./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0 --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 05dbf98a57cbdf117305bcdd9c3dde8d1b2284b890adec5d1f5924f0e5e4bbbb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 15:37:34,586 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 15:37:34,588 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 15:37:34,656 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 15:37:34,657 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 15:37:34,663 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 15:37:34,665 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 15:37:34,670 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 15:37:34,673 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 15:37:34,682 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 15:37:34,683 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 15:37:34,685 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 15:37:34,686 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 15:37:34,690 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 15:37:34,693 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 15:37:34,699 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 15:37:34,703 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 15:37:34,705 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 15:37:34,713 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 15:37:34,716 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 15:37:34,740 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 15:37:34,742 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 15:37:34,743 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 15:37:34,744 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 15:37:34,748 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 15:37:34,749 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 15:37:34,749 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 15:37:34,750 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 15:37:34,751 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 15:37:34,752 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 15:37:34,753 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 15:37:34,754 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 15:37:34,755 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 15:37:34,756 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 15:37:34,758 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 15:37:34,758 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 15:37:34,759 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 15:37:34,760 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 15:37:34,760 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 15:37:34,762 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 15:37:34,762 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 15:37:34,764 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 15:37:34,813 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 15:37:34,816 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 15:37:34,817 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 15:37:34,817 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 15:37:34,825 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 15:37:34,826 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 15:37:34,826 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 15:37:34,826 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 15:37:34,827 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 15:37:34,827 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 15:37:34,828 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 15:37:34,829 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 15:37:34,829 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 15:37:34,829 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 15:37:34,829 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 15:37:34,830 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 15:37:34,830 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 15:37:34,830 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 15:37:34,830 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 15:37:34,831 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 15:37:34,831 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 15:37:34,831 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 15:37:34,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:37:34,832 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 15:37:34,832 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 15:37:34,832 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 15:37:34,832 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 15:37:34,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 15:37:34,833 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 15:37:34,835 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 15:37:34,835 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 15:37:34,835 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 15:37:34,836 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_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 05dbf98a57cbdf117305bcdd9c3dde8d1b2284b890adec5d1f5924f0e5e4bbbb [2021-11-22 15:37:35,158 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 15:37:35,204 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 15:37:35,207 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 15:37:35,209 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 15:37:35,210 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 15:37:35,211 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c [2021-11-22 15:37:35,315 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/data/92810762b/1493522929144fc18df2b41d1aec1a31/FLAG86f4ed21f [2021-11-22 15:37:35,890 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 15:37:35,890 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c [2021-11-22 15:37:35,897 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/data/92810762b/1493522929144fc18df2b41d1aec1a31/FLAG86f4ed21f [2021-11-22 15:37:36,277 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/data/92810762b/1493522929144fc18df2b41d1aec1a31 [2021-11-22 15:37:36,280 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 15:37:36,281 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 15:37:36,283 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 15:37:36,284 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 15:37:36,288 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 15:37:36,289 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:37:36" (1/1) ... [2021-11-22 15:37:36,290 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@481014b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:37:36, skipping insertion in model container [2021-11-22 15:37:36,290 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:37:36" (1/1) ... [2021-11-22 15:37:36,299 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 15:37:36,319 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 15:37:36,456 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_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c[490,503] [2021-11-22 15:37:36,478 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:37:36,487 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 15:37:36,502 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_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c[490,503] [2021-11-22 15:37:36,513 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:37:36,539 INFO L208 MainTranslator]: Completed translation [2021-11-22 15:37:36,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:37:36 WrapperNode [2021-11-22 15:37:36,541 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 15:37:36,543 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 15:37:36,544 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 15:37:36,544 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 15:37:36,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:37:36" (1/1) ... [2021-11-22 15:37:36,560 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:37:36" (1/1) ... [2021-11-22 15:37:36,596 INFO L137 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 117 [2021-11-22 15:37:36,596 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 15:37:36,597 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 15:37:36,597 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 15:37:36,598 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 15:37:36,607 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:37:36" (1/1) ... [2021-11-22 15:37:36,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:37:36" (1/1) ... [2021-11-22 15:37:36,609 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:37:36" (1/1) ... [2021-11-22 15:37:36,610 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:37:36" (1/1) ... [2021-11-22 15:37:36,615 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:37:36" (1/1) ... [2021-11-22 15:37:36,627 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:37:36" (1/1) ... [2021-11-22 15:37:36,629 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:37:36" (1/1) ... [2021-11-22 15:37:36,634 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 15:37:36,635 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 15:37:36,635 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 15:37:36,636 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 15:37:36,637 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:37:36" (1/1) ... [2021-11-22 15:37:36,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:37:36,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:37:36,691 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 15:37:36,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 15:37:36,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 15:37:36,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 15:37:36,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 15:37:36,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 15:37:36,811 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 15:37:36,813 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 15:37:36,991 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 15:37:37,000 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 15:37:37,000 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-22 15:37:37,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:37:37 BoogieIcfgContainer [2021-11-22 15:37:37,003 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 15:37:37,005 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 15:37:37,006 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 15:37:37,021 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 15:37:37,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 03:37:36" (1/3) ... [2021-11-22 15:37:37,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56ed7915 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:37:37, skipping insertion in model container [2021-11-22 15:37:37,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:37:36" (2/3) ... [2021-11-22 15:37:37,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56ed7915 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:37:37, skipping insertion in model container [2021-11-22 15:37:37,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:37:37" (3/3) ... [2021-11-22 15:37:37,026 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound50.c [2021-11-22 15:37:37,032 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 15:37:37,033 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-22 15:37:37,121 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 15:37:37,162 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 [2021-11-22 15:37:37,162 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-22 15:37:37,184 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 41 states have internal predecessors, (59), 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) [2021-11-22 15:37:37,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-22 15:37:37,191 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:37:37,192 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:37:37,193 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-22 15:37:37,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:37:37,200 INFO L85 PathProgramCache]: Analyzing trace with hash -174496848, now seen corresponding path program 1 times [2021-11-22 15:37:37,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:37:37,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822087391] [2021-11-22 15:37:37,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:37:37,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:37:37,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:37:37,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:37:37,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:37:37,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822087391] [2021-11-22 15:37:37,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822087391] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:37:37,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:37:37,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 15:37:37,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224171057] [2021-11-22 15:37:37,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:37:37,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-22 15:37:37,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:37:37,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-22 15:37:37,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 15:37:37,421 INFO L87 Difference]: Start difference. First operand has 42 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 41 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:37:37,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:37:37,445 INFO L93 Difference]: Finished difference Result 81 states and 114 transitions. [2021-11-22 15:37:37,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-22 15:37:37,447 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-22 15:37:37,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:37:37,457 INFO L225 Difference]: With dead ends: 81 [2021-11-22 15:37:37,457 INFO L226 Difference]: Without dead ends: 38 [2021-11-22 15:37:37,461 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 [2021-11-22 15:37:37,466 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:37:37,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:37:37,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-22 15:37:37,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-22 15:37:37,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 37 states have internal predecessors, (40), 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) [2021-11-22 15:37:37,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-11-22 15:37:37,508 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 14 [2021-11-22 15:37:37,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:37:37,509 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-11-22 15:37:37,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:37:37,510 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-11-22 15:37:37,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-22 15:37:37,511 