: Without dead ends: 15 [2021-11-20 06:43:49,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:43:49,275 INFO L933 BasicCegarLoop]: 21 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, 21 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 06:43:49,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:43:49,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-20 06:43:49,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-20 06:43:49,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:43:49,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-11-20 06:43:49,348 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2021-11-20 06:43:49,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:49,349 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-11-20 06:43:49,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:49,350 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-11-20 06:43:49,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 06:43:49,352 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:49,352 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:49,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:43:49,355 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:49,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:49,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1187358532, now seen corresponding path program 1 times [2021-11-20 06:43:49,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:49,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760344756] [2021-11-20 06:43:49,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:49,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:49,401 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:43:49,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [627541068] [2021-11-20 06:43:49,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:49,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:43:49,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:43:49,410 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:43:49,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:43:49,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:49,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:43:49,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:49,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:43:49,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:43:49,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:49,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760344756] [2021-11-20 06:43:49,655 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:43:49,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627541068] [2021-11-20 06:43:49,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627541068] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:43:49,659 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:43:49,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:43:49,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396226735] [2021-11-20 06:43:49,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:43:49,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:43:49,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:49,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:43:49,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:43:49,664 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:49,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:49,769 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2021-11-20 06:43:49,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:43:49,771 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-20 06:43:49,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:49,775 INFO L225 Difference]: With dead ends: 26 [2021-11-20 06:43:49,775 INFO L226 Difference]: Without dead ends: 22 [2021-11-20 06:43:49,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 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 06:43:49,780 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:49,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 51 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:43:49,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-20 06:43:49,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-20 06:43:49,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:43:49,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-11-20 06:43:49,794 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 9 [2021-11-20 06:43:49,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:49,795 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-11-20 06:43:49,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:49,795 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-11-20 06:43:49,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 06:43:49,796 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:49,796 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:49,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:43:50,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:43:50,022 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:50,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:50,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1781398469, now seen corresponding path program 1 times [2021-11-20 06:43:50,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:50,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771979790] [2021-11-20 06:43:50,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:50,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:50,065 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:43:50,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [492085939] [2021-11-20 06:43:50,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:50,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:43:50,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:43:50,069 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:43:50,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:43:50,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:50,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 06:43:50,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:50,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:43:50,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:43:50,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:43:50,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:50,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771979790] [2021-11-20 06:43:50,497 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:43:50,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492085939] [2021-11-20 06:43:50,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492085939] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 06:43:50,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:43:50,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-11-20 06:43:50,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700148983] [2021-11-20 06:43:50,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:43:50,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:43:50,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:50,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:43:50,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:43:50,501 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:43:50,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:50,539 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-11-20 06:43:50,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:43:50,540 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-11-20 06:43:50,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:50,541 INFO L225 Difference]: With dead ends: 28 [2021-11-20 06:43:50,542 INFO L226 Difference]: Without dead ends: 23 [2021-11-20 06:43:50,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:43:50,544 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:50,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 44 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:43:50,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-20 06:43:50,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-20 06:43:50,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:43:50,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-11-20 06:43:50,553 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 16 [2021-11-20 06:43:50,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:50,553 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-11-20 06:43:50,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:43:50,554 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-11-20 06:43:50,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 06:43:50,555 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:50,556 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:50,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:43:50,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:43:50,779 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:50,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:50,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1711372296, now seen corresponding path program 1 times [2021-11-20 06:43:50,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:50,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697859965] [2021-11-20 06:43:50,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:50,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:50,790 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:43:50,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [569675851] [2021-11-20 06:43:50,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:50,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:43:50,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:43:50,792 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:43:50,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:43:50,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:50,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 06:43:50,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:51,133 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:43:51,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:43:51,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:51,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697859965] [2021-11-20 06:43:51,531 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:43:51,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569675851] [2021-11-20 06:43:51,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569675851] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:43:51,532 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:43:51,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-20 06:43:51,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008231421] [2021-11-20 06:43:51,532 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:43:51,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:43:51,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:51,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:43:51,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:43:51,534 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:43:51,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:51,639 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-11-20 06:43:51,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:43:51,642 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-11-20 06:43:51,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:51,643 INFO L225 Difference]: With dead ends: 31 [2021-11-20 06:43:51,644 INFO L226 Difference]: Without dead ends: 26 [2021-11-20 06:43:51,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:43:51,651 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 2 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:51,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 81 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:43:51,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-20 06:43:51,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-20 06:43:51,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:43:51,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-11-20 06:43:51,671 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2021-11-20 06:43:51,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:51,672 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-11-20 06:43:51,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:43:51,672 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-11-20 06:43:51,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-20 06:43:51,675 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:51,677 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:51,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-20 06:43:51,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:43:51,898 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:51,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:51,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1075497887, now seen corresponding path program 2 times [2021-11-20 06:43:51,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:51,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919205096] [2021-11-20 06:43:51,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:51,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:51,909 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:43:51,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1307109531] [2021-11-20 06:43:51,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:43:51,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:43:51,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:43:51,911 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:43:51,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:43:51,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:43:51,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:43:51,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 06:43:51,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:52,273 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:43:52,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:43:52,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:52,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919205096] [2021-11-20 06:43:52,777 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:43:52,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307109531] [2021-11-20 06:43:52,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307109531] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:43:52,777 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:43:52,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-20 06:43:52,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510691012] [2021-11-20 06:43:52,778 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:43:52,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:43:52,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:52,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:43:52,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:43:52,780 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:43:52,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:52,888 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-11-20 06:43:52,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:43:52,889 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2021-11-20 06:43:52,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:52,890 INFO L225 Difference]: With dead ends: 34 [2021-11-20 06:43:52,890 INFO L226 Difference]: Without dead ends: 29 [2021-11-20 06:43:52,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:43:52,892 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 2 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:52,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 109 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:43:52,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-20 06:43:52,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-20 06:43:52,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 06:43:52,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-11-20 06:43:52,900 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2021-11-20 06:43:52,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:52,901 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-11-20 06:43:52,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:43:52,901 