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:37:37,511 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:37:37,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 15:37:37,512 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-22 15:37:37,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:37:37,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1454171508, now seen corresponding path program 1 times [2021-11-22 15:37:37,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:37:37,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5611541] [2021-11-22 15:37:37,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:37:37,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:37:37,540 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:37:37,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2109089066] [2021-11-22 15:37:37,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:37:37,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:37:37,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:37:37,544 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:37:37,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 15:37:37,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:37:37,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-22 15:37:37,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:37:37,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:37:37,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 15:37:37,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:37:37,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5611541] [2021-11-22 15:37:37,905 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:37:37,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109089066] [2021-11-22 15:37:37,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109089066] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:37:37,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:37:37,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 15:37:37,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78988275] [2021-11-22 15:37:37,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:37:37,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 15:37:37,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:37:37,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 15:37:37,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:37:37,911 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:37:38,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:37:38,096 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2021-11-22 15:37:38,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 15:37:38,097 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-22 15:37:38,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:37:38,100 INFO L225 Difference]: With dead ends: 66 [2021-11-22 15:37:38,100 INFO L226 Difference]: Without dead ends: 62 [2021-11-22 15:37:38,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:37:38,105 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 137 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:37:38,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 62 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:37:38,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-22 15:37:38,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 40. [2021-11-22 15:37:38,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.2) internal successors, (42), 39 states have internal predecessors, (42), 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) [2021-11-22 15:37:38,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-11-22 15:37:38,120 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 15 [2021-11-22 15:37:38,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:37:38,120 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-11-22 15:37:38,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:37:38,121 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-11-22 15:37:38,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-22 15:37:38,122 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:37:38,122 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:37:38,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 15:37:38,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-22 15:37:38,350 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-22 15:37:38,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:37:38,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1580206288, now seen corresponding path program 1 times [2021-11-22 15:37:38,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:37:38,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505825649] [2021-11-22 15:37:38,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:37:38,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:37:38,387 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:37:38,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1409937453] [2021-11-22 15:37:38,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:37:38,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:37:38,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:37:38,398 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:37:38,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 15:37:38,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:37:38,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-22 15:37:38,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:37:38,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:37:38,643 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 15:37:38,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:37:38,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505825649] [2021-11-22 15:37:38,644 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:37:38,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409937453] [2021-11-22 15:37:38,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409937453] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:37:38,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:37:38,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 15:37:38,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579574267] [2021-11-22 15:37:38,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:37:38,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:37:38,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:37:38,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:37:38,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:37:38,647 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:37:38,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:37:38,752 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2021-11-22 15:37:38,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 15:37:38,753 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-22 15:37:38,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:37:38,754 INFO L225 Difference]: With dead ends: 62 [2021-11-22 15:37:38,755 INFO L226 Difference]: Without dead ends: 60 [2021-11-22 15:37:38,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:37:38,757 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 19 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:37:38,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 89 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:37:38,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-22 15:37:38,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2021-11-22 15:37:38,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.25) internal successors, (60), 52 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:37:38,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2021-11-22 15:37:38,770 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 17 [2021-11-22 15:37:38,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:37:38,770 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2021-11-22 15:37:38,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:37:38,771 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2021-11-22 15:37:38,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-22 15:37:38,772 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:37:38,772 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:37:38,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 15:37:38,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:37:38,994 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-22 15:37:38,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:37:38,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1840022701, now seen corresponding path program 1 times [2021-11-22 15:37:38,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:37:38,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991655834] [2021-11-22 15:37:38,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:37:38,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:37:39,013 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:37:39,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [773834117] [2021-11-22 15:37:39,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:37:39,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:37:39,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:37:39,015 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:37:39,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 15:37:39,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:37:39,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-22 15:37:39,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:37:39,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:37:39,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 15:37:39,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:37:39,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991655834] [2021-11-22 15:37:39,219 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:37:39,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773834117] [2021-11-22 15:37:39,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773834117] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:37:39,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:37:39,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 15:37:39,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074590023] [2021-11-22 15:37:39,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:37:39,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:37:39,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:37:39,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:37:39,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:37:39,223 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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) [2021-11-22 15:37:39,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:37:39,288 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2021-11-22 15:37:39,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 15:37:39,288 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-22 15:37:39,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:37:39,290 INFO L225 Difference]: With dead ends: 60 [2021-11-22 15:37:39,290 INFO L226 Difference]: Without dead ends: 58 [2021-11-22 15:37:39,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:37:39,292 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 15 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:37:39,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 79 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:37:39,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-22 15:37:39,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2021-11-22 15:37:39,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 52 states have internal predecessors, (59), 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) [2021-11-22 15:37:39,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2021-11-22 15:37:39,304 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 19 [2021-11-22 15:37:39,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:37:39,305 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2021-11-22 15:37:39,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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) [2021-11-22 15:37:39,305 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2021-11-22 15:37:39,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-22 15:37:39,306 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:37:39,306 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:37:39,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-22 15:37:39,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:37:39,520 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-22 15:37:39,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:37:39,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1383547082, now seen corresponding path program 1 times [2021-11-22 15:37:39,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:37:39,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532060032] [2021-11-22 15:37:39,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:37:39,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:37:39,538 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:37:39,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2052670004] [2021-11-22 15:37:39,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:37:39,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:37:39,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:37:39,540 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:37:39,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 15:37:39,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:37:39,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-22 15:37:39,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:37:39,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:37:39,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:37:39,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:37:39,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:37:39,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532060032] [2021-11-22 15:37:39,776 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:37:39,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052670004] [2021-11-22 15:37:39,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052670004] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:37:39,777 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:37:39,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-11-22 15:37:39,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905642027] [2021-11-22 15:37:39,778 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:37:39,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 15:37:39,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:37:39,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 15:37:39,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-22 15:37:39,780 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 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) [2021-11-22 15:37:39,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:37:39,991 INFO L93 Difference]: Finished difference Result 146 states and 163 transitions. [2021-11-22 15:37:39,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 15:37:39,992 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-22 15:37:39,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:37:39,994 INFO L225 Difference]: With dead ends: 146 [2021-11-22 15:37:39,994 INFO L226 Difference]: Without dead ends: 142 [2021-11-22 15:37:39,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-11-22 15:37:39,996 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 180 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:37:40,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 175 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:37:40,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-22 15:37:40,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 78. [2021-11-22 15:37:40,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.2876712328767124) internal successors, (94), 77 states have internal predecessors, (94), 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) [2021-11-22 15:37:40,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2021-11-22 15:37:40,029 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 20 [2021-11-22 15:37:40,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:37:40,030 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2021-11-22 15:37:40,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 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) [2021-11-22 15:37:40,030 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2021-11-22 15:37:40,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-22 15:37:40,031 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:37:40,031 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:37:40,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-22 15:37:40,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:37:40,232 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-22 15:37:40,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:37:40,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1264867958, now seen corresponding path program 1 times [2021-11-22 15:37:40,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:37:40,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419523331] [2021-11-22 15:37:40,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:37:40,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:37:40,248 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:37:40,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1442138540] [2021-11-22 15:37:40,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:37:40,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:37:40,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:37:40,249 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:37:40,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-22 15:37:40,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:37:40,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-22 15:37:40,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:37:40,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:37:40,432 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 15:37:40,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:37:40,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419523331] [2021-11-22 15:37:40,433 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:37:40,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442138540] [2021-11-22 15:37:40,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442138540] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:37:40,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:37:40,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 15:37:40,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703670008] [2021-11-22 15:37:40,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:37:40,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:37:40,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:37:40,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:37:40,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:37:40,436 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 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) [2021-11-22 15:37:40,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:37:40,525 INFO L93 Difference]: Finished difference Result 122 states and 148 transitions. [2021-11-22 15:37:40,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 15:37:40,526 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-22 15:37:40,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:37:40,528 INFO L225 Difference]: With dead ends: 122 [2021-11-22 15:37:40,528 INFO L226 Difference]: Without dead ends: 120 [2021-11-22 15:37:40,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:37:40,533 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 15 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:37:40,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 79 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:37:40,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-22 15:37:40,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 110. [2021-11-22 15:37:40,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.3047619047619048) internal successors, (137), 109 states have internal predecessors, (137), 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) [2021-11-22 15:37:40,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 137 transitions. [2021-11-22 15:37:40,573 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 137 transitions. Word has length 21 [2021-11-22 15:37:40,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:37:40,574 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 137 transitions. [2021-11-22 15:37:40,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 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) [2021-11-22 15:37:40,574 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 137 transitions. [2021-11-22 15:37:40,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-22 15:37:40,575 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:37:40,575 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:37:40,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-22 15:37:40,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:37:40,793 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-22 15:37:40,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:37:40,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1836874258, now seen corresponding path program 1 times [2021-11-22 15:37:40,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:37:40,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498590292] [2021-11-22 15:37:40,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:37:40,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:37:40,819 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:37:40,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1713848433] [2021-11-22 15:37:40,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:37:40,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:37:40,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:37:40,831 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:37:40,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-22 15:37:40,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:37:40,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-22 15:37:40,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:37:41,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:37:41,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:37:41,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:37:41,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:37:41,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498590292] [2021-11-22 15:37:41,583 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:37:41,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713848433] [2021-11-22 15:37:41,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713848433] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:37:41,592 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:37:41,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 15 [2021-11-22 15:37:41,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060758219] [2021-11-22 15:37:41,593 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:37:41,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-22 15:37:41,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:37:41,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-22 15:37:41,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-11-22 15:37:41,596 INFO L87 Difference]: Start difference. First operand 110 states and 137 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:37:42,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:37:42,383 INFO L93 Difference]: Finished difference Result 194 states and 233 transitions. [2021-11-22 15:37:42,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-22 15:37:42,384 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-22 15:37:42,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:37:42,387 INFO L225 Difference]: With dead ends: 194 [2021-11-22 15:37:42,387 INFO L226 Difference]: Without dead ends: 192 [2021-11-22 15:37:42,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2021-11-22 15:37:42,390 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 269 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 15:37:42,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 209 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 15:37:42,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-22 15:37:42,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 166. [2021-11-22 15:37:42,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 1.3167701863354038) internal successors, (212), 165 states have internal predecessors, (212), 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) [2021-11-22 15:37:42,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 212 transitions. [2021-11-22 15:37:42,424 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 212 transitions. Word has length 22 [2021-11-22 15:37:42,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:37:42,425 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 212 transitions. [2021-11-22 15:37:42,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:37:42,425 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 212 transitions. [2021-11-22 15:37:42,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-22 15:37:42,426 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:37:42,426 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:37:42,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-22 15:37:42,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:37:42,646 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-22 15:37:42,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:37:42,646 INFO L85 PathProgramCache]: Analyzing trace with hash 62520889, now seen corresponding path program 1 times [2021-11-22 15:37:42,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:37:42,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279281499] [2021-11-22 15:37:42,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:37:42,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:37:42,663 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:37:42,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1817247927] [2021-11-22 15:37:42,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:37:42,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:37:42,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:37:42,664 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:37:42,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-22 15:37:42,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:37:42,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-22 15:37:42,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:37:42,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:37:42,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 15:37:42,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:37:42,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279281499] [2021-11-22 15:37:42,785 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:37:42,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817247927] [2021-11-22 15:37:42,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817247927] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:37:42,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:37:42,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 15:37:42,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316313654] [2021-11-22 15:37:42,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:37:42,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:37:42,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:37:42,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:37:42,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:37:42,788 INFO L87 Difference]: Start difference. First operand 166 states and 212 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:37:42,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:37:42,889 INFO L93 Difference]: Finished difference Result 329 states and 420 transitions. [2021-11-22 15:37:42,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 15:37:42,889 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-22 15:37:42,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:37:42,892 INFO L225 Difference]: With dead ends: 329 [2021-11-22 15:37:42,892 INFO L226 Difference]: Without dead ends: 327 [2021-11-22 15:37:42,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:37:42,894 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 26 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:37:42,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 93 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:37:42,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-11-22 15:37:42,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 246. [2021-11-22 15:37:42,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 241 states have (on average 1.2821576763485478) internal successors, (309), 245 states have internal predecessors, (309), 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) [2021-11-22 15:37:42,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 309 transitions. [2021-11-22 15:37:42,955 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 309 transitions. Word has length 23 [2021-11-22 15:37:42,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:37:42,956 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 309 transitions. [2021-11-22 15:37:42,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:37:42,956 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 309 transitions. [2021-11-22 15:37:42,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-22 15:37:42,962 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:37:42,963 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:37:43,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-22 15:37:43,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-22 15:37:43,178 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-22 15:37:43,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:37:43,178 INFO L85 PathProgramCache]: Analyzing trace with hash 4760597, now seen corresponding path program 1 times [2021-11-22 15:37:43,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:37:43,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035116875] [2021-11-22 15:37:43,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:37:43,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:37:43,191 