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-11-20 06:43:52,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-20 06:43:52,903 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:52,903 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:52,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:43:53,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:43:53,117 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:53,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:53,118 INFO L85 PathProgramCache]: Analyzing trace with hash 817917912, now seen corresponding path program 3 times [2021-11-20 06:43:53,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:53,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662633407] [2021-11-20 06:43:53,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:53,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:53,129 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:43:53,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [66600852] [2021-11-20 06:43:53,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:43:53,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:43:53,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:43:53,139 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:43:53,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:43:53,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-20 06:43:53,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:43:53,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 06:43:53,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:53,541 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 06:43:53,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:43:53,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:53,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662633407] [2021-11-20 06:43:53,821 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:43:53,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66600852] [2021-11-20 06:43:53,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66600852] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:43:53,822 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:43:53,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-20 06:43:53,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979120629] [2021-11-20 06:43:53,823 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:43:53,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:43:53,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:53,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:43:53,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:43:53,825 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 06:43:53,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:53,942 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2021-11-20 06:43:53,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:43:53,943 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2021-11-20 06:43:53,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:53,944 INFO L225 Difference]: With dead ends: 37 [2021-11-20 06:43:53,945 INFO L226 Difference]: Without dead ends: 32 [2021-11-20 06:43:53,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:43:53,946 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:53,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 141 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:43:53,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-20 06:43:53,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-20 06:43:53,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 06:43:53,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-11-20 06:43:53,960 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 36 [2021-11-20 06:43:53,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:53,961 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-11-20 06:43:53,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 06:43:53,961 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-11-20 06:43:53,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 06:43:53,966 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:53,966 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:54,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:43:54,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-20 06:43:54,179 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:54,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:54,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1384689793, now seen corresponding path program 4 times [2021-11-20 06:43:54,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:54,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910238178] [2021-11-20 06:43:54,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:54,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:54,189 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:43:54,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1688931693] [2021-11-20 06:43:54,190 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:43:54,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:43:54,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:43:54,191 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:43:54,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:43:54,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:43:54,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:43:54,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-20 06:43:54,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:54,596 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-20 06:43:54,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:43:54,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:54,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910238178] [2021-11-20 06:43:54,851 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:43:54,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688931693] [2021-11-20 06:43:54,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688931693] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:43:54,851 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:43:54,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-20 06:43:54,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950857850] [2021-11-20 06:43:54,853 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:43:54,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:43:54,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:54,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:43:54,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:43:54,855 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 06:43:55,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:55,020 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-11-20 06:43:55,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:43:55,021 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 43 [2021-11-20 06:43:55,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:55,023 INFO L225 Difference]: With dead ends: 40 [2021-11-20 06:43:55,023 INFO L226 Difference]: Without dead ends: 35 [2021-11-20 06:43:55,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:43:55,025 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:55,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 177 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:43:55,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-20 06:43:55,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-11-20 06:43:55,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 06:43:55,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-11-20 06:43:55,036 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 43 [2021-11-20 06:43:55,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:55,037 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-11-20 06:43:55,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 06:43:55,038 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-11-20 06:43:55,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-20 06:43:55,039 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:55,039 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:55,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:43:55,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:43:55,254 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:55,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:55,255 INFO L85 PathProgramCache]: Analyzing trace with hash -23130184, now seen corresponding path program 5 times [2021-11-20 06:43:55,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:55,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15963114] [2021-11-20 06:43:55,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:55,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:55,266 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:43:55,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1606999831] [2021-11-20 06:43:55,266 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:43:55,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:43:55,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:43:55,268 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:43:55,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 06:43:55,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-20 06:43:55,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:43:55,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-20 06:43:55,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:55,797 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-20 06:43:55,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:43:56,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:56,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15963114] [2021-11-20 06:43:56,471 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:43:56,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606999831] [2021-11-20 06:43:56,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606999831] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:43:56,472 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:43:56,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-20 06:43:56,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655586471] [2021-11-20 06:43:56,473 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:43:56,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 06:43:56,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:56,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 06:43:56,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:43:56,474 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 06:43:56,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:56,664 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2021-11-20 06:43:56,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:43:56,665 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 50 [2021-11-20 06:43:56,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:56,666 INFO L225 Difference]: With dead ends: 43 [2021-11-20 06:43:56,666 INFO L226 Difference]: Without dead ends: 38 [2021-11-20 06:43:56,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-11-20 06:43:56,668 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 2 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:56,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 217 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:43:56,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-20 06:43:56,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-20 06:43:56,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-20 06:43:56,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2021-11-20 06:43:56,678 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 50 [2021-11-20 06:43:56,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:56,678 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2021-11-20 06:43:56,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 06:43:56,679 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2021-11-20 06:43:56,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-20 06:43:56,680 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:56,680 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:56,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:43:56,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:43:56,901 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:56,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:56,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1898941279, now seen corresponding path program 6 times [2021-11-20 06:43:56,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:56,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55844581] [2021-11-20 06:43:56,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:56,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:56,911 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:43:56,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [173317483] [2021-11-20 06:43:56,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:43:56,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:43:56,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:43:56,913 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:43:56,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 06:43:57,098 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-20 06:43:57,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:43:57,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-20 06:43:57,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:57,515 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 63 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-20 06:43:57,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:43:58,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:58,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55844581] [2021-11-20 06:43:58,564 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:43:58,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173317483] [2021-11-20 06:43:58,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173317483] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:43:58,565 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:43:58,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-20 06:43:58,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134146874] [2021-11-20 06:43:58,565 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:43:58,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 06:43:58,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:58,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 06:43:58,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-11-20 06:43:58,567 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-20 06:43:58,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:58,803 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2021-11-20 06:43:58,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:43:58,804 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 57 [2021-11-20 06:43:58,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:58,805 INFO L225 Difference]: With dead ends: 46 [2021-11-20 06:43:58,805 INFO L226 Difference]: Without dead ends: 41 [2021-11-20 06:43:58,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-11-20 06:43:58,807 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:58,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 261 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:43:58,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-20 06:43:58,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-11-20 06:43:58,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 9 states have call successors, (9), 3 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 06:43:58,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-11-20 06:43:58,816 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 57 [2021-11-20 06:43:58,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:58,817 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-11-20 06:43:58,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-20 06:43:58,817 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-11-20 06:43:58,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-20 06:43:58,819 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:58,819 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:58,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 06:43:59,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:43:59,046 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:59,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:59,047 INFO L85 PathProgramCache]: Analyzing trace with hash 385378200, now seen corresponding path program 7 times [2021-11-20 06:43:59,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:59,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813067413] [2021-11-20 06:43:59,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:59,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:59,056 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:43:59,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1544577010] [2021-11-20 06:43:59,056 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 06:43:59,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:43:59,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:43:59,060 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:43:59,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 06:43:59,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:59,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-20 06:43:59,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:59,910 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 16 proven. 