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:37:43,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1123447045] [2021-11-22 15:37:43,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:37:43,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:37:43,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:37:43,193 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:37:43,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-22 15:37:43,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:37:43,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-22 15:37:43,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:37:43,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:37:43,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:37:43,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:37:43,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:37:43,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035116875] [2021-11-22 15:37:43,722 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:37:43,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123447045] [2021-11-22 15:37:43,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123447045] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:37:43,723 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:37:43,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-11-22 15:37:43,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310398943] [2021-11-22 15:37:43,726 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:37:43,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-22 15:37:43,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:37:43,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-22 15:37:43,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-22 15:37:43,728 INFO L87 Difference]: Start difference. First operand 246 states and 309 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 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) [2021-11-22 15:37:43,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:37:43,857 INFO L93 Difference]: Finished difference Result 249 states and 311 transitions. [2021-11-22 15:37:43,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 15:37:43,860 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-22 15:37:43,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:37:43,863 INFO L225 Difference]: With dead ends: 249 [2021-11-22 15:37:43,863 INFO L226 Difference]: Without dead ends: 247 [2021-11-22 15:37:43,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-22 15:37:43,867 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 26 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:37:43,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 143 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 52 Unchecked, 0.1s Time] [2021-11-22 15:37:43,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-11-22 15:37:43,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 246. [2021-11-22 15:37:43,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 241 states have (on average 1.2780082987551866) internal successors, (308), 245 states have internal predecessors, (308), 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) [2021-11-22 15:37:43,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 308 transitions. [2021-11-22 15:37:43,909 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 308 transitions. Word has length 24 [2021-11-22 15:37:43,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:37:43,909 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 308 transitions. [2021-11-22 15:37:43,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 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) [2021-11-22 15:37:43,909 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 308 transitions. [2021-11-22 15:37:43,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-22 15:37:43,912 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:37:43,912 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:37:43,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-22 15:37:44,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:37:44,126 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-22 15:37:44,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:37:44,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1374585360, now seen corresponding path program 2 times [2021-11-22 15:37:44,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:37:44,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604391019] [2021-11-22 15:37:44,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:37:44,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:37:44,160 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:37:44,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [268033753] [2021-11-22 15:37:44,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 15:37:44,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:37:44,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:37:44,177 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:37:44,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-22 15:37:44,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 15:37:44,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:37:44,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-22 15:37:44,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:37:44,299 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:37:44,300 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 15:37:44,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:37:44,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604391019] [2021-11-22 15:37:44,300 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:37:44,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268033753] [2021-11-22 15:37:44,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268033753] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:37:44,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:37:44,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 15:37:44,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695521780] [2021-11-22 15:37:44,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:37:44,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 15:37:44,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:37:44,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 15:37:44,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:37:44,302 INFO L87 Difference]: Start difference. First operand 246 states and 308 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:37:44,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:37:44,411 INFO L93 Difference]: Finished difference Result 320 states and 391 transitions. [2021-11-22 15:37:44,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 15:37:44,412 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-22 15:37:44,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:37:44,414 INFO L225 Difference]: With dead ends: 320 [2021-11-22 15:37:44,414 INFO L226 Difference]: Without dead ends: 215 [2021-11-22 15:37:44,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:37:44,417 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 65 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:37:44,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 144 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:37:44,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-11-22 15:37:44,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 162. [2021-11-22 15:37:44,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.2292993630573248) internal successors, (193), 161 states have internal predecessors, (193), 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) [2021-11-22 15:37:44,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 193 transitions. [2021-11-22 15:37:44,445 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 193 transitions. Word has length 27 [2021-11-22 15:37:44,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:37:44,445 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 193 transitions. [2021-11-22 15:37:44,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 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) [2021-11-22 15:37:44,446 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 193 transitions. [2021-11-22 15:37:44,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-22 15:37:44,451 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:37:44,451 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:37:44,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-22 15:37:44,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:37:44,667 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-22 15:37:44,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:37:44,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1462495526, now seen corresponding path program 1 times [2021-11-22 15:37:44,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:37:44,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085439510] [2021-11-22 15:37:44,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:37:44,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:37:44,678 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:37:44,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [173911838] [2021-11-22 15:37:44,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:37:44,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:37:44,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:37:44,680 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:37:44,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-22 15:37:44,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:37:44,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-22 15:37:44,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:37:45,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:37:45,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:37:47,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:37:47,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:37:47,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085439510] [2021-11-22 15:37:47,462 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:37:47,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173911838] [2021-11-22 15:37:47,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173911838] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:37:47,462 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:37:47,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-11-22 15:37:47,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069634123] [2021-11-22 15:37:47,463 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:37:47,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-22 15:37:47,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:37:47,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-22 15:37:47,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2021-11-22 15:37:47,465 INFO L87 Difference]: Start difference. First operand 162 states and 193 transitions. Second operand has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 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) [2021-11-22 15:38:04,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:38:04,014 INFO L93 Difference]: Finished difference Result 491 states and 579 transitions. [2021-11-22 15:38:04,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-22 15:38:04,014 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-22 15:38:04,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:38:04,017 INFO L225 Difference]: With dead ends: 491 [2021-11-22 15:38:04,017 INFO L226 Difference]: Without dead ends: 366 [2021-11-22 15:38:04,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=818, Invalid=3342, Unknown=0, NotChecked=0, Total=4160 [2021-11-22 15:38:04,021 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 426 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2021-11-22 15:38:04,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 364 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2021-11-22 15:38:04,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-11-22 15:38:04,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 235. [2021-11-22 15:38:04,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.2217391304347827) internal successors, (281), 234 states have internal predecessors, (281), 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) [2021-11-22 15:38:04,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 281 transitions. [2021-11-22 15:38:04,066 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 281 transitions. Word has length 33 [2021-11-22 15:38:04,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:38:04,066 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 281 transitions. [2021-11-22 15:38:04,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 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) [2021-11-22 15:38:04,067 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 281 transitions. [2021-11-22 15:38:04,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-22 15:38:04,067 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:38:04,068 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:38:04,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-22 15:38:04,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:38:04,289 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-22 15:38:04,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:38:04,290 INFO L85 PathProgramCache]: Analyzing trace with hash -927480236, now seen corresponding path program 1 times [2021-11-22 15:38:04,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:38:04,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704480457] [2021-11-22 15:38:04,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:38:04,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:38:04,300 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:38:04,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [120724729] [2021-11-22 15:38:04,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:38:04,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:38:04,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:38:04,302 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:38:04,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-22 15:38:04,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:38:04,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-22 15:38:04,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:38:04,895 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:38:04,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:38:05,329 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-22 15:38:05,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:38:05,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704480457] [2021-11-22 15:38:05,329 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:38:05,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120724729] [2021-11-22 15:38:05,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120724729] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:38:05,329 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:38:05,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 13 [2021-11-22 15:38:05,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528151803] [2021-11-22 