84 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-20 06:43:59,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:44:00,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:00,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813067413] [2021-11-20 06:44:00,125 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:44:00,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544577010] [2021-11-20 06:44:00,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544577010] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:44:00,126 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:44:00,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-20 06:44:00,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858020540] [2021-11-20 06:44:00,126 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:44:00,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 06:44:00,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:00,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 06:44:00,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:44:00,128 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 06:44:00,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:00,383 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2021-11-20 06:44:00,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 06:44:00,384 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 64 [2021-11-20 06:44:00,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:00,385 INFO L225 Difference]: With dead ends: 49 [2021-11-20 06:44:00,385 INFO L226 Difference]: Without dead ends: 44 [2021-11-20 06:44:00,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:44:00,386 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 2 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:00,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 309 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:44:00,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-20 06:44:00,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-11-20 06:44:00,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 10 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 06:44:00,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2021-11-20 06:44:00,396 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 64 [2021-11-20 06:44:00,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:00,396 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2021-11-20 06:44:00,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 06:44:00,397 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2021-11-20 06:44:00,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-20 06:44:00,398 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:00,398 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:44:00,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 06:44:00,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 06:44:00,605 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:44:00,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:00,606 INFO L85 PathProgramCache]: Analyzing trace with hash 2073985217, now seen corresponding path program 8 times [2021-11-20 06:44:00,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:00,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937949845] [2021-11-20 06:44:00,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:00,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:00,615 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:44:00,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [883264286] [2021-11-20 06:44:00,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:44:00,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:44:00,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:44:00,617 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:44:00,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 06:44:01,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:44:01,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:44:01,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-20 06:44:01,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:44:01,595 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 18 proven. 108 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-20 06:44:01,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:44:01,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:01,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937949845] [2021-11-20 06:44:01,848 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:44:01,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883264286] [2021-11-20 06:44:01,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883264286] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:44:01,849 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:44:01,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-20 06:44:01,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009541215] [2021-11-20 06:44:01,849 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:44:01,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 06:44:01,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:01,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 06:44:01,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:44:01,851 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 06:44:02,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:02,137 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2021-11-20 06:44:02,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:44:02,137 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 71 [2021-11-20 06:44:02,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:02,139 INFO L225 Difference]: With dead ends: 52 [2021-11-20 06:44:02,139 INFO L226 Difference]: Without dead ends: 47 [2021-11-20 06:44:02,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:44:02,140 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 2 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:02,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 361 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:44:02,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-20 06:44:02,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-11-20 06:44:02,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 11 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-20 06:44:02,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-11-20 06:44:02,149 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 71 [2021-11-20 06:44:02,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:02,149 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-11-20 06:44:02,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 06:44:02,150 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-11-20 06:44:02,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-20 06:44:02,151 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:02,151 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:44:02,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 06:44:02,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:44:02,357 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:44:02,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:02,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1353348984, now seen corresponding path program 9 times [2021-11-20 06:44:02,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:02,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669890169] [2021-11-20 06:44:02,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:02,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:02,365 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:44:02,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1657059748] [2021-11-20 06:44:02,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:44:02,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:44:02,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:44:02,367 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:44:02,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 06:44:03,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-20 06:44:03,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:44:03,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-20 06:44:03,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:44:03,764 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 20 proven. 135 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-20 06:44:03,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:44:03,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:03,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669890169] [2021-11-20 06:44:03,972 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:44:03,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657059748] [2021-11-20 06:44:03,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657059748] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:44:03,972 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:44:03,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-20 06:44:03,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595642870] [2021-11-20 06:44:03,973 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:44:03,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 06:44:03,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:03,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 06:44:03,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:44:03,976 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-20 06:44:04,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:04,295 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2021-11-20 06:44:04,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 06:44:04,296 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 78 [2021-11-20 06:44:04,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:04,298 INFO L225 Difference]: With dead ends: 55 [2021-11-20 06:44:04,298 INFO L226 Difference]: Without dead ends: 50 [2021-11-20 06:44:04,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-11-20 06:44:04,299 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 2 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:04,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 417 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:44:04,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-20 06:44:04,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-11-20 06:44:04,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 12 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-20 06:44:04,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2021-11-20 06:44:04,312 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 78 [2021-11-20 06:44:04,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:04,312 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2021-11-20 06:44:04,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-20 06:44:04,313 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2021-11-20 06:44:04,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-20 06:44:04,314 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:04,315 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:44:04,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 06:44:04,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:44:04,522 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:44:04,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:04,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1817498849, now seen corresponding path program 10 times [2021-11-20 06:44:04,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:04,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102960993] [2021-11-20 06:44:04,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:04,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:04,532 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:44:04,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1555465897] [2021-11-20 06:44:04,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:44:04,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:44:04,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:44:04,535 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:44:04,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 06:44:04,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:44:04,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:44:04,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-20 06:44:04,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:44:05,368 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 22 proven. 165 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-11-20 06:44:05,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:44:05,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:05,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102960993] [2021-11-20 06:44:05,579 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:44:05,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555465897] [2021-11-20 06:44:05,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555465897] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:44:05,579 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:44:05,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-20 06:44:05,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094113332] [2021-11-20 06:44:05,580 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:44:05,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 06:44:05,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:05,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 06:44:05,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:44:05,583 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-20 06:44:05,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:05,954 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2021-11-20 06:44:05,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 06:44:05,955 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 85 [2021-11-20 06:44:05,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:05,956 INFO L225 Difference]: With dead ends: 58 [2021-11-20 06:44:05,956 INFO L226 Difference]: Without dead ends: 53 [2021-11-20 06:44:05,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:44:05,958 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 2 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:05,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 477 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:44:05,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-20 06:44:05,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-11-20 06:44:05,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-20 06:44:05,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2021-11-20 06:44:05,968 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 85 [2021-11-20 06:44:05,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:05,968 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2021-11-20 06:44:05,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-20 06:44:05,969 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2021-11-20 06:44:05,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-20 06:44:05,970 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:05,970 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:44:05,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 06:44:06,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:44:06,176 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:44:06,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:06,176 INFO L85 PathProgramCache]: Analyzing trace with hash 638795608, now seen corresponding path program 11 times [2021-11-20 06:44:06,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:06,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470983955] [2021-11-20 06:44:06,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:06,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:06,184 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:44:06,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [416365010] [2021-11-20 06:44:06,184 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:44:06,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:44:06,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:44:06,186 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:44:06,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 06:44:07,267 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-20 06:44:07,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:44:07,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-20 06:44:07,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:44:07,803 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 24 proven. 198 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-11-20 06:44:07,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:44:08,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:08,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470983955] [2021-11-20 06:44:08,017 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:44:08,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416365010] [2021-11-20 06:44:08,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416365010] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:44:08,017 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:44:08,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-20 06:44:08,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56077598] [2021-11-20 06:44:08,018 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:44:08,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 06:44:08,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:08,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 06:44:08,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-11-20 06:44:08,020 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 13 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-20 06:44:08,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:08,399 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2021-11-20 06:44:08,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 06:44:08,406 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 13 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 92 [2021-11-20 06:44:08,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:08,407 INFO L225 Difference]: With dead ends: 61 [2021-11-20 06:44:08,407 INFO L226 Difference]: Without dead ends: 56 [2021-11-20 06:44:08,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-11-20 06:44:08,409 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 2 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:08,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 541 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:44:08,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-20 06:44:08,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-11-20 06:44:08,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 states have internal predecessors, (40), 14 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-20 06:44:08,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2021-11-20 06:44:08,419 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 92 [2021-11-20 06:44:08,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:08,420 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2021-11-20 06:44:08,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 13 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-20 06:44:08,420 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2021-11-20 06:44:08,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-20 06:44:08,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:08,422 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:44:08,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 06:44:08,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 06:44:08,628 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:44:08,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:08,628 INFO L85 PathProgramCache]: Analyzing trace with hash 550859009, now seen corresponding path program 12 times [2021-11-20 06:44:08,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:08,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991371881] [2021-11-20 06:44:08,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:08,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:08,648 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:44:08,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [343378501] [2021-11-20 06:44:08,648 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:44:08,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:44:08,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:44:08,650 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:44:08,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 06:44:09,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-20 06:44:09,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:44:09,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-20 06:44:09,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:44:10,213 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 26 proven. 234 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-11-20 06:44:10,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:44:10,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:10,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991371881] [2021-11-20 06:44:10,465 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:44:10,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343378501] [2021-11-20 06:44:10,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343378501] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:44:10,465 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:44:10,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-20 06:44:10,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538845755] [2021-11-20 06:44:10,466 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:44:10,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 06:44:10,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:10,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 06:44:10,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:44:10,468 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 14 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-20 06:44:10,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:10,907 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2021-11-20 06:44:10,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 06:44:10,907 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 14 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 99 [2021-11-20 06:44:10,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:10,909 INFO L225 Difference]: With dead ends: 64 [2021-11-20 06:44:10,909 INFO L226 Difference]: Without dead ends: 59 [2021-11-20 06:44:10,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-11-20 06:44:10,911 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 2 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:10,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 609 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:44:10,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-20 06:44:10,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-11-20 06:44:10,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.024390243902439) internal successors, (42), 41 states have internal predecessors, (42), 15 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-20 06:44:10,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2021-11-20 06:44:10,922 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 99 [2021-11-20 06:44:10,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:10,923 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2021-11-20 06:44:10,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 14 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-20 06:44:10,923 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2021-11-20 06:44:10,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-20 06:44:10,925 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:10,925 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:44:10,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 06:44:11,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-20 06:44:11,132 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:44:11,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:11,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1794064584, now seen corresponding path program 13 times [2021-11-20 06:44:11,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:11,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280869238] [2021-11-20 06:44:11,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:11,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:11,140 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:44:11,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1304078312] [2021-11-20 06:44:11,140 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 06:44:11,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:44:11,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:44:11,150 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:44:11,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 06:44:12,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:12,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-20 06:44:12,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:44:13,529 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 28 proven. 273 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-20 06:44:13,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:44:13,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:13,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280869238] [2021-11-20 06:44:13,713 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:44:13,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304078312] [2021-11-20 06:44:13,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304078312] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:44:13,714 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:44:13,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-20 06:44:13,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946785228] [2021-11-20 06:44:13,714 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:44:13,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 06:44:13,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:13,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 06:44:13,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-11-20 06:44:13,715 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-20 06:44:14,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:14,268 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2021-11-20 06:44:14,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 06:44:14,269 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 106 [2021-11-20 06:44:14,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:14,270 INFO L225 Difference]: With dead ends: 67 [2021-11-20 06:44:14,271 INFO L226 Difference]: Without dead ends: 62 [2021-11-20 06:44:14,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-11-20 06:44:14,272 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 2 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:14,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 681 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 06:44:14,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-20 06:44:14,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-11-20 06:44:14,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 43 states have internal predecessors, (44), 16 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-20 06:44:14,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2021-11-20 06:44:14,283 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 106 [2021-11-20 06:44:14,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:14,283 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2021-11-20 06:44:14,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-20 06:44:14,284 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2021-11-20 06:44:14,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-20 06:44:14,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:14,285 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:44:14,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 06:44:14,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 06:44:14,493 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:44:14,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:14,493 INFO L85 PathProgramCache]: Analyzing trace with hash -444443359, now seen corresponding path program 14 times [2021-11-20 06:44:14,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:14,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902277912] [2021-11-20 06:44:14,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:14,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:14,504 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:44:14,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1499144962] [2021-11-20 06:44:14,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:44:14,504 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:44:14,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:44:14,514 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:44:14,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 06:44:16,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:44:16,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:44:16,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-20 06:44:16,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:44:16,877 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 30 proven. 