15:38:05,330 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:38:05,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-22 15:38:05,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:38:05,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-22 15:38:05,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-11-22 15:38:05,331 INFO L87 Difference]: Start difference. First operand 235 states and 281 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 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) [2021-11-22 15:38:06,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:38:06,290 INFO L93 Difference]: Finished difference Result 275 states and 327 transitions. [2021-11-22 15:38:06,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-22 15:38:06,291 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-22 15:38:06,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:38:06,293 INFO L225 Difference]: With dead ends: 275 [2021-11-22 15:38:06,293 INFO L226 Difference]: Without dead ends: 273 [2021-11-22 15:38:06,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=223, Invalid=479, Unknown=0, NotChecked=0, Total=702 [2021-11-22 15:38:06,295 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 206 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 15:38:06,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 149 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 15:38:06,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-11-22 15:38:06,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 201. [2021-11-22 15:38:06,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 197 states have (on average 1.1827411167512691) internal successors, (233), 200 states have internal predecessors, (233), 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) [2021-11-22 15:38:06,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 233 transitions. [2021-11-22 15:38:06,346 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 233 transitions. Word has length 33 [2021-11-22 15:38:06,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:38:06,346 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 233 transitions. [2021-11-22 15:38:06,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 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) [2021-11-22 15:38:06,347 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 233 transitions. [2021-11-22 15:38:06,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-22 15:38:06,347 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:38:06,347 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:38:06,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-22 15:38:06,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:38:06,570 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-22 15:38:06,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:38:06,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1433786576, now seen corresponding path program 1 times [2021-11-22 15:38:06,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:38:06,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261466247] [2021-11-22 15:38:06,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:38:06,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:38:06,579 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:38:06,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1004427027] [2021-11-22 15:38:06,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:38:06,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:38:06,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:38:06,596 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:38:06,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-22 15:38:06,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:38:06,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-22 15:38:06,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:38:06,772 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 15:38:06,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:38:06,860 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 15:38:06,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:38:06,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261466247] [2021-11-22 15:38:06,860 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:38:06,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004427027] [2021-11-22 15:38:06,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004427027] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:38:06,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:38:06,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-11-22 15:38:06,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215197320] [2021-11-22 15:38:06,861 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:38:06,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 15:38:06,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:38:06,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 15:38:06,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:38:06,863 INFO L87 Difference]: Start difference. First operand 201 states and 233 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 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) [2021-11-22 15:38:07,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:38:07,180 INFO L93 Difference]: Finished difference Result 205 states and 235 transitions. [2021-11-22 15:38:07,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 15:38:07,180 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-22 15:38:07,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:38:07,183 INFO L225 Difference]: With dead ends: 205 [2021-11-22 15:38:07,183 INFO L226 Difference]: Without dead ends: 203 [2021-11-22 15:38:07,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-22 15:38:07,185 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 36 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 15:38:07,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 116 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 15:38:07,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-11-22 15:38:07,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 160. [2021-11-22 15:38:07,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 156 states have (on average 1.1666666666666667) internal successors, (182), 159 states have internal predecessors, (182), 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) [2021-11-22 15:38:07,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 182 transitions. [2021-11-22 15:38:07,220 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 182 transitions. Word has length 34 [2021-11-22 15:38:07,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:38:07,221 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 182 transitions. [2021-11-22 15:38:07,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 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) [2021-11-22 15:38:07,222 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 182 transitions. [2021-11-22 15:38:07,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-22 15:38:07,223 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:38:07,223 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:38:07,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-22 15:38:07,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-22 15:38:07,438 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-22 15:38:07,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:38:07,439 INFO L85 PathProgramCache]: Analyzing trace with hash -624531068, now seen corresponding path program 1 times [2021-11-22 15:38:07,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:38:07,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558723698] [2021-11-22 15:38:07,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:38:07,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:38:07,448 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:38:07,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1813593566] [2021-11-22 15:38:07,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:38:07,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:38:07,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:38:07,452 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:38:07,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-22 15:38:07,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:38:07,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-22 15:38:07,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:38:07,587 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 15:38:07,588 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 15:38:07,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:38:07,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558723698] [2021-11-22 15:38:07,588 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:38:07,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813593566] [2021-11-22 15:38:07,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813593566] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:38:07,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:38:07,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 15:38:07,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079692055] [2021-11-22 15:38:07,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:38:07,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 15:38:07,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:38:07,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 15:38:07,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:38:07,592 INFO L87 Difference]: Start difference. First operand 160 states and 182 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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) [2021-11-22 15:38:07,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:38:07,673 INFO L93 Difference]: Finished difference Result 314 states and 362 transitions. [2021-11-22 15:38:07,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 15:38:07,673 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-22 15:38:07,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:38:07,675 INFO L225 Difference]: With dead ends: 314 [2021-11-22 15:38:07,675 INFO L226 Difference]: Without dead ends: 206 [2021-11-22 15:38:07,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:38:07,679 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 9 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:38:07,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 93 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:38:07,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-22 15:38:07,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 193. [2021-11-22 15:38:07,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 189 states have (on average 1.164021164021164) internal successors, (220), 192 states have internal predecessors, (220), 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) [2021-11-22 15:38:07,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 220 transitions. [2021-11-22 15:38:07,747 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 220 transitions. Word has length 39 [2021-11-22 15:38:07,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:38:07,747 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 220 transitions. [2021-11-22 15:38:07,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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) [2021-11-22 15:38:07,747 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 220 transitions. [2021-11-22 15:38:07,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-22 15:38:07,748 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:38:07,748 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:38:07,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-22 15:38:07,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-22 15:38:07,966 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-22 15:38:07,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:38:07,966 INFO L85 PathProgramCache]: Analyzing trace with hash -899920700, now seen corresponding path program 1 times [2021-11-22 15:38:07,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:38:07,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761907096] [2021-11-22 15:38:07,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:38:07,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:38:07,976 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:38:07,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1176572801] [2021-11-22 15:38:07,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:38:07,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:38:07,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:38:07,979 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:38:07,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-22 15:38:08,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:38:08,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-22 15:38:08,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:38:08,175 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 15:38:08,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:38:08,277 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 15:38:08,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:38:08,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761907096] [2021-11-22 15:38:08,278 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:38:08,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176572801] [2021-11-22 15:38:08,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176572801] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:38:08,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:38:08,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-22 15:38:08,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189934264] [2021-11-22 15:38:08,279 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:38:08,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 15:38:08,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:38:08,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 15:38:08,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:38:08,281 INFO L87 Difference]: Start difference. First operand 193 states and 220 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:38:08,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:38:08,486 INFO L93 Difference]: Finished difference Result 193 states and 220 transitions. [2021-11-22 15:38:08,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 15:38:08,487 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-22 15:38:08,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:38:08,488 INFO L225 Difference]: With dead ends: 193 [2021-11-22 15:38:08,488 INFO L226 Difference]: Without dead ends: 191 [2021-11-22 15:38:08,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-22 15:38:08,489 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 59 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:38:08,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 67 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:38:08,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-22 15:38:08,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 114. [2021-11-22 15:38:08,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 111 states have (on average 