315 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-11-20 06:44:16,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:44:17,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:17,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902277912] [2021-11-20 06:44:17,174 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:44:17,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499144962] [2021-11-20 06:44:17,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499144962] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:44:17,174 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:44:17,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-20 06:44:17,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601302036] [2021-11-20 06:44:17,174 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:44:17,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 06:44:17,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:17,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 06:44:17,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-11-20 06:44:17,176 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 16 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-20 06:44:17,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:17,622 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2021-11-20 06:44:17,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 06:44:17,622 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 16 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 113 [2021-11-20 06:44:17,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:17,624 INFO L225 Difference]: With dead ends: 70 [2021-11-20 06:44:17,624 INFO L226 Difference]: Without dead ends: 65 [2021-11-20 06:44:17,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:44:17,625 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 2 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:17,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 757 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:44:17,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-20 06:44:17,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-11-20 06:44:17,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 45 states have internal predecessors, (46), 17 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 06:44:17,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 79 transitions. [2021-11-20 06:44:17,635 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 79 transitions. Word has length 113 [2021-11-20 06:44:17,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:17,636 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 79 transitions. [2021-11-20 06:44:17,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 16 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-20 06:44:17,636 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 79 transitions. [2021-11-20 06:44:17,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-20 06:44:17,638 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:17,638 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:44:17,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 06:44:17,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 06:44:17,842 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:44:17,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:17,843 INFO L85 PathProgramCache]: Analyzing trace with hash -16713960, now seen corresponding path program 15 times [2021-11-20 06:44:17,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:17,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753672259] [2021-11-20 06:44:17,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:17,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:17,851 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:44:17,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1615736455] [2021-11-20 06:44:17,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:44:17,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:44:17,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:44:17,853 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:44:17,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 06:44:18,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-20 06:44:18,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:44:18,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-20 06:44:18,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:44:19,430 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 32 proven. 360 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2021-11-20 06:44:19,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:44:19,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:19,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753672259] [2021-11-20 06:44:19,639 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:44:19,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615736455] [2021-11-20 06:44:19,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615736455] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:44:19,640 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:44:19,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-11-20 06:44:19,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143064639] [2021-11-20 06:44:19,640 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:44:19,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 06:44:19,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:19,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 06:44:19,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-11-20 06:44:19,641 INFO L87 Difference]: Start difference. First operand 65 states and 79 transitions. Second operand has 21 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 17 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 06:44:20,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:20,208 INFO L93 Difference]: Finished difference Result 73 states and 88 transitions. [2021-11-20 06:44:20,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-20 06:44:20,208 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 17 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 120 [2021-11-20 06:44:20,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:20,209 INFO L225 Difference]: With dead ends: 73 [2021-11-20 06:44:20,209 INFO L226 Difference]: Without dead ends: 68 [2021-11-20 06:44:20,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-11-20 06:44:20,210 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 2 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:20,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 837 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 06:44:20,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-20 06:44:20,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-11-20 06:44:20,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 47 states have internal predecessors, (48), 18 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-20 06:44:20,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2021-11-20 06:44:20,220 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 120 [2021-11-20 06:44:20,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:20,221 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2021-11-20 06:44:20,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 17 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 06:44:20,221 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2021-11-20 06:44:20,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-20 06:44:20,223 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:20,223 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:44:20,229 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-11-20 06:44:20,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 06:44:20,429 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:44:20,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:20,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1287814847, now seen corresponding path program 16 times [2021-11-20 06:44:20,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:20,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737594859] [2021-11-20 06:44:20,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:20,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:20,438 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:44:20,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1656694896] [2021-11-20 06:44:20,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:44:20,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:44:20,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:44:20,440 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:44:20,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 06:44:21,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:44:21,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:44:21,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-20 06:44:21,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:44:22,696 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 34 proven. 408 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2021-11-20 06:44:22,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:44:22,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:22,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737594859] [2021-11-20 06:44:22,995 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:44:22,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656694896] [2021-11-20 06:44:22,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656694896] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:44:22,996 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:44:22,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-11-20 06:44:22,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739787416] [2021-11-20 06:44:22,996 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:44:22,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 06:44:22,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:22,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 06:44:22,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:44:22,999 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 18 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-20 06:44:23,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:23,553 INFO L93 Difference]: Finished difference Result 76 states and 92 transitions. [2021-11-20 06:44:23,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 06:44:23,554 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 18 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 127 [2021-11-20 06:44:23,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:23,555 INFO L225 Difference]: With dead ends: 76 [2021-11-20 06:44:23,555 INFO L226 Difference]: Without dead ends: 71 [2021-11-20 06:44:23,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2021-11-20 06:44:23,557 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 2 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:23,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 921 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 06:44:23,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-20 06:44:23,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-11-20 06:44:23,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 49 states have internal predecessors, (50), 19 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-20 06:44:23,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2021-11-20 06:44:23,567 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 127 [2021-11-20 06:44:23,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:23,568 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2021-11-20 06:44:23,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 18 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-20 06:44:23,568 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2021-11-20 06:44:23,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-20 06:44:23,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:23,570 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:44:23,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-20 06:44:23,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:44:23,771 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:44:23,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:23,772 INFO L85 PathProgramCache]: Analyzing trace with hash 146925304, now seen corresponding path program 17 times [2021-11-20 06:44:23,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:23,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491168313] [2021-11-20 06:44:23,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:23,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:23,780 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:44:23,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1857943682] [2021-11-20 06:44:23,780 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:44:23,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:44:23,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:44:23,786 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:44:23,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 06:44:25,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-11-20 06:44:25,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:44:25,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-20 06:44:25,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:44:26,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 36 proven. 459 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2021-11-20 06:44:26,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:44:26,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:26,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491168313] [2021-11-20 06:44:26,545 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:44:26,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857943682] [2021-11-20 06:44:26,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857943682] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:44:26,546 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:44:26,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-11-20 06:44:26,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36174488] [2021-11-20 06:44:26,546 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:44:26,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 06:44:26,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:26,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 06:44:26,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-11-20 06:44:26,548 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 19 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-20 06:44:27,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:27,209 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2021-11-20 06:44:27,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 06:44:27,209 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 19 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 134 [2021-11-20 06:44:27,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:27,210 INFO L225 Difference]: With dead ends: 79 [2021-11-20 06:44:27,210 INFO L226 Difference]: Without dead ends: 74 [2021-11-20 06:44:27,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-11-20 06:44:27,212 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 2 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1009 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:27,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1009 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 805 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 06:44:27,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-20 06:44:27,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-11-20 06:44:27,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 51 states have internal predecessors, (52), 20 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-11-20 06:44:27,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2021-11-20 06:44:27,224 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 134 [2021-11-20 06:44:27,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:27,225 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2021-11-20 06:44:27,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 19 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-20 06:44:27,225 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2021-11-20 06:44:27,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-20 06:44:27,227 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:27,228 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:44:27,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-20 06:44:27,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:44:27,435 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:44:27,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:27,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1332278625, now seen corresponding path program 18 times [2021-11-20 06:44:27,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:27,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680274221] [2021-11-20 06:44:27,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:27,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:27,443 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:44:27,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [838597478] [2021-11-20 06:44:27,443 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:44:27,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:44:27,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:44:27,445 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:44:27,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-20 06:44:36,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-11-20 06:44:36,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:44:36,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-20 06:44:36,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:44:37,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 38 proven. 513 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2021-11-20 06:44:37,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:44:37,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:37,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680274221] [2021-11-20 06:44:37,525 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:44:37,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838597478] [2021-11-20 06:44:37,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838597478] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:44:37,525 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:44:37,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-11-20 06:44:37,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539183839] [2021-11-20 06:44:37,526 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:44:37,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 06:44:37,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:37,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 06:44:37,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-11-20 06:44:37,528 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 20 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-11-20 06:44:38,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:38,271 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2021-11-20 06:44:38,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-20 06:44:38,271 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 20 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 141 [2021-11-20 06:44:38,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:38,273 INFO L225 Difference]: With dead ends: 82 [2021-11-20 06:44:38,273 INFO L226 Difference]: Without dead ends: 77 [2021-11-20 06:44:38,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2021-11-20 06:44:38,275 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 2 mSDsluCounter, 1033 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1101 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:38,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1101 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 06:44:38,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-20 06:44:38,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-11-20 06:44:38,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 53 states have internal predecessors, (54), 21 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-20 06:44:38,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 95 transitions. [2021-11-20 06:44:38,287 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 95 transitions. Word has length 141 [2021-11-20 06:44:38,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:38,287 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 95 transitions. [2021-11-20 06:44:38,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 20 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-11-20 06:44:38,288 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 95 transitions. [2021-11-20 06:44:38,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-20 06:44:38,290 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:38,290 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:44:38,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-20 06:44:38,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:44:38,503 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:44:38,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:38,504 INFO L85 PathProgramCache]: Analyzing trace with hash 2058456792, now seen corresponding path program 19 times [2021-11-20 06:44:38,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:38,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520177809] [2021-11-20 06:44:38,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:38,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:38,517 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:44:38,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [683335498] [2021-11-20 06:44:38,518 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 06:44:38,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:44:38,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:44:38,519 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:44:38,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-20 06:44:40,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:40,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-20 06:44:40,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:44:41,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 40 proven. 570 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2021-11-20 06:44:41,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:44:41,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:41,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520177809] [2021-11-20 06:44:41,303 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:44:41,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683335498] [2021-11-20 06:44:41,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683335498] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:44:41,304 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:44:41,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-11-20 06:44:41,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405138658] [2021-11-20 06:44:41,304 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:44:41,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-20 06:44:41,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:41,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-20 06:44:41,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2021-11-20 06:44:41,306 INFO L87 Difference]: Start difference. First operand 77 states and 95 transitions. Second operand has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 21 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-20 06:44:42,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:42,023 INFO L93 Difference]: Finished difference Result 85 states and 104 transitions. [2021-11-20 06:44:42,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-20 06:44:42,034 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 21 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 148 [2021-11-20 06:44:42,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:42,036 INFO L225 Difference]: With dead ends: 85 [2021-11-20 06:44:42,036 INFO L226 Difference]: Without dead ends: 80 [2021-11-20 06:44:42,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-11-20 06:44:42,037 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 2 mSDsluCounter, 1126 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1197 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:42,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1197 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 06:44:42,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-20 06:44:42,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-11-20 06:44:42,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 55 states have (on average 1.018181818181818) internal successors, (56), 55 states have internal predecessors, (56), 22 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-20 06:44:42,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 99 transitions. [2021-11-20 06:44:42,050 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 99 transitions. Word has length 148 [2021-11-20 06:44:42,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:42,051 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 99 transitions. [2021-11-20 06:44:42,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 21 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-20 06:44:42,051 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 99 transitions. [2021-11-20 06:44:42,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-20 06:44:42,054 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:42,054 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:44:42,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-20 06:44:42,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-20 06:44:42,263 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:44:42,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:42,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1810280833, now seen corresponding path program 20 times [2021-11-20 06:44:42,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:42,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632563834] [2021-11-20 06:44:42,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:42,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:42,272 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:44:42,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1569517037] [2021-11-20 06:44:42,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:44:42,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:44:42,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:44:42,274 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:44:42,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-20 06:44:43,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:44:43,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:44:43,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-20 06:44:43,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:44:45,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 201 proven. 633 refuted. 0 times theorem prover too weak. 678 trivial. 0 not checked. [2021-11-20 06:44:45,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:44:49,432 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (* (- 13) |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (.cse2 (* (- 1) |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (.cse3 (* (- 6) |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (or (< (+ (* 3 .cse0) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) |c_ULTIMATE.start_main_~x~0#1| 1) (div (+ .cse1 .cse2 (- 4) .cse3) (- 4))) (not (= (mod (+ .cse1 .cse2 .cse3) (- 4)) 0)) (= (+ |c_ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|)) (+ (* 2 |c_ULTIMATE.start_main_~y~0#1|) .cse0 1)) (<= |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~c~0#1|))) is different from false [2021-11-20 06:44:53,715 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* (- 13) |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (.cse1 (* (- 1) |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (.cse2 (* (- 6) |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (.cse3 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (or (not (= (mod (+ .cse0 .cse1 .cse2) (- 4)) 0)) (<= |c_ULTIMATE.start_main_~k~0#1| (+ |c_ULTIMATE.start_main_~c~0#1| 1)) (= (+ (* 2 |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|)) (+ 4 (* 4 |c_ULTIMATE.start_main_~y~0#1|) .cse3)) (< (div (+ .cse0 .cse1 (- 4) .cse2) (- 4)) (+ (* 3 .cse3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) |c_ULTIMATE.start_main_~x~0#1| 1)))) is different from false [2021-11-20 06:44:57,791 WARN L838 $PredicateComparison]: unable to prove that (or (<= |c_ULTIMATE.start_main_~k~0#1| (+ |c_ULTIMATE.start_main_~c~0#1| 1)) (not (= (mod (+ (* (- 1) |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* (- 1) |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* (- 2) |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (- 4)) 0)) (= (+ (* 2 |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|)) (+ 4 (* 4 |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)))) is different from false [2021-11-20 06:45:03,907 WARN L838 $PredicateComparison]: unable to prove that (or (not (= (mod (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 1))) (+ (* (- 2) .cse0 .cse0 .cse0) (* (- 1) .cse0 .cse0) (* (- 1) .cse0 .cse0 .cse0 .cse0))) (- 4)) 0)) (= (+ (* 6 |c_ULTIMATE.start_main_~y~0#1|) 9 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (+ (* 3 |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|))) (<= |c_ULTIMATE.start_main_~k~0#1| (+ 2 |c_ULTIMATE.start_main_~c~0#1|))) is different from false [2021-11-20 06:45:11,964 WARN L838 $PredicateComparison]: unable to prove that (or (not (= (mod (let ((.cse0 (+ 2 |c_ULTIMATE.start_main_~y~0#1|))) (+ (* (- 1) .cse0 .cse0) (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 2) .cse0 .cse0 .cse0))) (- 4)) 0)) (= (+ (* 4 |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|)) (+ (* 8 |c_ULTIMATE.start_main_~y~0#1|) 16 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (<= |c_ULTIMATE.start_main_~k~0#1| (+ 3 |c_ULTIMATE.start_main_~c~0#1|))) is different from false [2021-11-20 06:45:20,223 WARN L838 $PredicateComparison]: unable to prove that (or (= (+ (* 5 |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|)) (+ (* 10 |c_ULTIMATE.start_main_~y~0#1|) 25 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (<= |c_ULTIMATE.start_main_~k~0#1| (+ |c_ULTIMATE.start_main_~c~0#1| 4)) (not (= (mod (let ((.cse0 (+ 3 |c_ULTIMATE.start_main_~y~0#1|))) (+ (* (- 2) .cse0 .cse0 .cse0) (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 1) .cse0 .cse0))) (- 4)) 0))) is different from false [2021-11-20 06:45:28,284 WARN L838 $PredicateComparison]: unable to prove that (or (not (= (mod (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 4))) (+ (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 2) .cse0 .cse0 .cse0) (* (- 1) .cse0 .cse0))) (- 4)) 0)) (<= |c_ULTIMATE.start_main_~k~0#1| (+ 5 |c_ULTIMATE.start_main_~c~0#1|)) (= (+ 36 (* 12 |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (+ (* 6 |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|)))) is different from false [2021-11-20 06:45:39,152 WARN L838 $PredicateComparison]: unable to prove that (or (= (+ (* 7 |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|)) (+ 49 (* 14 |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (not (= (mod (let ((.cse0 (+ 5 |c_ULTIMATE.start_main_~y~0#1|))) (+ (* (- 1) .cse0 .cse0) (* (- 2) .cse0 .cse0 .cse0) (* (- 1) .cse0 .cse0 .cse0 .cse0))) (- 4)) 0)) (<= |c_ULTIMATE.start_main_~k~0#1| (+ 6 |c_ULTIMATE.start_main_~c~0#1|))) is different from false [2021-11-20 06:45:47,242 WARN L838 $PredicateComparison]: unable to prove that (or (= (+ 64 (* 16 |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (+ (* 8 |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|))) (<= |c_ULTIMATE.start_main_~k~0#1| (+ 7 |c_ULTIMATE.start_main_~c~0#1|)) (not (= 0 (mod (let ((.cse0 (+ 6 |c_ULTIMATE.start_main_~y~0#1|))) (+ (* (- 1) .cse0 .cse0) (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 2) .cse0 .cse0 .cse0))) (- 4))))) is different from false [2021-11-20 06:45:55,305 WARN L838 $PredicateComparison]: unable to prove that (or (not (= (mod (let ((.cse0 (+ 7 |c_ULTIMATE.start_main_~y~0#1|))) (+ (* (- 1) .cse0 .cse0) (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 2) .cse0 .cse0 .cse0))) (- 4)) 0)) (= (+ (* 18 |c_ULTIMATE.start_main_~y~0#1|) 81 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (+ (* 9 |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|))) (<= |c_ULTIMATE.start_main_~k~0#1| (+ |c_ULTIMATE.start_main_~c~0#1| 8))) is different from false [2021-11-20 06:46:03,811 WARN L838 $PredicateComparison]: unable to prove that (or (not (= (mod (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 8))) (+ (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 1) .cse0 .cse0) (* (- 2) .cse0 .cse0 .cse0))) (- 4)) 0)) (= (+ (* 10 |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|)) (+ (* 20 |c_ULTIMATE.start_main_~y~0#1|) 100 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (<= |c_ULTIMATE.start_main_~k~0#1| (+ 9 |c_ULTIMATE.start_main_~c~0#1|))) is different from false [2021-11-20 06:46:11,879 WARN L838 $PredicateComparison]: unable to prove that (or (<= |c_ULTIMATE.start_main_~k~0#1| (+ |c_ULTIMATE.start_main_~c~0#1| 10)) (= (+ (* 22 |c_ULTIMATE.start_main_~y~0#1|) 121 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (+ (* 11 |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|))) (not (= (mod (let ((.cse0 (+ 9 |c_ULTIMATE.start_main_~y~0#1|))) (+ (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 1) .cse0 .cse0) (* (- 2) .cse0 .cse0 .cse0))) (- 4)) 0))) is different from false [2021-11-20 06:46:19,953 WARN L838 $PredicateComparison]: unable to prove that (or (= (+ 144 (* 24 |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (+ (* 12 |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|))) (<= |c_ULTIMATE.start_main_~k~0#1| (+ |c_ULTIMATE.start_main_~c~0#1| 11)) (not (= (mod (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 10))) (+ (* (- 2) .cse0 .cse0 .cse0) (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 1) .cse0 .cse0))) (- 4)) 0))) is different from false [2021-11-20 06:46:28,055 WARN L838 $PredicateComparison]: unable to prove that (or (<= |c_ULTIMATE.start_main_~k~0#1| (+ |c_ULTIMATE.start_main_~c~0#1| 12)) (not (= (mod (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 11))) (+ (* (- 2) .cse0 .cse0 .cse0) (* (- 