1.117117117117117) internal successors, (124), 113 states have internal predecessors, (124), 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) [2021-11-22 15:38:08,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 124 transitions. [2021-11-22 15:38:08,517 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 124 transitions. Word has length 40 [2021-11-22 15:38:08,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:38:08,518 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 124 transitions. [2021-11-22 15:38:08,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:38:08,518 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 124 transitions. [2021-11-22 15:38:08,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-22 15:38:08,519 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:38:08,519 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:38:08,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-22 15:38:08,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-22 15:38:08,746 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-22 15:38:08,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:38:08,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1535208889, now seen corresponding path program 1 times [2021-11-22 15:38:08,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:38:08,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754084201] [2021-11-22 15:38:08,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:38:08,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:38:08,754 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:38:08,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1109532014] [2021-11-22 15:38:08,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:38:08,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:38:08,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:38:08,756 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:38:08,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-22 15:38:08,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:38:08,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-22 15:38:08,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:38:10,406 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:38:10,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:38:13,109 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:38:13,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:38:13,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754084201] [2021-11-22 15:38:13,110 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:38:13,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109532014] [2021-11-22 15:38:13,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109532014] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:38:13,111 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:38:13,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-11-22 15:38:13,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458400845] [2021-11-22 15:38:13,111 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:38:13,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-22 15:38:13,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:38:13,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-22 15:38:13,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2021-11-22 15:38:13,113 INFO L87 Difference]: Start difference. First operand 114 states and 124 transitions. Second operand has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 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) [2021-11-22 15:38:15,652 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:38:17,612 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:38:42,600 WARN L227 SmtUtils]: Spent 5.22s on a formula simplification. DAG size of input: 63 DAG size of output: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 15:38:50,263 WARN L227 SmtUtils]: Spent 5.86s on a formula simplification. DAG size of input: 64 DAG size of output: 61 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 15:38:56,959 WARN L227 SmtUtils]: Spent 5.20s on a formula simplification. DAG size of input: 61 DAG size of output: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 15:39:03,690 WARN L227 SmtUtils]: Spent 5.40s on a formula simplification. DAG size of input: 63 DAG size of output: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 15:39:07,602 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:39:16,750 WARN L227 SmtUtils]: Spent 6.50s on a formula simplification. DAG size of input: 58 DAG size of output: 55 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 15:39:43,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:39:43,248 INFO L93 Difference]: Finished difference Result 389 states and 430 transitions. [2021-11-22 15:39:43,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-22 15:39:43,249 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-22 15:39:43,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:39:43,252 INFO L225 Difference]: With dead ends: 389 [2021-11-22 15:39:43,252 INFO L226 Difference]: Without dead ends: 385 [2021-11-22 15:39:43,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1418 ImplicationChecksByTransitivity, 73.0s TimeCoverageRelationStatistics Valid=1069, Invalid=3760, Unknown=1, NotChecked=0, Total=4830 [2021-11-22 15:39:43,257 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 590 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 282 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.6s IncrementalHoareTripleChecker+Time [2021-11-22 15:39:43,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [590 Valid, 377 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 769 Invalid, 1 Unknown, 0 Unchecked, 19.6s Time] [2021-11-22 15:39:43,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-11-22 15:39:43,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 164. [2021-11-22 15:39:43,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 161 states have (on average 1.1180124223602483) internal successors, (180), 163 states have internal predecessors, (180), 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) [2021-11-22 15:39:43,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 180 transitions. [2021-11-22 15:39:43,329 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 180 transitions. Word has length 42 [2021-11-22 15:39:43,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:39:43,330 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 180 transitions. [2021-11-22 15:39:43,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 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) [2021-11-22 15:39:43,330 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 180 transitions. [2021-11-22 15:39:43,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-22 15:39:43,331 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:39:43,331 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:39:43,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-22 15:39:43,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:39:43,550 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-22 15:39:43,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:39:43,550 INFO L85 PathProgramCache]: Analyzing trace with hash -79294909, now seen corresponding path program 1 times [2021-11-22 15:39:43,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:39:43,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424098229] [2021-11-22 15:39:43,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:39:43,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:39:43,566 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:39:43,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1784709130] [2021-11-22 15:39:43,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:39:43,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:39:43,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:39:43,579 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:39:43,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-22 15:39:43,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:39:43,651 WARN L261 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 89 conjunts are in the unsatisfiable core [2021-11-22 15:39:43,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:39:46,407 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:39:46,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:39:51,346 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 15:39:51,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:39:51,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424098229] [2021-11-22 15:39:51,346 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:39:51,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784709130] [2021-11-22 15:39:51,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784709130] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:39:51,347 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:39:51,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 34 [2021-11-22 15:39:51,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201172907] [2021-11-22 15:39:51,347 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:39:51,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-22 15:39:51,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:39:51,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-22 15:39:51,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=904, Unknown=0, NotChecked=0, Total=1122 [2021-11-22 15:39:51,349 INFO L87 Difference]: Start difference. First operand 164 states and 180 transitions. Second operand has 34 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 34 states have internal predecessors, (90), 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) [2021-11-22 15:40:50,999 WARN L227 SmtUtils]: Spent 6.19s on a formula simplification that was a NOOP. DAG size: 69 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 15:41:02,418 WARN L227 SmtUtils]: Spent 7.61s on a formula simplification. DAG size of input: 83 DAG size of output: 77 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 15:41:22,755 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:41:39,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:41:39,038 INFO L93 Difference]: Finished difference Result 361 states and 398 transitions. [2021-11-22 15:41:39,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-11-22 15:41:39,039 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 34 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-22 15:41:39,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:41:39,041 INFO L225 Difference]: With dead ends: 361 [2021-11-22 15:41:39,041 INFO L226 Difference]: Without dead ends: 355 [2021-11-22 15:41:39,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6221 ImplicationChecksByTransitivity, 96.2s TimeCoverageRelationStatistics Valid=3025, Invalid=14267, Unknown=0, NotChecked=0, Total=17292 [2021-11-22 15:41:39,048 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 792 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 1177 mSolverCounterSat, 373 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 792 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 1551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 1177 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.2s IncrementalHoareTripleChecker+Time [2021-11-22 15:41:39,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [792 Valid, 406 Invalid, 1551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 1177 Invalid, 1 Unknown, 0 Unchecked, 15.2s Time] [2021-11-22 15:41:39,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-11-22 15:41:39,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 238. [2021-11-22 15:41:39,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 235 states have (on average 1.127659574468085) internal successors, (265), 237 states have internal predecessors, (265), 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) [2021-11-22 15:41:39,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 265 transitions. [2021-11-22 15:41:39,145 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 265 transitions. Word has length 48 [2021-11-22 15:41:39,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:41:39,146 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 265 transitions. [2021-11-22 15:41:39,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 34 states have internal predecessors, (90), 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) [2021-11-22 15:41:39,146 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 265 transitions. [2021-11-22 15:41:39,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-22 15:41:39,147 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:41:39,147 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:41:39,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-22 15:41:39,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-22 15:41:39,360 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-22 15:41:39,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:41:39,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1379160389, now seen corresponding path program 2 times [2021-11-22 15:41:39,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:41:39,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455152833] [2021-11-22 15:41:39,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:41:39,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:41:39,369 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:41:39,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2041116190] [2021-11-22 15:41:39,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 15:41:39,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:41:39,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:41:39,374 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:41:39,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-22 15:41:39,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 15:41:39,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:41:39,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-22 15:41:39,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:41:40,998 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:41:40,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:41:59,755 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-22 15:41:59,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:41:59,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455152833] [2021-11-22 15:41:59,755 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:41:59,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041116190] [2021-11-22 15:41:59,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041116190] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:41:59,755 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:41:59,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 31 [2021-11-22 15:41:59,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835229389] [2021-11-22 15:41:59,756 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:41:59,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-22 15:41:59,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:41:59,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-22 15:41:59,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=677, Unknown=1, NotChecked=0, Total=930 [2021-11-22 15:41:59,758 INFO L87 Difference]: Start difference. First operand 238 states and 265 transitions. Second operand has 31 states, 31 states have (on average 3.193548387096774) internal successors, (99), 31 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:42:02,235 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:42:04,867 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:42:06,898 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:42:14,396 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:42:16,451 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:42:28,365 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:42:45,316 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:42:58,805 WARN L227 SmtUtils]: Spent 8.70s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 15:43:14,674 WARN L227 SmtUtils]: Spent 9.86s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 15:43:28,891 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:44:02,211 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:44:10,480 WARN L227 SmtUtils]: Spent 6.77s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 15:44:12,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:44:12,591 INFO L93 Difference]: Finished difference Result 468 states and 516 transitions. [2021-11-22 15:44:12,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-22 15:44:12,592 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.193548387096774) internal successors, (99), 31 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-22 15:44:12,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:44:12,594 INFO L225 Difference]: With dead ends: 468 [2021-11-22 15:44:12,595 INFO L226 Difference]: Without dead ends: 462 [2021-11-22 15:44:12,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2203 ImplicationChecksByTransitivity, 103.9s TimeCoverageRelationStatistics Valid=2152, Invalid=5503, Unknown=1, NotChecked=0, Total=7656 [2021-11-22 15:44:12,599 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 461 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 326 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.7s IncrementalHoareTripleChecker+Time [2021-11-22 15:44:12,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [461 Valid, 317 Invalid, 1308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 976 Invalid, 6 Unknown, 0 Unchecked, 34.7s Time] [2021-11-22 15:44:12,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-22 15:44:12,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 291. [2021-11-22 15:44:12,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 288 states have (on average 1.1284722222222223) internal successors, (325), 290 states have internal predecessors, (325), 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) [2021-11-22 15:44:12,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 325 transitions. [2021-11-22 15:44:12,785 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 325 transitions. Word has length 56 [2021-11-22 15:44:12,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:44:12,786 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 325 transitions. [2021-11-22 15:44:12,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.193548387096774) internal successors, (99), 31 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:44:12,786 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 325 transitions. [2021-11-22 15:44:12,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-22 15:44:12,787 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:44:12,787 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:44:12,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-22 15:44:13,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-22 15:44:13,010 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-22 15:44:13,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:44:13,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1005275417, now seen corresponding path program 1 times [2021-11-22 15:44:13,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:44:13,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512037328] [2021-11-22 15:44:13,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:44:13,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:44:13,018 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:44:13,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [831408433] [2021-11-22 15:44:13,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:44:13,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:44:13,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:44:13,021 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:44:13,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-22 15:44:13,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:44:13,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-22 15:44:13,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:44:13,469 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 35 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 15:44:13,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:44:14,142 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 37 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 15:44:14,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:44:14,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512037328] [2021-11-22 15:44:14,143 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:44:14,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831408433] [2021-11-22 15:44:14,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831408433] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:44:14,143 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:44:14,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-11-22 15:44:14,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827016886] [2021-11-22 15:44:14,143 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:44:14,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-22 15:44:14,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:44:14,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-22 15:44:14,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-11-22 15:44:14,145 INFO L87 Difference]: Start difference. First operand 291 states and 325 transitions. Second operand has 15 states, 15 states have (on average 6.066666666666666) internal successors, (91), 15 states have internal predecessors, (91), 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) [2021-11-22 15:44:16,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:44:16,459 INFO L93 Difference]: Finished difference Result 740 states and 830 transitions. [2021-11-22 15:44:16,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-22 15:44:16,460 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.066666666666666) internal successors, (91), 15 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-22 15:44:16,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:44:16,463 INFO L225 Difference]: With dead ends: 740 [2021-11-22 15:44:16,463 INFO L226 Difference]: Without dead ends: 738 [2021-11-22 15:44:16,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=454, Invalid=1028, Unknown=0, NotChecked=0, Total=1482 [2021-11-22 15:44:16,465 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 292 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-22 15:44:16,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 218 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-22 15:44:16,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2021-11-22 15:44:16,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 430. [2021-11-22 15:44:16,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 427 states have (on average 1.1241217798594847) internal successors, (480), 429 states have internal predecessors, (480), 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) [2021-11-22 15:44:16,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 480 transitions. [2021-11-22 15:44:16,681 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 480 transitions. Word has length 62 [2021-11-22 15:44:16,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:44:16,681 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 480 transitions. [2021-11-22 15:44:16,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.066666666666666) internal successors, (91), 15 states have internal predecessors, (91), 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) [2021-11-22 15:44:16,681 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 480 transitions. [2021-11-22 15:44:16,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-22 15:44:16,682 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:44:16,682 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:44:16,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-22 15:44:16,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:44:16,894 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-22 15:44:16,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:44:16,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1719471762, now seen corresponding path program 1 times [2021-11-22 15:44:16,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:44:16,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111391765] [2021-11-22 15:44:16,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:44:16,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:44:16,902 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:44:16,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1560937578] [2021-11-22 15:44:16,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:44:16,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:44:16,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:44:16,904 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:44:16,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-22 15:44:16,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:44:16,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-22 15:44:16,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:44:18,936 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:44:18,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:44:58,381 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 52 proven. 13 refuted. 1 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 15:44:58,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:44:58,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111391765] [2021-11-22 15:44:58,382 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:44:58,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560937578] [2021-11-22 15:44:58,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560937578] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:44:58,382 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:44:58,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 30 [2021-11-22 15:44:58,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406943496] [2021-11-22 15:44:58,382 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:44:58,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-22 15:44:58,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:44:58,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-22 15:44:58,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=688, Unknown=13, NotChecked=0, Total=870 [2021-11-22 15:44:58,384 INFO L87 Difference]: Start difference. First operand 430 states and 480 transitions. Second operand has 30 states, 30 states have (on average 3.9) internal successors, (117), 30 states have internal predecessors, (117), 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) [2021-11-22 15:45:04,311 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:45:06,316 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:45:11,830 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:45:13,832 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:45:16,763 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:45:21,663 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:45:38,422 WARN L227 SmtUtils]: Spent 12.32s on a formula simplification. DAG size of input: 69 DAG size of output: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 15:45:53,261 WARN L227 SmtUtils]: Spent 13.94s on a formula simplification. DAG size of input: 75 DAG size of output: 56 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 15:45:56,630 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:45:58,157 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:46:00,570 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:46:02,573 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:46:08,743 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:46:10,781 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:46:12,784 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:46:14,787 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:46:16,790 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:46:18,793 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:46:20,795 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:46:22,798 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:46:24,800 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:46:26,802 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:46:29,369 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:46:35,618 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:46:37,828 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:46:39,712 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:46:41,927 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:46:43,931 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:46:44,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:46:44,725 INFO L93 Difference]: Finished difference Result 876 states and 978 transitions. [2021-11-22 15:46:44,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-22 15:46:44,725 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.9) internal successors, (117), 30 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-22 15:46:44,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:46:44,728 INFO L225 Difference]: With dead ends: 876 [2021-11-22 15:46:44,729 INFO L226 Difference]: Without dead ends: 872 [2021-11-22 15:46:44,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 75.0s TimeCoverageRelationStatistics Valid=1169, Invalid=4219, Unknown=14, NotChecked=0, Total=5402 [2021-11-22 15:46:44,731 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 370 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 1094 mSolverCounterSat, 199 mSolverCounterUnsat, 20 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 68.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 1313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 1094 IncrementalHoareTripleChecker+Invalid, 20 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 69.