1) .cse0 .cse0) (* (- 1) .cse0 .cse0 .cse0 .cse0))) (- 4)) 0)) (= (+ (* 13 |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|)) (+ 169 (* 26 |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)))) is different from false [2021-11-20 06:46:36,124 WARN L838 $PredicateComparison]: unable to prove that (or (not (= (mod (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 12))) (+ (* (- 2) .cse0 .cse0 .cse0) (* (- 1) .cse0 .cse0) (* (- 1) .cse0 .cse0 .cse0 .cse0))) (- 4)) 0)) (<= |c_ULTIMATE.start_main_~k~0#1| (+ |c_ULTIMATE.start_main_~c~0#1| 13)) (= (+ 196 (* 28 |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (+ (* 14 |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|)))) is different from false [2021-11-20 06:46:44,627 WARN L838 $PredicateComparison]: unable to prove that (or (= (+ 225 (* 30 |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (+ (* 15 |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|))) (not (= (mod (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 13))) (+ (* (- 2) .cse0 .cse0 .cse0) (* (- 1) .cse0 .cse0) (* (- 1) .cse0 .cse0 .cse0 .cse0))) (- 4)) 0)) (<= |c_ULTIMATE.start_main_~k~0#1| (+ 14 |c_ULTIMATE.start_main_~c~0#1|))) is different from false [2021-11-20 06:46:52,708 WARN L838 $PredicateComparison]: unable to prove that (or (= (+ (* 16 |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|)) (+ (* 32 |c_ULTIMATE.start_main_~y~0#1|) 256 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (not (= (mod (let ((.cse0 (+ 14 |c_ULTIMATE.start_main_~y~0#1|))) (+ (* (- 1) .cse0 .cse0) (* (- 2) .cse0 .cse0 .cse0) (* (- 1) .cse0 .cse0 .cse0 .cse0))) (- 4)) 0)) (<= |c_ULTIMATE.start_main_~k~0#1| (+ |c_ULTIMATE.start_main_~c~0#1| 15))) is different from false [2021-11-20 06:47:00,777 WARN L838 $PredicateComparison]: unable to prove that (or (= (+ (* 17 |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|)) (+ (* 34 |c_ULTIMATE.start_main_~y~0#1|) 289 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (<= |c_ULTIMATE.start_main_~k~0#1| (+ 16 |c_ULTIMATE.start_main_~c~0#1|)) (not (= (mod (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 15))) (+ (* (- 2) .cse0 .cse0 .cse0) (* (- 1) .cse0 .cse0) (* (- 1) .cse0 .cse0 .cse0 .cse0))) (- 4)) 0))) is different from false [2021-11-20 06:47:09,390 WARN L838 $PredicateComparison]: unable to prove that (or (not (= (mod (let ((.cse0 (+ 16 |c_ULTIMATE.start_main_~y~0#1|))) (+ (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 2) .cse0 .cse0 .cse0) (* (- 1) .cse0 .cse0))) (- 4)) 0)) (= (+ 324 (* 36 |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (+ (* 18 |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|))) (<= |c_ULTIMATE.start_main_~k~0#1| (+ |c_ULTIMATE.start_main_~c~0#1| 17))) is different from false [2021-11-20 06:47:17,453 WARN L838 $PredicateComparison]: unable to prove that (or (not (= (mod (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 17))) (+ (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 2) .cse0 .cse0 .cse0) (* (- 1) .cse0 .cse0))) (- 4)) 0)) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 19 |c_ULTIMATE.start_main_~k~0#1|)) (+ 361 (* 38 |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (<= |c_ULTIMATE.start_main_~k~0#1| (+ |c_ULTIMATE.start_main_~c~0#1| 18))) is different from false [2021-11-20 06:47:25,593 WARN L838 $PredicateComparison]: unable to prove that (or (= (+ (* 20 |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|)) (+ 400 (* 40 |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (<= |c_ULTIMATE.start_main_~k~0#1| (+ 19 |c_ULTIMATE.start_main_~c~0#1|)) (not (= (mod (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 18))) (+ (* (- 2) .cse0 .cse0 .cse0) (* (- 1) .cse0 .cse0) (* (- 1) .cse0 .cse0 .cse0 .cse0))) (- 4)) 0))) is different from false [2021-11-20 06:47:29,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 154 proven. 4 refuted. 0 times theorem prover too weak. 726 trivial. 628 not checked. [2021-11-20 06:47:29,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:47:29,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632563834] [2021-11-20 06:47:29,714 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:47:29,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569517037] [2021-11-20 06:47:29,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569517037] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:47:29,714 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:47:29,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 59 [2021-11-20 06:47:29,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578142772] [2021-11-20 06:47:29,715 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:47:29,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-20 06:47:29,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:47:29,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-20 06:47:29,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1262, Unknown=21, NotChecked=1932, Total=3422 [2021-11-20 06:47:29,719 INFO L87 Difference]: Start difference. First operand 80 states and 99 transitions. Second operand has 59 states, 59 states have (on average 1.728813559322034) internal successors, (102), 54 states have internal predecessors, (102), 44 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2021-11-20 06:47:54,981 WARN L227 SmtUtils]: Spent 8.29s on a formula simplification. DAG size of input: 55 DAG size of output: 36 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:47:55,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:47:55,392 INFO L93 Difference]: Finished difference Result 99 states and 122 transitions. [2021-11-20 06:47:55,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-20 06:47:55,392 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.728813559322034) internal successors, (102), 54 states have internal predecessors, (102), 44 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) Word has length 155 [2021-11-20 06:47:55,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:47:55,394 INFO L225 Difference]: With dead ends: 99 [2021-11-20 06:47:55,395 INFO L226 Difference]: Without dead ends: 93 [2021-11-20 06:47:55,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 250 SyntacticMatches, 3 SemanticMatches, 88 ConstructedPredicates, 21 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 67.8s TimeCoverageRelationStatistics Valid=487, Invalid=4268, Unknown=21, NotChecked=3234, Total=8010 [2021-11-20 06:47:55,399 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 104 mSDsluCounter, 1657 mSDsCounter, 0 mSdLazyCounter, 1477 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 1707 SdHoareTripleChecker+Invalid, 3256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1622 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:47:55,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 1707 Invalid, 3256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1477 Invalid, 0 Unknown, 1622 Unchecked, 1.4s Time] [2021-11-20 06:47:55,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-20 06:47:55,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-11-20 06:47:55,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 25 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-20 06:47:55,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2021-11-20 06:47:55,414 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 155 [2021-11-20 06:47:55,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:47:55,415 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2021-11-20 06:47:55,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.728813559322034) internal successors, (102), 54 states have internal predecessors, (102), 44 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2021-11-20 06:47:55,416 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2021-11-20 06:47:55,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-20 06:47:55,419 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:47:55,419 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:47:55,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-20 06:47:55,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-20 06:47:55,626 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:47:55,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:47:55,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1441462632, now seen corresponding path program 21 times [2021-11-20 06:47:55,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:47:55,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578434553] [2021-11-20 06:47:55,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:47:55,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:47:55,634 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:47:55,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1419523901] [2021-11-20 06:47:55,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:47:55,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:47:55,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:47:55,636 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:47:55,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-20 06:47:56,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-11-20 06:47:56,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:47:56,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-20 06:47:56,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:47:57,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 966 proven. 0 refuted. 0 times theorem prover too weak. 1014 trivial. 0 not checked. [2021-11-20 06:47:57,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:47:57,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:47:57,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578434553] [2021-11-20 06:47:57,979 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:47:57,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419523901] [2021-11-20 06:47:57,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419523901] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:47:57,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:47:57,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-11-20 06:47:57,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100537709] [2021-11-20 06:47:57,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:47:57,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-20 06:47:57,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:47:57,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-20 06:47:57,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-11-20 06:47:57,983 INFO L87 Difference]: Start difference. First operand 93 states and 114 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 24 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-20 06:47:58,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:47:58,871 INFO L93 Difference]: Finished difference Result 97 states and 117 transitions. [2021-11-20 06:47:58,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-20 06:47:58,875 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 24 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 176 [2021-11-20 06:47:58,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:47:58,876 INFO L225 Difference]: With dead ends: 97 [2021-11-20 06:47:58,876 INFO L226 Difference]: Without dead ends: 0 [2021-11-20 06:47:58,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=877, Invalid=1475, Unknown=0, NotChecked=0, Total=2352 [2021-11-20 06:47:58,883 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 5 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:47:58,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 278 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:47:58,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-20 06:47:58,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-20 06:47:58,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:58,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-20 06:47:58,885 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 176 [2021-11-20 06:47:58,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:47:58,886 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-20 06:47:58,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 24 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-20 06:47:58,886 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-20 06:47:58,886 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-20 06:47:58,889 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-20 06:47:58,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-20 06:47:59,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-20 06:47:59,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-20 06:48:01,744 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-20 06:48:01,745 INFO L854 garLoopResultBuilder]: At program point L27-2(lines 27 36) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1)) (.cse1 (= (+ (* 2 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* 4 |ULTIMATE.start_main_~x~0#1|))) (.cse2 (<= |ULTIMATE.start_main_~k~0#1| 20))) (or (and .cse0 (< 9 |ULTIMATE.start_main_~k~0#1|) (= |ULTIMATE.start_main_~c~0#1| 10) (= |ULTIMATE.start_main_~y~0#1| 10) .cse1 .cse2) (and .cse0 (< 12 |ULTIMATE.start_main_~k~0#1|) (= |ULTIMATE.start_main_~c~0#1| 13) .cse1 (= |ULTIMATE.start_main_~y~0#1| 13) .cse2) (and .cse0 (= 2 |ULTIMATE.start_main_~y~0#1|) (< 1 |ULTIMATE.start_main_~k~0#1|) .cse1 (= 2 |ULTIMATE.start_main_~c~0#1|) .cse2) (and .cse0 (= 6 |ULTIMATE.start_main_~y~0#1|) .cse1 (= 6 |ULTIMATE.start_main_~c~0#1|) (< 5 |ULTIMATE.start_main_~k~0#1|) .cse2) (and .cse0 (= 7 |ULTIMATE.start_main_~c~0#1|) (= 7 |ULTIMATE.start_main_~y~0#1|) (< 6 |ULTIMATE.start_main_~k~0#1|) .cse1 .cse2) (and .cse0 (= |ULTIMATE.start_main_~y~0#1| 20) (<= |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~c~0#1|) .cse1 (< 19 |ULTIMATE.start_main_~k~0#1|) .cse2) (and .cse0 (< 13 |ULTIMATE.start_main_~k~0#1|) (= 14 |ULTIMATE.start_main_~y~0#1|) (= 14 |ULTIMATE.start_main_~c~0#1|) .cse1 .cse2) (and .cse0 (<= 19 |ULTIMATE.start_main_~c~0#1|) (<= |ULTIMATE.start_main_~c~0#1| 19) .cse1 (= 19 |ULTIMATE.start_main_~y~0#1|) (< 18 |ULTIMATE.start_main_~k~0#1|) .cse2) (and .cse0 (= 5 |ULTIMATE.start_main_~y~0#1|) (< 4 |ULTIMATE.start_main_~k~0#1|) (= 5 |ULTIMATE.start_main_~c~0#1|) .cse1 .cse2) (and (<= 0 |ULTIMATE.start_main_~k~0#1|) .cse0 (= |ULTIMATE.start_main_~c~0#1| 0) (= |ULTIMATE.start_main_~y~0#1| 0) .cse1 .cse2) (and .cse0 (= |ULTIMATE.start_main_~c~0#1| 18) (< 17 |ULTIMATE.start_main_~k~0#1|) (= |ULTIMATE.start_main_~y~0#1| 18) .cse1 .cse2) (and .cse0 (= |ULTIMATE.start_main_~c~0#1| 8) (= |ULTIMATE.start_main_~y~0#1| 8) (< 7 |ULTIMATE.start_main_~k~0#1|) .cse1 .cse2) (and .cse0 (= |ULTIMATE.start_main_~y~0#1| 4) (< 3 |ULTIMATE.start_main_~k~0#1|) (= |ULTIMATE.start_main_~c~0#1| 4) .cse1 .cse2) (and .cse0 (= |ULTIMATE.start_main_~c~0#1| 1) (= |ULTIMATE.start_main_~y~0#1| 1) (< 0 |ULTIMATE.start_main_~k~0#1|) .cse1 .cse2) (and .cse0 (= |ULTIMATE.start_main_~y~0#1| 12) (< 11 |ULTIMATE.start_main_~k~0#1|) .cse1 (= |ULTIMATE.start_main_~c~0#1| 12) .cse2) (and .cse0 (= 3 |ULTIMATE.start_main_~y~0#1|) (< 2 |ULTIMATE.start_main_~k~0#1|) (= 3 |ULTIMATE.start_main_~c~0#1|) .cse1 .cse2) (and .cse0 (< 16 |ULTIMATE.start_main_~k~0#1|) (= |ULTIMATE.start_main_~y~0#1| 17) (= |ULTIMATE.start_main_~c~0#1| 17) .cse1 .cse2) (and .cse0 (= 9 |ULTIMATE.start_main_~c~0#1|) (< 8 |ULTIMATE.start_main_~k~0#1|) .cse1 (= 9 |ULTIMATE.start_main_~y~0#1|) .cse2) (and .cse0 (< 10 |ULTIMATE.start_main_~k~0#1|) (= |ULTIMATE.start_main_~c~0#1| 11) (= |ULTIMATE.start_main_~y~0#1| 11) .cse1 .cse2) (and .cse0 (< 14 |ULTIMATE.start_main_~k~0#1|) .cse1 (= |ULTIMATE.start_main_~y~0#1| 15) (= |ULTIMATE.start_main_~c~0#1| 15) .cse2) (and .cse0 (= 16 |ULTIMATE.start_main_~y~0#1|) (< 15 |ULTIMATE.start_main_~k~0#1|) (= 16 |ULTIMATE.start_main_~c~0#1|) .cse1 .cse2))) [2021-11-20 06:48:01,745 INFO L854 garLoopResultBuilder]: At program point L27-3(lines 27 36) the Hoare annotation is: (let ((.cse1 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (let ((.cse0 (= (+ (* 2 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|) .cse1) (* 4 |ULTIMATE.start_main_~x~0#1|)))) (or (and (<= |ULTIMATE.start_main_~k~0#1| 1) (<= |ULTIMATE.start_main_~c~0#1| 1) (= |ULTIMATE.start_main_~y~0#1| 1) (< 0 |ULTIMATE.start_main_~k~0#1|) .cse0) (and (< 14 |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~c~0#1| 15) (<= |ULTIMATE.start_main_~k~0#1| 15) .cse0 (= |ULTIMATE.start_main_~y~0#1| 15)) (and (<= |ULTIMATE.start_main_~c~0#1| 