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:46:44,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 381 Invalid, 1313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 1094 Invalid, 20 Unknown, 0 Unchecked, 69.1s Time] [2021-11-22 15:46:44,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2021-11-22 15:46:44,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 463. [2021-11-22 15:46:44,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 461 states have (on average 1.119305856832972) internal successors, (516), 462 states have internal predecessors, (516), 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) [2021-11-22 15:46:44,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 516 transitions. [2021-11-22 15:46:44,974 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 516 transitions. Word has length 65 [2021-11-22 15:46:44,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:46:44,974 INFO L470 AbstractCegarLoop]: Abstraction has 463 states and 516 transitions. [2021-11-22 15:46:44,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.9) internal successors, (117), 30 states have internal predecessors, (117), 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) [2021-11-22 15:46:44,975 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 516 transitions. [2021-11-22 15:46:44,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-22 15:46:44,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:46:44,980 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:46:45,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-22 15:46:45,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-11-22 15:46:45,180 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-22 15:46:45,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:46:45,181 INFO L85 PathProgramCache]: Analyzing trace with hash -890575282, now seen corresponding path program 3 times [2021-11-22 15:46:45,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:46:45,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241468892] [2021-11-22 15:46:45,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:46:45,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:46:45,194 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:46:45,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [971791052] [2021-11-22 15:46:45,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 15:46:45,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:46:45,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:46:45,196 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:46:45,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-22 15:46:45,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-22 15:46:45,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:46:45,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-22 15:46:45,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:46:55,781 WARN L227 SmtUtils]: Spent 5.44s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 15:47:24,923 WARN L227 SmtUtils]: Spent 12.14s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 15:47:25,485 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 15:47:25,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:47:56,774 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 52 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-22 15:47:56,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:47:56,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241468892] [2021-11-22 15:47:56,774 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:47:56,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971791052] [2021-11-22 15:47:56,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971791052] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:47:56,774 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:47:56,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-11-22 15:47:56,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408262511] [2021-11-22 15:47:56,775 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:47:56,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-22 15:47:56,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:47:56,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-22 15:47:56,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=472, Unknown=15, NotChecked=0, Total=600 [2021-11-22 15:47:56,777 INFO L87 Difference]: Start difference. First operand 463 states and 516 transitions. Second operand has 25 states, 25 states have (on average 4.32) internal successors, (108), 25 states have internal predecessors, (108), 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) [2021-11-22 15:48:22,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:48:22,653 INFO L93 Difference]: Finished difference Result 623 states and 696 transitions. [2021-11-22 15:48:22,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-22 15:48:22,654 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.32) internal successors, (108), 25 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-22 15:48:22,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:48:22,656 INFO L225 Difference]: With dead ends: 623 [2021-11-22 15:48:22,656 INFO L226 Difference]: Without dead ends: 618 [2021-11-22 15:48:22,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 122 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 83.1s TimeCoverageRelationStatistics Valid=403, Invalid=1743, Unknown=16, NotChecked=0, Total=2162 [2021-11-22 15:48:22,657 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 90 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-22 15:48:22,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 253 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 186 Invalid, 0 Unknown, 178 Unchecked, 1.6s Time] [2021-11-22 15:48:22,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2021-11-22 15:48:22,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 492. [2021-11-22 15:48:22,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 490 states have (on average 1.1224489795918366) internal successors, (550), 491 states have internal predecessors, (550), 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) [2021-11-22 15:48:22,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 550 transitions. [2021-11-22 15:48:22,974 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 550 transitions. Word has length 71 [2021-11-22 15:48:22,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:48:22,974 INFO L470 AbstractCegarLoop]: Abstraction has 492 states and 550 transitions. [2021-11-22 15:48:22,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.32) internal successors, (108), 25 states have internal predecessors, (108), 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) [2021-11-22 15:48:22,975 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 550 transitions. [2021-11-22 15:48:22,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-22 15:48:22,976 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:48:22,976 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:48:22,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-22 15:48:23,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-22 15:48:23,186 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-22 15:48:23,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:48:23,186 INFO L85 PathProgramCache]: Analyzing trace with hash 62426466, now seen corresponding path program 4 times [2021-11-22 15:48:23,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:48:23,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821712900] [2021-11-22 15:48:23,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:48:23,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:48:23,191 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:48:23,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [878767673] [2021-11-22 15:48:23,192 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 15:48:23,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:48:23,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:48:23,194 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:48:23,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-22 15:48:23,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 15:48:23,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:48:23,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 15:48:23,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:48:23,459 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 99 proven. 30 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-22 15:48:23,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:48:23,654 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 99 proven. 30 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-22 15:48:23,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:48:23,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821712900] [2021-11-22 15:48:23,654 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:48:23,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878767673] [2021-11-22 15:48:23,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878767673] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:48:23,655 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:48:23,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-11-22 15:48:23,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198569448] [2021-11-22 15:48:23,655 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:48:23,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 15:48:23,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:48:23,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 15:48:23,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-22 15:48:23,656 INFO L87 Difference]: Start difference. First operand 492 states and 550 transitions. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 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) [2021-11-22 15:48:24,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:48:24,202 INFO L93 Difference]: Finished difference Result 944 states and 1060 transitions. [2021-11-22 15:48:24,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 15:48:24,205 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-22 15:48:24,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:48:24,207 INFO L225 Difference]: With dead ends: 944 [2021-11-22 15:48:24,207 INFO L226 Difference]: Without dead ends: 637 [2021-11-22 15:48:24,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 169 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-22 15:48:24,209 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 46 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:48:24,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 187 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:48:24,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-11-22 15:48:24,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 534. [2021-11-22 15:48:24,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 532 states have (on average 1.1240601503759398) internal successors, (598), 533 states have internal predecessors, (598), 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) [2021-11-22 15:48:24,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 598 transitions. [2021-11-22 15:48:24,527 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 598 transitions. Word has length 89 [2021-11-22 15:48:24,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:48:24,528 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 598 transitions. [2021-11-22 15:48:24,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 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) [2021-11-22 15:48:24,528 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 598 transitions. [2021-11-22 15:48:24,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-22 15:48:24,530 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:48:24,530 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:48:24,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-22 15:48:24,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-22 15:48:24,746 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-22 15:48:24,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:48:24,746 INFO L85 PathProgramCache]: Analyzing trace with hash -2004343961, now seen corresponding path program 5 times [2021-11-22 15:48:24,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:48:24,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662573588] [2021-11-22 15:48:24,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:48:24,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:48:24,753 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:48:24,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [659224411] [2021-11-22 15:48:24,757 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 15:48:24,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:48:24,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:48:24,758 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:48:24,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a089cfce-28ae-4dc7-bd6a-4445686b4dfa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-22 15:48:25,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-22 15:48:25,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:48:25,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 111 conjunts are in the unsatisfiable core [2021-11-22 15:48:25,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:48:30,974 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:48:30,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:49:09,411 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:49:09,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:49:09,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662573588] [2021-11-22 15:49:09,412 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:49:09,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659224411] [2021-11-22 15:49:09,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659224411] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:49:09,412 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:49:09,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 44 [2021-11-22 15:49:09,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827396174] [2021-11-22 15:49:09,413 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:49:09,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-22 15:49:09,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:49:09,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-22 15:49:09,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=1571, Unknown=5, NotChecked=0, Total=1892 [2021-11-22 15:49:09,415 INFO L87 Difference]: Start difference. First operand 534 states and 598 transitions. Second operand has 44 states, 44 states have (on average 4.25) internal successors, (187), 44 states have internal predecessors, (187), 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) [2021-11-22 15:49:29,199 WARN L227 SmtUtils]: Spent 15.45s on a formula simplification that was a NOOP. DAG size: 81 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 15:49:43,591 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:49:55,212 WARN L227 SmtUtils]: Spent 10.41s on a formula simplification that was a NOOP. DAG size: 120 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 15:49:57,909 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:49:59,629 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:50:36,234 WARN L227 SmtUtils]: Spent 15.20s on a formula simplification. DAG size of input: 90 DAG size of output: 86 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 15:50:57,580 WARN L227 SmtUtils]: Spent 5.86s on a formula simplification that was a NOOP. DAG size: 99 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 15:51:25,520 WARN L227 SmtUtils]: Spent 16.04s on a formula simplification that was a NOOP. DAG size: 74 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)