5) (= 5 |ULTIMATE.start_main_~y~0#1|) (< 4 |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~k~0#1| 5) .cse0) (and (< 10 |ULTIMATE.start_main_~k~0#1|) (= |ULTIMATE.start_main_~y~0#1| 11) (<= |ULTIMATE.start_main_~c~0#1| 11) .cse0 (<= |ULTIMATE.start_main_~k~0#1| 11)) (and (<= |ULTIMATE.start_main_~k~0#1| 16) (= 16 |ULTIMATE.start_main_~y~0#1|) (< 15 |ULTIMATE.start_main_~k~0#1|) .cse0 (<= |ULTIMATE.start_main_~c~0#1| 16)) (and (<= |ULTIMATE.start_main_~k~0#1| 14) (<= |ULTIMATE.start_main_~c~0#1| 14) (< 13 |ULTIMATE.start_main_~k~0#1|) (= 14 |ULTIMATE.start_main_~y~0#1|) .cse0) (and (<= |ULTIMATE.start_main_~k~0#1| 9) (< 8 |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~c~0#1| 9) .cse0 (= 9 |ULTIMATE.start_main_~y~0#1|)) (and (< 12 |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~k~0#1| 13) .cse0 (<= |ULTIMATE.start_main_~c~0#1| 13) (= |ULTIMATE.start_main_~y~0#1| 13)) (and (<= |ULTIMATE.start_main_~c~0#1| 8) (<= |ULTIMATE.start_main_~k~0#1| 8) (= |ULTIMATE.start_main_~y~0#1| 8) (< 7 |ULTIMATE.start_main_~k~0#1|) .cse0) (and (<= |ULTIMATE.start_main_~k~0#1| 18) (< 17 |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~c~0#1| 18) (= |ULTIMATE.start_main_~y~0#1| 18) .cse0) (and (= 7 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~k~0#1| 7) (< 6 |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~c~0#1| 7) .cse0) (and (= |ULTIMATE.start_main_~y~0#1| 12) (< 11 |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~c~0#1| 12) (<= |ULTIMATE.start_main_~k~0#1| 12) .cse0) (and (= |ULTIMATE.start_main_~y~0#1| 0) (= |ULTIMATE.start_main_~x~0#1| 0)) (and (<= |ULTIMATE.start_main_~k~0#1| 2) (= 2 |ULTIMATE.start_main_~y~0#1|) (< 1 |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~c~0#1| 2) .cse0) (and (< 16 |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~k~0#1| 17) (= |ULTIMATE.start_main_~y~0#1| 17) .cse0 (<= |ULTIMATE.start_main_~c~0#1| 17)) (and (= 3 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~k~0#1| 3) (< 2 |ULTIMATE.start_main_~k~0#1|) .cse0 (<= |ULTIMATE.start_main_~c~0#1| 3)) (and (<= 0 |ULTIMATE.start_main_~k~0#1|) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~c~0#1|) (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|) .cse1) .cse0 (<= |ULTIMATE.start_main_~k~0#1| 20)) (and (< 9 |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~c~0#1| 10) (<= |ULTIMATE.start_main_~k~0#1| 10) (= |ULTIMATE.start_main_~y~0#1| 10) .cse0) (and (<= |ULTIMATE.start_main_~c~0#1| 19) (<= |ULTIMATE.start_main_~k~0#1| 19) .cse0 (= 19 |ULTIMATE.start_main_~y~0#1|) (< 18 |ULTIMATE.start_main_~k~0#1|)) (and (<= |ULTIMATE.start_main_~c~0#1| 4) (= |ULTIMATE.start_main_~y~0#1| 4) (<= |ULTIMATE.start_main_~k~0#1| 4) (< 3 |ULTIMATE.start_main_~k~0#1|) .cse0) (and (= 6 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~k~0#1| 6) (<= |ULTIMATE.start_main_~c~0#1| 6) .cse0 (< 5 |ULTIMATE.start_main_~k~0#1|))))) [2021-11-20 06:48:01,745 INFO L858 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2021-11-20 06:48:01,745 INFO L858 garLoopResultBuilder]: For program point L38(line 38) no Hoare annotation was computed. [2021-11-20 06:48:01,745 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-11-20 06:48:01,745 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-20 06:48:01,746 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-11-20 06:48:01,746 INFO L854 garLoopResultBuilder]: At program point L28(line 28) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1)) (.cse1 (= (+ (* 2 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* 4 |ULTIMATE.start_main_~x~0#1|))) (.cse2 (<= |ULTIMATE.start_main_~k~0#1| 20))) (or (and .cse0 (< 9 |ULTIMATE.start_main_~k~0#1|) (= |ULTIMATE.start_main_~c~0#1| 10) (= |ULTIMATE.start_main_~y~0#1| 10) .cse1 .cse2) (and .cse0 (< 12 |ULTIMATE.start_main_~k~0#1|) (= |ULTIMATE.start_main_~c~0#1| 13) .cse1 (= |ULTIMATE.start_main_~y~0#1| 13) .cse2) (and .cse0 (= 2 |ULTIMATE.start_main_~y~0#1|) (< 1 |ULTIMATE.start_main_~k~0#1|) .cse1 (= 2 |ULTIMATE.start_main_~c~0#1|) .cse2) (and .cse0 (= 6 |ULTIMATE.start_main_~y~0#1|) .cse1 (= 6 |ULTIMATE.start_main_~c~0#1|) (< 5 |ULTIMATE.start_main_~k~0#1|) .cse2) (and .cse0 (= 7 |ULTIMATE.start_main_~c~0#1|) (= 7 |ULTIMATE.start_main_~y~0#1|) (< 6 |ULTIMATE.start_main_~k~0#1|) .cse1 .cse2) (and .cse0 (= |ULTIMATE.start_main_~y~0#1| 20) (<= |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~c~0#1|) .cse1 (< 19 |ULTIMATE.start_main_~k~0#1|) .cse2) (and .cse0 (< 13 |ULTIMATE.start_main_~k~0#1|) (= 14 |ULTIMATE.start_main_~y~0#1|) (= 14 |ULTIMATE.start_main_~c~0#1|) .cse1 .cse2) (and .cse0 (<= 19 |ULTIMATE.start_main_~c~0#1|) (<= |ULTIMATE.start_main_~c~0#1| 19) .cse1 (= 19 |ULTIMATE.start_main_~y~0#1|) (< 18 |ULTIMATE.start_main_~k~0#1|) .cse2) (and .cse0 (= 5 |ULTIMATE.start_main_~y~0#1|) (< 4 |ULTIMATE.start_main_~k~0#1|) (= 5 |ULTIMATE.start_main_~c~0#1|) .cse1 .cse2) (and (<= 0 |ULTIMATE.start_main_~k~0#1|) .cse0 (= |ULTIMATE.start_main_~c~0#1| 0) (= |ULTIMATE.start_main_~y~0#1| 0) .cse1 .cse2) (and .cse0 (= |ULTIMATE.start_main_~c~0#1| 18) (< 17 |ULTIMATE.start_main_~k~0#1|) (= |ULTIMATE.start_main_~y~0#1| 18) .cse1 .cse2) (and .cse0 (= |ULTIMATE.start_main_~c~0#1| 8) (= |ULTIMATE.start_main_~y~0#1| 8) (< 7 |ULTIMATE.start_main_~k~0#1|) .cse1 .cse2) (and .cse0 (= |ULTIMATE.start_main_~y~0#1| 4) (< 3 |ULTIMATE.start_main_~k~0#1|) (= |ULTIMATE.start_main_~c~0#1| 4) .cse1 .cse2) (and .cse0 (= |ULTIMATE.start_main_~c~0#1| 1) (= |ULTIMATE.start_main_~y~0#1| 1) (< 0 |ULTIMATE.start_main_~k~0#1|) .cse1 .cse2) (and .cse0 (= |ULTIMATE.start_main_~y~0#1| 12) (< 11 |ULTIMATE.start_main_~k~0#1|) .cse1 (= |ULTIMATE.start_main_~c~0#1| 12) .cse2) (and .cse0 (= 3 |ULTIMATE.start_main_~y~0#1|) (< 2 |ULTIMATE.start_main_~k~0#1|) (= 3 |ULTIMATE.start_main_~c~0#1|) .cse1 .cse2) (and .cse0 (< 16 |ULTIMATE.start_main_~k~0#1|) (= |ULTIMATE.start_main_~y~0#1| 17) (= |ULTIMATE.start_main_~c~0#1| 17) .cse1 .cse2) (and .cse0 (= 9 |ULTIMATE.start_main_~c~0#1|) (< 8 |ULTIMATE.start_main_~k~0#1|) .cse1 (= 9 |ULTIMATE.start_main_~y~0#1|) .cse2) (and .cse0 (< 10 |ULTIMATE.start_main_~k~0#1|) (= |ULTIMATE.start_main_~c~0#1| 11) (= |ULTIMATE.start_main_~y~0#1| 11) .cse1 .cse2) (and .cse0 (< 14 |ULTIMATE.start_main_~k~0#1|) .cse1 (= |ULTIMATE.start_main_~y~0#1| 15) (= |ULTIMATE.start_main_~c~0#1| 15) .cse2) (and .cse0 (= 16 |ULTIMATE.start_main_~y~0#1|) (< 15 |ULTIMATE.start_main_~k~0#1|) (= 16 |ULTIMATE.start_main_~c~0#1|) .cse1 .cse2))) [2021-11-20 06:48:01,746 INFO L858 garLoopResultBuilder]: For program point L28-1(lines 27 36) no Hoare annotation was computed. [2021-11-20 06:48:01,746 INFO L861 garLoopResultBuilder]: At program point L39(lines 17 40) the Hoare annotation is: true [2021-11-20 06:48:01,746 INFO L858 garLoopResultBuilder]: For program point L6(lines 6 8) no Hoare annotation was computed. [2021-11-20 06:48:01,746 INFO L854 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: (= (+ (* 2 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* 4 |ULTIMATE.start_main_~x~0#1|)) [2021-11-20 06:48:01,746 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true [2021-11-20 06:48:01,747 INFO L858 garLoopResultBuilder]: For program point L11(lines 11 12) no Hoare annotation was computed. [2021-11-20 06:48:01,747 INFO L858 garLoopResultBuilder]: For program point L10(lines 10 13) no Hoare annotation was computed. [2021-11-20 06:48:01,747 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2021-11-20 06:48:01,747 INFO L858 garLoopResultBuilder]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2021-11-20 06:48:01,747 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2021-11-20 06:48:01,751 INFO L732 BasicCegarLoop]: Path program histogram: [21, 1, 1, 1] [2021-11-20 06:48:01,753 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 06:48:01,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 06:48:01 BoogieIcfgContainer [2021-11-20 06:48:01,797 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 06:48:01,798 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 06:48:01,798 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 06:48:01,798 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 06:48:01,799 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:43:48" (3/4) ... [2021-11-20 06:48:01,802 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-20 06:48:01,811 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-11-20 06:48:01,816 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-11-20 06:48:01,816 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-11-20 06:48:01,816 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-20 06:48:01,817 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-20 06:48:01,861 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/witness.graphml [2021-11-20 06:48:01,861 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 06:48:01,862 INFO L158 Benchmark]: Toolchain (without parser) took 253747.08ms. Allocated memory was 115.3MB in the beginning and 167.8MB in the end (delta: 52.4MB). Free memory was 88.9MB in the beginning and 69.3MB in the end (delta: 19.6MB). Peak memory consumption was 75.8MB. Max. memory is 16.1GB. [2021-11-20 06:48:01,863 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 83.9MB. Free memory was 51.5MB in the beginning and 51.4MB in the end (delta: 37.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 06:48:01,863 INFO L158 Benchmark]: CACSL2BoogieTranslator took 252.32ms. Allocated memory is still 115.3MB. Free memory was 88.7MB in the beginning and 79.0MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-20 06:48:01,864 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.80ms. Allocated memory is still 115.3MB. Free memory was 78.8MB in the beginning and 77.5MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 06:48:01,864 INFO L158 Benchmark]: Boogie Preprocessor took 40.05ms. Allocated memory is still 115.3MB. Free memory was 77.5MB in the beginning and 76.4MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 06:48:01,865 INFO L158 Benchmark]: RCFGBuilder took 326.98ms. Allocated memory is still 115.3MB. Free memory was 76.4MB in the beginning and 67.1MB in the end (delta: 9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-20 06:48:01,865 INFO L158 Benchmark]: TraceAbstraction took 253001.64ms. Allocated memory was 115.3MB in the beginning and 167.8MB in the end (delta: 52.4MB). Free memory was 66.7MB in the beginning and 71.4MB in the end (delta: -4.7MB). Peak memory consumption was 76.5MB. Max. memory is 16.1GB. [2021-11-20 06:48:01,866 INFO L158 Benchmark]: Witness Printer took 63.92ms. Allocated memory is still 167.8MB. Free memory was 71.4MB in the beginning and 69.3MB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-20 06:48:01,868 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 83.9MB. Free memory was 51.5MB in the beginning and 51.4MB in the end (delta: 37.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 252.32ms. Allocated memory is still 115.3MB. Free memory was 88.7MB in the beginning and 79.0MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 43.80ms. Allocated memory is still 115.3MB. Free memory was 78.8MB in the beginning and 77.5MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 40.05ms. Allocated memory is still 115.3MB. Free memory was 77.5MB in the beginning and 76.4MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 326.98ms. Allocated memory is still 115.3MB. Free memory was 76.4MB in the beginning and 67.1MB in the end (delta: 9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 253001.64ms. Allocated memory was 115.3MB in the beginning and 167.8MB in the end (delta: 52.4MB). Free memory was 66.7MB in the beginning and 71.4MB in the end (delta: -4.7MB). Peak memory consumption was 76.5MB. Max. memory is 16.1GB. * Witness Printer took 63.92ms. Allocated memory is still 167.8MB. Free memory was 71.4MB in the beginning and 69.3MB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 252.9s, OverallIterations: 24, TraceHistogramMax: 25, PathProgramHistogramMax: 21, EmptinessCheckTime: 0.1s, AutomataDifference: 34.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.6s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 162 SdHoareTripleChecker+Valid, 8.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 159 mSDsluCounter, 12304 SdHoareTripleChecker+Invalid, 6.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1622 IncrementalHoareTripleChecker+Unchecked, 11301 mSDsCounter, 206 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9323 IncrementalHoareTripleChecker+Invalid, 11151 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 206 mSolverCounterUnsat, 1003 mSDtfsCounter, 9323 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2531 GetRequests, 1992 SyntacticMatches, 23 SemanticMatches, 516 ConstructedPredicates, 21 IntricatePredicates, 0 DeprecatedPredicates, 1280 ImplicationChecksByTransitivity, 76.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=93occurred in iteration=23, InterpolantAutomatonStates: 377, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 24 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 57 PreInvPairs, 124 NumberOfFragments, 2154 HoareAnnotationTreeSize, 57 FomulaSimplifications, 449 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 6 FomulaSimplificationsInter, 104 FormulaSimplificationTreeSizeReductionInter, 2.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 24.7s SatisfiabilityAnalysisTime, 184.7s InterpolantComputationTime, 1980 NumberOfCodeBlocks, 1974 NumberOfCodeBlocksAsserted, 147 NumberOfCheckSat, 2125 ConstructedInterpolants, 0 QuantifiedInterpolants, 11773 SizeOfPredicates, 50 NumberOfNonLiveVariables, 5205 ConjunctsInSsa, 1050 ConjunctsInUnsatCore, 26 InterpolantComputations, 4 PerfectInterpolantSequences, 9483/14740 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((cond == 1 && 9 < k) && c == 10) && y == 10) && 2 * (y * y * y) + y * y * y * y + y * y == 4 * x) && k <= 20) || (((((cond == 1 && 12 < k) && c == 13) && 2 * (y * y * y) + y * y * y * y + y * y == 4 * x) && y == 13) && k <= 20)) || (((((cond == 1 && 2 == y) && 1 < k) && 2 * (y * y * y) + y * y * y * y + y * y == 4 * x) && 2 == c) && k <= 20)) || (((((cond == 1 && 6 == y) && 2 * (y * y * y) + y * y * y * y + y * y == 4 * x) && 6 == c) && 5 < k) && k <= 20)) || (((((cond == 1 && 7 == c) && 7 == y) && 6 < k) && 2 * (y * y * y) + y * y * y * y + y * y == 4 * x) && k <= 20)) || (((((cond == 1 && y == 20) && k <= c) && 2 * (y * y * y) + y * y * y * y + y * y == 4 * x) && 19 < k) && k <= 20)) || (((((cond == 1 && 13 < k) && 14 == y) && 14 == c) && 2 * (y * y * y) + y * y * y * y + y * y == 4 * x) && k <= 20)) || ((((((cond == 1 && 19 <= c) && c <= 19) && 2 * (y * y * y) + y * y * y * y + y * y == 4 * x) && 19 == y) && 18 < k) && k <= 20)) || (((((cond == 1 && 5 == y) && 4 < k) && 5 == c) && 2 * (y * y * y) + y * y * y * y + y * y == 4 * x) && k <= 20)) || (((((0 <= k && cond == 1) && c == 0) && y == 0) && 2 * (y * y * y) + y * y * y * y + y * y == 4 * x) && k <= 20)) || (((((cond == 1 && c == 18) && 17 < k) && y == 18) && 2 * (y * y * y) + y * y * y * y + y * y == 4 * x) && k <= 20)) || (((((cond == 1 && c == 8) && y == 8) && 7 < k) && 2 * (y * y * y) + y * y * y * y + y * y == 4 * x) && k <= 20)) || (((((cond == 1 && y == 4) && 3 < k) && c == 4) && 2 * (y * y * y) + y * y * y * y + y * y == 4 * x) && k <= 20)) || (((((cond == 1 && c == 1) && y == 1) && 0 < k) && 2 * (y * y * y) + y * y * y * y + y * y == 4 * x) && k <= 20)) || (((((cond == 1 && y == 12) && 11 < k) && 2 * (y * y * y) + y * y * y * y + y * y == 4 * x) && c == 12) && k <= 20)) || (((((cond == 1 && 3 == y) && 2 < k) && 3 == c) && 2 * (y * y * y) + y * y * y * y + y * y == 4 * x) && k <= 20)) || (((((cond == 1 && 16 < k) && y == 17) && c == 17) && 2 * (y * y * y) + y * y * y * y + y * y == 4 * x) && k <= 20)) || (((((cond == 1 && 9 == c) && 8 < k) && 2 * (y * y * y) + y * y * y * y + y * y == 4 * x) && 9 == y) && k <= 20)) || (((((cond == 1 && 10 < k) && c == 11) && y == 11) && 2 * (y * y * y) + y * y * y * y + y * y == 4 * x) && k <= 20)) || (((((cond == 1 && 14 < k) && 2 * (y * y * y) + y * y * y * y + y * y == 4 * x) && y == 15) && c == 15) && k <= 20)) || (((((cond == 1 && 16 == y) && 15 < k) && 16 == c) && 2 * (y * y * y) + y * y * y * y + y * y == 4 * x) && k <= 20) - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-11-20 06:48:01,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4acbdd1c-8d5a-4d5a-8d0b-8e4f89799b4a/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE